| #!/usr/bin/env python |
| |
| r""" |
| This module provides many valuable print functions such as sprint_var, |
| sprint_time, sprint_error, sprint_call_stack. |
| """ |
| |
| import sys |
| import os |
| import time |
| import inspect |
| import re |
| import grp |
| import socket |
| import argparse |
| import __builtin__ |
| import logging |
| import collections |
| |
| try: |
| from robot.utils import DotDict |
| except ImportError: |
| pass |
| |
| import gen_arg as ga |
| |
| # Setting these variables for use both inside this module and by programs |
| # importing this module. |
| pgm_dir_path = sys.argv[0] |
| pgm_name = os.path.basename(pgm_dir_path) |
| pgm_dir_name = re.sub("/" + pgm_name, "", pgm_dir_path) + "/" |
| |
| |
| # Some functions (e.g. sprint_pgm_header) have need of a program name value |
| # that looks more like a valid variable name. Therefore, we'll swap odd |
| # characters like "." out for underscores. |
| pgm_name_var_name = pgm_name.replace(".", "_") |
| |
| # Initialize global values used as defaults by print_time, print_var, etc. |
| col1_indent = 0 |
| |
| # Calculate default column width for print_var functions based on environment |
| # variable settings. The objective is to make the variable values line up |
| # nicely with the time stamps. |
| col1_width = 29 |
| if 'NANOSECONDS' in os.environ: |
| NANOSECONDS = os.environ['NANOSECONDS'] |
| else: |
| NANOSECONDS = 0 |
| |
| if NANOSECONDS == "1": |
| col1_width = col1_width + 7 |
| |
| if 'SHOW_ELAPSED_TIME' in os.environ: |
| SHOW_ELAPSED_TIME = os.environ['SHOW_ELAPSED_TIME'] |
| else: |
| SHOW_ELAPSED_TIME = 0 |
| |
| if SHOW_ELAPSED_TIME == "1": |
| if NANOSECONDS == "1": |
| col1_width = col1_width + 14 |
| else: |
| col1_width = col1_width + 7 |
| |
| # Initialize some time variables used in module functions. |
| start_time = time.time() |
| sprint_time_last_seconds = start_time |
| |
| try: |
| # The user can set environment variable "GEN_PRINT_DEBUG" to get debug |
| # output from this module. |
| gen_print_debug = int(os.environ['GEN_PRINT_DEBUG']) |
| except KeyError: |
| gen_print_debug = 0 |
| |
| |
| ############################################################################### |
| def sprint_func_name(stack_frame_ix=None): |
| |
| r""" |
| Return the function name associated with the indicated stack frame. |
| |
| Description of arguments: |
| stack_frame_ix The index of the stack frame whose |
| function name should be returned. If the |
| caller does not specifiy a value, this |
| function will set the value to 1 which is |
| the index of the caller's stack frame. If |
| the caller is the wrapper function |
| "print_func_name", this function will bump |
| it up by 1. |
| """ |
| |
| # If user specified no stack_frame_ix, we'll set it to a proper default |
| # value. |
| if stack_frame_ix is None: |
| func_name = sys._getframe().f_code.co_name |
| caller_func_name = sys._getframe(1).f_code.co_name |
| if func_name[1:] == caller_func_name: |
| stack_frame_ix = 2 |
| else: |
| stack_frame_ix = 1 |
| |
| func_name = sys._getframe(stack_frame_ix).f_code.co_name |
| |
| return func_name |
| |
| ############################################################################### |
| |
| |
| # get_arg_name is not a print function per se. I have included it in this |
| # module because it is used by sprint_var which is found in this module. |
| ############################################################################### |
| def get_arg_name(var, |
| arg_num=1, |
| stack_frame_ix=1): |
| |
| r""" |
| Return the "name" of an argument passed to a function. This could be a |
| literal or a variable name. |
| |
| Description of arguements: |
| var The variable whose name you want returned. |
| arg_num The arg number (1 through n) whose name |
| you wish to have returned. This value |
| should not exceed the number of arguments |
| allowed by the target function. |
| stack_frame_ix The stack frame index of the target |
| function. This value must be 1 or |
| greater. 1 would indicate get_arg_name's |
| stack frame. 2 would be the caller of |
| get_arg_name's stack frame, etc. |
| |
| Example 1: |
| |
| my_var = "mike" |
| var_name = get_arg_name(my_var) |
| |
| In this example, var_name will receive the value "my_var". |
| |
| Example 2: |
| |
| def test1(var): |
| # Getting the var name of the first arg to this function, test1. |
| # Note, in this case, it doesn't matter what you pass as the first arg |
| # to get_arg_name since it is the caller's variable name that matters. |
| dummy = 1 |
| arg_num = 1 |
| stack_frame = 2 |
| var_name = get_arg_name(dummy, arg_num, stack_frame) |
| |
| # Mainline... |
| |
| another_var = "whatever" |
| test1(another_var) |
| |
| In this example, var_name will be set to "another_var". |
| |
| """ |
| |
| # Note: I wish to avoid recursion so I refrain from calling any function |
| # that calls this function (i.e. sprint_var, valid_value, etc.). |
| |
| try: |
| # The user can set environment variable "GET_ARG_NAME_DEBUG" to get |
| # debug output from this function. |
| local_debug = os.environ['GET_ARG_NAME_DEBUG'] |
| except KeyError: |
| local_debug = 0 |
| |
| if arg_num < 1: |
| print_error("Programmer error - Variable \"arg_num\" has an invalid" + |
| " value of \"" + str(arg_num) + "\". The value must be" + |
| " an integer that is greater than 0.\n") |
| # What is the best way to handle errors? Raise exception? I'll |
| # revisit later. |
| return |
| if stack_frame_ix < 1: |
| print_error("Programmer error - Variable \"stack_frame_ix\" has an" + |
| " invalid value of \"" + str(stack_frame_ix) + "\". The" + |
| " value must be an integer that is greater than or equal" + |
| " to 1.\n") |
| return |
| |
| if local_debug: |
| debug_indent = 2 |
| print(sprint_func_name() + "() parms:") |
| print_varx("var", var, 0, debug_indent) |
| print_varx("arg_num", arg_num, 0, debug_indent) |
| print_varx("stack_frame_ix", stack_frame_ix, 0, debug_indent) |
| |
| try: |
| frame, filename, cur_line_no, function_name, lines, index = \ |
| inspect.stack()[stack_frame_ix] |
| except IndexError: |
| print_error("Programmer error - The caller has asked for information" + |
| " about the stack frame at index \"" + |
| str(stack_frame_ix) + "\". However, the stack only" + |
| " contains " + str(len(inspect.stack())) + " entries." + |
| " Therefore the stack frame index is out of range.\n") |
| return |
| |
| if local_debug: |
| print("\nVariables retrieved from inspect.stack() function:") |
| print_varx("frame", frame, 0, debug_indent) |
| print_varx("filename", filename, 0, debug_indent) |
| print_varx("cur_line_no", cur_line_no, 0, debug_indent) |
| print_varx("function_name", function_name, 0, debug_indent) |
| print_varx("lines", lines, 0, debug_indent) |
| print_varx("index", index, 0, debug_indent) |
| |
| composite_line = lines[0].strip() |
| |
| called_func_name = sprint_func_name(stack_frame_ix) |
| # Needed to add a right anchor to func_regex for cases like this where |
| # there is an arg whose name is a substring of the function name. So the |
| # function name needs to be bounded on the right by zero or more spaces |
| # and a left parenthesis. |
| # if not valid_value(whatever, valid_values=["one", "two"]): |
| func_regex = ".*" + called_func_name + "[ ]*\(" |
| # if not re.match(r".*" + called_func_name, composite_line): |
| if not re.match(func_regex, composite_line): |
| # The called function name was not found in the composite line. The |
| # caller may be using a function alias. |
| # I added code to handle pvar, qpvar, dpvar, etc. aliases. |
| # pvar is an alias for print_var. However, when it is used, |
| # sprint_func_name() returns the non-alias version, i.e. "print_var". |
| # Adjusting for that here. |
| alias = re.sub("print_var", "pvar", called_func_name) |
| if local_debug: |
| print_varx("alias", alias, 0, debug_indent) |
| called_func_name = alias |
| func_regex = ".*" + called_func_name + "[ ]*\(" |
| |
| # arg_list_etc = re.sub(".*" + called_func_name, "", composite_line) |
| arg_list_etc = "(" + re.sub(func_regex, "", composite_line) |
| if local_debug: |
| print_varx("func_regex", func_regex, 0, debug_indent) |
| print_varx("called_func_name", called_func_name, 0, debug_indent) |
| print_varx("composite_line", composite_line, 0, debug_indent) |
| print_varx("arg_list_etc", arg_list_etc, 0, debug_indent) |
| |
| # Parse arg list... |
| # Initialize... |
| nest_level = -1 |
| arg_ix = 0 |
| args_list = [""] |
| for ix in range(0, len(arg_list_etc)): |
| char = arg_list_etc[ix] |
| # Set the nest_level based on whether we've encounted a parenthesis. |
| if char == "(": |
| nest_level += 1 |
| if nest_level == 0: |
| continue |
| elif char == ")": |
| nest_level -= 1 |
| if nest_level < 0: |
| break |
| |
| # If we reach a comma at base nest level, we are done processing an |
| # argument so we increment arg_ix and initialize a new args_list entry. |
| if char == "," and nest_level == 0: |
| arg_ix += 1 |
| args_list.append("") |
| continue |
| |
| # For any other character, we append it it to the current arg list |
| # entry. |
| args_list[arg_ix] += char |
| |
| # Trim whitespace from each list entry. |
| args_list = [arg.strip() for arg in args_list] |
| |
| if arg_num > len(args_list): |
| print_error("Programmer error - The caller has asked for the name of" + |
| " argument number \"" + str(arg_num) + "\" but there " + |
| "were only \"" + str(len(args_list)) + "\" args used:\n" + |
| sprint_varx("args_list", args_list)) |
| return |
| |
| argument = args_list[arg_num - 1] |
| |
| if local_debug: |
| print_varx("args_list", args_list, 0, debug_indent) |
| print_varx("argument", argument, 0, debug_indent) |
| |
| return argument |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_time(buffer=""): |
| |
| r""" |
| Return the time in the following format. |
| |
| Example: |
| |
| The following python code... |
| |
| sys.stdout.write(sprint_time()) |
| sys.stdout.write("Hi.\n") |
| |
| Will result in the following type of output: |
| |
| #(CDT) 2016/07/08 15:25:35 - Hi. |
| |
| Example: |
| |
| The following python code... |
| |
| sys.stdout.write(sprint_time("Hi.\n")) |
| |
| Will result in the following type of output: |
| |
| #(CDT) 2016/08/03 17:12:05 - Hi. |
| |
| The following environment variables will affect the formatting as |
| described: |
| NANOSECONDS This will cause the time stamps to be |
| precise to the microsecond (Yes, it |
| probably should have been named |
| MICROSECONDS but the convention was set |
| long ago so we're sticking with it). |
| Example of the output when environment |
| variable NANOSECONDS=1. |
| |
| #(CDT) 2016/08/03 17:16:25.510469 - Hi. |
| |
| SHOW_ELAPSED_TIME This will cause the elapsed time to be |
| included in the output. This is the |
| amount of time that has elapsed since the |
| last time this function was called. The |
| precision of the elapsed time field is |
| also affected by the value of the |
| NANOSECONDS environment variable. Example |
| of the output when environment variable |
| NANOSECONDS=0 and SHOW_ELAPSED_TIME=1. |
| |
| #(CDT) 2016/08/03 17:17:40 - 0 - Hi. |
| |
| Example of the output when environment variable NANOSECONDS=1 and |
| SHOW_ELAPSED_TIME=1. |
| |
| #(CDT) 2016/08/03 17:18:47.317339 - 0.000046 - Hi. |
| |
| Description of arguments. |
| buffer This will be appended to the formatted |
| time string. |
| """ |
| |
| global NANOSECONDS |
| global SHOW_ELAPSED_TIME |
| global sprint_time_last_seconds |
| |
| seconds = time.time() |
| loc_time = time.localtime(seconds) |
| nanoseconds = "%0.6f" % seconds |
| pos = nanoseconds.find(".") |
| nanoseconds = nanoseconds[pos:] |
| |
| time_string = time.strftime("#(%Z) %Y/%m/%d %H:%M:%S", loc_time) |
| if NANOSECONDS == "1": |
| time_string = time_string + nanoseconds |
| |
| if SHOW_ELAPSED_TIME == "1": |
| cur_time_seconds = seconds |
| math_string = "%9.9f" % cur_time_seconds + " - " + "%9.9f" % \ |
| sprint_time_last_seconds |
| elapsed_seconds = eval(math_string) |
| if NANOSECONDS == "1": |
| elapsed_seconds = "%11.6f" % elapsed_seconds |
| else: |
| elapsed_seconds = "%4i" % elapsed_seconds |
| sprint_time_last_seconds = cur_time_seconds |
| time_string = time_string + " - " + elapsed_seconds |
| |
| return time_string + " - " + buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_timen(buffer=""): |
| |
| r""" |
| Append a line feed to the buffer, pass it to sprint_time and return the |
| result. |
| """ |
| |
| return sprint_time(buffer + "\n") |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_error(buffer=""): |
| |
| r""" |
| Return a standardized error string. This includes: |
| - A time stamp |
| - The "**ERROR**" string |
| - The caller's buffer string. |
| |
| Example: |
| |
| The following python code... |
| |
| print(sprint_error("Oops.\n")) |
| |
| Will result in the following type of output: |
| |
| #(CDT) 2016/08/03 17:12:05 - **ERROR** Oops. |
| |
| Description of arguments. |
| buffer This will be appended to the formatted |
| error string. |
| """ |
| |
| return sprint_time() + "**ERROR** " + buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_varx(var_name, |
| var_value, |
| hex=0, |
| loc_col1_indent=col1_indent, |
| loc_col1_width=col1_width, |
| trailing_char="\n"): |
| |
| r""" |
| Print the var name/value passed to it. If the caller lets loc_col1_width |
| default, the printing lines up nicely with output generated by the |
| print_time functions. |
| |
| Note that the sprint_var function (defined below) can be used to call this |
| function so that the programmer does not need to pass the var_name. |
| sprint_var will figure out the var_name. The sprint_var function is the |
| one that would normally be used by the general user. |
| |
| For example, the following python code: |
| |
| first_name = "Mike" |
| print_time("Doing this...\n") |
| print_varx("first_name", first_name) |
| print_time("Doing that...\n") |
| |
| Will generate output like this: |
| |
| #(CDT) 2016/08/10 17:34:42.847374 - 0.001285 - Doing this... |
| first_name: Mike |
| #(CDT) 2016/08/10 17:34:42.847510 - 0.000136 - Doing that... |
| |
| This function recognizes several complex types of data such as dict, list |
| or tuple. |
| |
| For example, the following python code: |
| |
| my_dict = dict(one=1, two=2, three=3) |
| print_var(my_dict) |
| |
| Will generate the following output: |
| |
| my_dict: |
| my_dict[three]: 3 |
| my_dict[two]: 2 |
| my_dict[one]: 1 |
| |
| Description of arguments. |
| var_name The name of the variable to be printed. |
| var_value The value of the variable to be printed. |
| hex This indicates that the value should be |
| printed in hex format. It is the user's |
| responsibility to ensure that a var_value |
| contains a valid hex number. For string |
| var_values, this will be interpreted as |
| show_blanks which means that blank values |
| will be printed as "<blank>". |
| loc_col1_indent The number of spaces to indent the output. |
| loc_col1_width The width of the output column containing |
| the variable name. The default value of |
| this is adjusted so that the var_value |
| lines up with text printed via the |
| print_time function. |
| trailing_char The character to be used at the end of the |
| returned string. The default value is a |
| line feed. |
| """ |
| |
| # Determine the type |
| if type(var_value) in (int, float, bool, str, unicode) \ |
| or var_value is None: |
| # The data type is simple in the sense that it has no subordinate |
| # parts. |
| # Adjust loc_col1_width. |
| loc_col1_width = loc_col1_width - loc_col1_indent |
| # See if the user wants the output in hex format. |
| if hex: |
| if type(var_value) not in (int, long): |
| value_format = "%s" |
| if var_value is "": |
| var_value = "<blank>" |
| else: |
| value_format = "0x%08x" |
| else: |
| value_format = "%s" |
| format_string = "%" + str(loc_col1_indent) + "s%-" \ |
| + str(loc_col1_width) + "s" + value_format + trailing_char |
| return format_string % ("", var_name + ":", var_value) |
| else: |
| # The data type is complex in the sense that it has subordinate parts. |
| format_string = "%" + str(loc_col1_indent) + "s%s\n" |
| buffer = format_string % ("", var_name + ":") |
| loc_col1_indent += 2 |
| try: |
| length = len(var_value) |
| except TypeError: |
| pass |
| ix = 0 |
| loc_trailing_char = "\n" |
| type_is_dict = 0 |
| try: |
| if type(var_value) in (dict, collections.OrderedDict): |
| type_is_dict = 1 |
| except AttributeError: |
| pass |
| if not type_is_dict: |
| try: |
| if type(var_value) is DotDict: |
| type_is_dict = 1 |
| except NameError: |
| pass |
| if type_is_dict: |
| for key, value in var_value.iteritems(): |
| ix += 1 |
| if ix == length: |
| loc_trailing_char = trailing_char |
| buffer += sprint_varx(var_name + "[" + key + "]", value, hex, |
| loc_col1_indent, loc_col1_width, |
| loc_trailing_char) |
| elif type(var_value) in (list, tuple, set): |
| for key, value in enumerate(var_value): |
| ix += 1 |
| if ix == length: |
| loc_trailing_char = trailing_char |
| buffer += sprint_varx(var_name + "[" + str(key) + "]", value, |
| hex, loc_col1_indent, loc_col1_width, |
| loc_trailing_char) |
| elif type(var_value) is argparse.Namespace: |
| for key in var_value.__dict__: |
| ix += 1 |
| if ix == length: |
| loc_trailing_char = trailing_char |
| cmd_buf = "buffer += sprint_varx(var_name + \".\" + str(key)" \ |
| + ", var_value." + key + ", hex, loc_col1_indent," \ |
| + " loc_col1_width, loc_trailing_char)" |
| exec(cmd_buf) |
| else: |
| var_type = type(var_value).__name__ |
| func_name = sys._getframe().f_code.co_name |
| var_value = "<" + var_type + " type not supported by " + \ |
| func_name + "()>" |
| value_format = "%s" |
| loc_col1_indent -= 2 |
| # Adjust loc_col1_width. |
| loc_col1_width = loc_col1_width - loc_col1_indent |
| format_string = "%" + str(loc_col1_indent) + "s%-" \ |
| + str(loc_col1_width) + "s" + value_format + trailing_char |
| return format_string % ("", var_name + ":", var_value) |
| return buffer |
| |
| return "" |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_var(*args): |
| |
| r""" |
| Figure out the name of the first argument for you and then call |
| sprint_varx with it. Therefore, the following 2 calls are equivalent: |
| sprint_varx("var1", var1) |
| sprint_var(var1) |
| """ |
| |
| # Get the name of the first variable passed to this function. |
| stack_frame = 2 |
| caller_func_name = sprint_func_name(2) |
| if caller_func_name.endswith("print_var"): |
| stack_frame += 1 |
| var_name = get_arg_name(None, 1, stack_frame) |
| return sprint_varx(var_name, *args) |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_vars(*args): |
| |
| r""" |
| Sprint the values of one or more variables. |
| |
| Description of args: |
| args: |
| If the first argument is an integer, it will be interpreted to be the |
| "indent" value. |
| If the second argument is an integer, it will be interpreted to be the |
| "col1_width" value. |
| If the third argument is an integer, it will be interpreted to be the |
| "hex" value. |
| All remaining parms are considered variable names which are to be |
| sprinted. |
| """ |
| |
| if len(args) == 0: |
| return |
| |
| # Get the name of the first variable passed to this function. |
| stack_frame = 2 |
| caller_func_name = sprint_func_name(2) |
| if caller_func_name.endswith("print_vars"): |
| stack_frame += 1 |
| |
| parm_num = 1 |
| |
| # Create list from args (which is a tuple) so that it can be modified. |
| args_list = list(args) |
| |
| var_name = get_arg_name(None, parm_num, stack_frame) |
| # See if parm 1 is to be interpreted as "indent". |
| try: |
| if type(int(var_name)) is int: |
| indent = int(var_name) |
| args_list.pop(0) |
| parm_num += 1 |
| except ValueError: |
| indent = 0 |
| |
| var_name = get_arg_name(None, parm_num, stack_frame) |
| # See if parm 1 is to be interpreted as "col1_width". |
| try: |
| if type(int(var_name)) is int: |
| loc_col1_width = int(var_name) |
| args_list.pop(0) |
| parm_num += 1 |
| except ValueError: |
| loc_col1_width = col1_width |
| |
| var_name = get_arg_name(None, parm_num, stack_frame) |
| # See if parm 1 is to be interpreted as "hex". |
| try: |
| if type(int(var_name)) is int: |
| hex = int(var_name) |
| args_list.pop(0) |
| parm_num += 1 |
| except ValueError: |
| hex = 0 |
| |
| buffer = "" |
| for var_value in args_list: |
| var_name = get_arg_name(None, parm_num, stack_frame) |
| buffer += sprint_varx(var_name, var_value, hex, indent, loc_col1_width) |
| parm_num += 1 |
| |
| return buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def lprint_varx(var_name, |
| var_value, |
| hex=0, |
| loc_col1_indent=col1_indent, |
| loc_col1_width=col1_width, |
| log_level=getattr(logging, 'INFO')): |
| |
| r""" |
| Send sprint_varx output to logging. |
| """ |
| |
| logging.log(log_level, sprint_varx(var_name, var_value, hex, |
| loc_col1_indent, loc_col1_width, "")) |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def lprint_var(*args): |
| |
| r""" |
| Figure out the name of the first argument for you and then call |
| lprint_varx with it. Therefore, the following 2 calls are equivalent: |
| lprint_varx("var1", var1) |
| lprint_var(var1) |
| """ |
| |
| # Get the name of the first variable passed to this function. |
| stack_frame = 2 |
| caller_func_name = sprint_func_name(2) |
| if caller_func_name.endswith("print_var"): |
| stack_frame += 1 |
| var_name = get_arg_name(None, 1, stack_frame) |
| lprint_varx(var_name, *args) |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_dashes(indent=col1_indent, |
| width=80, |
| line_feed=1, |
| char="-"): |
| |
| r""" |
| Return a string of dashes to the caller. |
| |
| Description of arguements: |
| indent The number of characters to indent the |
| output. |
| width The width of the string of dashes. |
| line_feed Indicates whether the output should end |
| with a line feed. |
| char The character to be repeated in the output |
| string. |
| """ |
| |
| width = int(width) |
| buffer = " "*int(indent) + char*width |
| if line_feed: |
| buffer += "\n" |
| |
| return buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sindent(text="", |
| indent=0): |
| |
| r""" |
| Pre-pend the specified number of characters to the text string (i.e. |
| indent it) and return it. |
| |
| Description of arguments: |
| text The string to be indented. |
| indent The number of characters to indent the |
| string. |
| """ |
| |
| format_string = "%" + str(indent) + "s%s" |
| buffer = format_string % ("", text) |
| |
| return buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_call_stack(indent=0, |
| stack_frame_ix=0): |
| |
| r""" |
| Return a call stack report for the given point in the program with line |
| numbers, function names and function parameters and arguments. |
| |
| Sample output: |
| |
| ------------------------------------------------------------------------- |
| Python function call stack |
| |
| Line # Function name and arguments |
| ------ ------------------------------------------------------------------ |
| 424 sprint_call_stack () |
| 4 print_call_stack () |
| 31 func1 (last_name = 'walsh', first_name = 'mikey') |
| 59 /tmp/scr5.py |
| ------------------------------------------------------------------------- |
| |
| Description of arguments: |
| indent The number of characters to indent each |
| line of output. |
| stack_frame_ix The index of the first stack frame which |
| is to be returned. |
| """ |
| |
| buffer = "" |
| buffer += sprint_dashes(indent) |
| buffer += sindent("Python function call stack\n\n", indent) |
| buffer += sindent("Line # Function name and arguments\n", indent) |
| buffer += sprint_dashes(indent, 6, 0) + " " + sprint_dashes(0, 73) |
| |
| # Grab the current program stack. |
| current_stack = inspect.stack() |
| |
| # Process each frame in turn. |
| format_string = "%6s %s\n" |
| ix = 0 |
| for stack_frame in current_stack: |
| if ix < stack_frame_ix: |
| ix += 1 |
| continue |
| lineno = str(stack_frame[2]) |
| func_name = str(stack_frame[3]) |
| if func_name == "?": |
| # "?" is the name used when code is not in a function. |
| func_name = "(none)" |
| |
| if func_name == "<module>": |
| # If the func_name is the "main" program, we simply get the |
| # command line call string. |
| func_and_args = ' '.join(sys.argv) |
| else: |
| # Get the program arguments. |
| arg_vals = inspect.getargvalues(stack_frame[0]) |
| function_parms = arg_vals[0] |
| frame_locals = arg_vals[3] |
| |
| args_list = [] |
| for arg_name in function_parms: |
| # Get the arg value from frame locals. |
| arg_value = frame_locals[arg_name] |
| args_list.append(arg_name + " = " + repr(arg_value)) |
| args_str = "(" + ', '.join(map(str, args_list)) + ")" |
| |
| # Now we need to print this in a nicely-wrapped way. |
| func_and_args = func_name + " " + args_str |
| |
| buffer += sindent(format_string % (lineno, func_and_args), indent) |
| ix += 1 |
| |
| buffer += sprint_dashes(indent) |
| |
| return buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_executing(stack_frame_ix=None): |
| |
| r""" |
| Print a line indicating what function is executing and with what parameter |
| values. This is useful for debugging. |
| |
| Sample output: |
| |
| #(CDT) 2016/08/25 17:54:27 - Executing: func1 (x = 1) |
| |
| Description of arguments: |
| stack_frame_ix The index of the stack frame whose |
| function info should be returned. If the |
| caller does not specifiy a value, this |
| function will set the value to 1 which is |
| the index of the caller's stack frame. If |
| the caller is the wrapper function |
| "print_executing", this function will bump |
| it up by 1. |
| """ |
| |
| # If user wants default stack_frame_ix. |
| if stack_frame_ix is None: |
| func_name = sys._getframe().f_code.co_name |
| caller_func_name = sys._getframe(1).f_code.co_name |
| if caller_func_name.endswith(func_name[1:]): |
| stack_frame_ix = 2 |
| else: |
| stack_frame_ix = 1 |
| |
| stack_frame = inspect.stack()[stack_frame_ix] |
| |
| func_name = str(stack_frame[3]) |
| if func_name == "?": |
| # "?" is the name used when code is not in a function. |
| func_name = "(none)" |
| |
| if func_name == "<module>": |
| # If the func_name is the "main" program, we simply get the command |
| # line call string. |
| func_and_args = ' '.join(sys.argv) |
| else: |
| # Get the program arguments. |
| arg_vals = inspect.getargvalues(stack_frame[0]) |
| function_parms = arg_vals[0] |
| frame_locals = arg_vals[3] |
| |
| args_list = [] |
| for arg_name in function_parms: |
| # Get the arg value from frame locals. |
| arg_value = frame_locals[arg_name] |
| args_list.append(arg_name + " = " + repr(arg_value)) |
| args_str = "(" + ', '.join(map(str, args_list)) + ")" |
| |
| # Now we need to print this in a nicely-wrapped way. |
| func_and_args = func_name + " " + args_str |
| |
| return sprint_time() + "Executing: " + func_and_args + "\n" |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_pgm_header(indent=0, |
| linefeed=1): |
| |
| r""" |
| Return a standardized header that programs should print at the beginning |
| of the run. It includes useful information like command line, pid, |
| userid, program parameters, etc. |
| |
| Description of arguments: |
| indent The number of characters to indent each |
| line of output. |
| linefeed Indicates whether a line feed be included |
| at the beginning and end of the report. |
| """ |
| |
| loc_col1_width = col1_width + indent |
| |
| buffer = "" |
| if linefeed: |
| buffer = "\n" |
| |
| buffer += sindent(sprint_time() + "Running " + pgm_name + ".\n", indent) |
| buffer += sindent(sprint_time() + "Program parameter values, etc.:\n\n", |
| indent) |
| buffer += sprint_varx("command_line", ' '.join(sys.argv), 0, indent, |
| loc_col1_width) |
| # We want the output to show a customized name for the pid and pgid but |
| # we want it to look like a valid variable name. Therefore, we'll use |
| # pgm_name_var_name which was set when this module was imported. |
| buffer += sprint_varx(pgm_name_var_name + "_pid", os.getpid(), 0, indent, |
| loc_col1_width) |
| buffer += sprint_varx(pgm_name_var_name + "_pgid", os.getpgrp(), 0, indent, |
| loc_col1_width) |
| userid_num = str(os.geteuid()) |
| try: |
| username = os.getlogin() |
| except OSError: |
| if userid_num == "0": |
| username = "root" |
| else: |
| username = "?" |
| buffer += sprint_varx("uid", userid_num + " (" + username + |
| ")", 0, indent, loc_col1_width) |
| buffer += sprint_varx("gid", str(os.getgid()) + " (" + |
| str(grp.getgrgid(os.getgid()).gr_name) + ")", 0, |
| indent, loc_col1_width) |
| buffer += sprint_varx("host_name", socket.gethostname(), 0, indent, |
| loc_col1_width) |
| try: |
| DISPLAY = os.environ['DISPLAY'] |
| except KeyError: |
| DISPLAY = "" |
| buffer += sprint_varx("DISPLAY", DISPLAY, 0, indent, |
| loc_col1_width) |
| # I want to add code to print caller's parms. |
| |
| # __builtin__.arg_obj is created by the get_arg module function, |
| # gen_get_options. |
| try: |
| buffer += ga.sprint_args(__builtin__.arg_obj, indent) |
| except AttributeError: |
| pass |
| |
| if linefeed: |
| buffer += "\n" |
| |
| return buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_error_report(error_text="\n", |
| indent=2): |
| |
| r""" |
| Return a string with a standardized report which includes the caller's |
| error text, the call stack and the program header. |
| |
| Description of args: |
| error_text The error text to be included in the |
| report. The caller should include any |
| needed linefeeds. |
| indent The number of characters to indent each |
| line of output. |
| """ |
| |
| buffer = "" |
| buffer += sprint_dashes(width=120, char="=") |
| buffer += sprint_error(error_text) |
| buffer += "\n" |
| # Calling sprint_call_stack with stack_frame_ix of 0 causes it to show |
| # itself and this function in the call stack. This is not helpful to a |
| # debugger and is therefore clutter. We will adjust the stack_frame_ix to |
| # hide that information. |
| stack_frame_ix = 2 |
| caller_func_name = sprint_func_name(2) |
| if caller_func_name.endswith("print_error_report"): |
| stack_frame_ix += 1 |
| buffer += sprint_call_stack(indent, stack_frame_ix) |
| buffer += sprint_pgm_header(indent) |
| buffer += sprint_dashes(width=120, char="=") |
| |
| return buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_issuing(cmd_buf, |
| test_mode=0): |
| |
| r""" |
| Return a line indicating a command that the program is about to execute. |
| |
| Sample output for a cmd_buf of "ls" |
| |
| #(CDT) 2016/08/25 17:57:36 - Issuing: ls |
| |
| Description of args: |
| cmd_buf The command to be executed by caller. |
| test_mode With test_mode set, your output will look |
| like this: |
| |
| #(CDT) 2016/08/25 17:57:36 - (test_mode) Issuing: ls |
| |
| """ |
| |
| buffer = sprint_time() |
| if test_mode: |
| buffer += "(test_mode) " |
| buffer += "Issuing: " + cmd_buf + "\n" |
| |
| return buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint_pgm_footer(): |
| |
| r""" |
| Return a standardized footer that programs should print at the end of the |
| program run. It includes useful information like total run time, etc. |
| """ |
| |
| buffer = "\n" + sprint_time() + "Finished running " + pgm_name + ".\n\n" |
| |
| total_time = time.time() - start_time |
| total_time_string = "%0.6f" % total_time |
| |
| buffer += sprint_varx(pgm_name_var_name + "_runtime", total_time_string) |
| buffer += "\n" |
| |
| return buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprint(buffer=""): |
| |
| r""" |
| Simply return the user's buffer. This function is used by the qprint and |
| dprint functions defined dynamically below, i.e. it would not normally be |
| called for general use. |
| |
| Description of arguments. |
| buffer This will be returned to the caller. |
| """ |
| |
| return str(buffer) |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| def sprintn(buffer=""): |
| |
| r""" |
| Simply return the user's buffer with a line feed. This function is used |
| by the qprint and dprint functions defined dynamically below, i.e. it |
| would not normally be called for general use. |
| |
| Description of arguments. |
| buffer This will be returned to the caller. |
| """ |
| |
| buffer = str(buffer) + "\n" |
| |
| return buffer |
| |
| ############################################################################### |
| |
| |
| ############################################################################### |
| # In the following section of code, we will dynamically create print versions |
| # for each of the sprint functions defined above. So, for example, where we |
| # have an sprint_time() function defined above that returns the time to the |
| # caller in a string, we will create a corresponding print_time() function |
| # that will print that string directly to stdout. |
| |
| # It can be complicated to follow what's being creaed by the exec statement |
| # below. Here is an example of the print_time() function that will be created: |
| |
| # def print_time(*args): |
| # s_funcname = "s" + sys._getframe().f_code.co_name |
| # s_func = getattr(sys.modules[__name__], s_funcname) |
| # sys.stdout.write(s_func(*args)) |
| |
| # Here are comments describing the 3 lines in the body of the created function. |
| # Calculate the "s" version of this function name (e.g. if this function name |
| # is print_time, we want s_funcname to be "sprint_time". |
| # Put a reference to the "s" version of this function in s_func. |
| # Call the "s" version of this function passing it all of our arguments. |
| # Write the result to stdout. |
| |
| # func_names contains a list of all print functions which should be created |
| # from their sprint counterparts. |
| func_names = ['print_time', 'print_timen', 'print_error', 'print_varx', |
| 'print_var', 'print_vars', 'print_dashes', 'indent', |
| 'print_call_stack', 'print_func_name', 'print_executing', |
| 'print_pgm_header', 'print_issuing', 'print_pgm_footer', |
| 'print_error_report', 'print', 'printn'] |
| |
| for func_name in func_names: |
| if func_name == "print": |
| continue |
| # Create abbreviated aliases (e.g. spvar is an alias for sprint_var). |
| alias = re.sub("print_", "p", func_name) |
| pgm_definition_string = "s" + alias + " = s" + func_name |
| if gen_print_debug: |
| print(pgm_definition_string) |
| exec(pgm_definition_string) |
| |
| for func_name in func_names: |
| if func_name == "print_error" or func_name == "print_error_report": |
| output_stream = "stderr" |
| else: |
| output_stream = "stdout" |
| func_def = \ |
| [ |
| "def " + func_name + "(*args):", |
| " s_func_name = \"s\" + sys._getframe().f_code.co_name", |
| " s_func = getattr(sys.modules[__name__], s_func_name)", |
| " sys." + output_stream + ".write(s_func(*args))", |
| " sys." + output_stream + ".flush()" |
| ] |
| if func_name != "print": |
| pgm_definition_string = '\n'.join(func_def) |
| if gen_print_debug: |
| print(pgm_definition_string) |
| exec(pgm_definition_string) |
| |
| # Now define "q" versions of each print function. |
| func_def = \ |
| [ |
| "def q" + func_name + "(*args):", |
| " if __builtin__.quiet: return", |
| " s_func_name = \"s" + func_name + "\"", |
| " s_func = getattr(sys.modules[__name__], s_func_name)", |
| " sys." + output_stream + ".write(s_func(*args))", |
| " sys." + output_stream + ".flush()" |
| ] |
| |
| pgm_definition_string = '\n'.join(func_def) |
| if gen_print_debug: |
| print(pgm_definition_string) |
| exec(pgm_definition_string) |
| |
| # Now define "d" versions of each print function. |
| func_def = \ |
| [ |
| "def d" + func_name + "(*args):", |
| " if not __builtin__.debug: return", |
| " s_func_name = \"s" + func_name + "\"", |
| " s_func = getattr(sys.modules[__name__], s_func_name)", |
| " sys." + output_stream + ".write(s_func(*args))", |
| " sys." + output_stream + ".flush()" |
| ] |
| |
| pgm_definition_string = '\n'.join(func_def) |
| if gen_print_debug: |
| print(pgm_definition_string) |
| exec(pgm_definition_string) |
| |
| # Now define "l" versions of each print function. |
| func_def = \ |
| [ |
| "def l" + func_name + "(*args):", |
| " s_func_name = \"s" + func_name + "\"", |
| " s_func = getattr(sys.modules[__name__], s_func_name)", |
| " logging.log(getattr(logging, 'INFO'), s_func(*args))", |
| ] |
| |
| if func_name != "print_varx" and func_name != "print_var": |
| pgm_definition_string = '\n'.join(func_def) |
| if gen_print_debug: |
| print(pgm_definition_string) |
| exec(pgm_definition_string) |
| |
| if func_name == "print": |
| continue |
| |
| # Create abbreviated aliases (e.g. pvar is an alias for print_var). |
| alias = re.sub("print_", "p", func_name) |
| pgm_definition_string = alias + " = " + func_name |
| if gen_print_debug: |
| print(pgm_definition_string) |
| exec(pgm_definition_string) |
| |
| # Create abbreviated aliases (e.g. qpvar is an alias for qprint_var). |
| alias = re.sub("print_", "p", func_name) |
| pgm_definition_string = "q" + alias + " = q" + func_name |
| if gen_print_debug: |
| print(pgm_definition_string) |
| exec(pgm_definition_string) |
| |
| # Create abbreviated aliases (e.g. dpvar is an alias for dprint_var). |
| alias = re.sub("print_", "p", func_name) |
| pgm_definition_string = "d" + alias + " = d" + func_name |
| if gen_print_debug: |
| print(pgm_definition_string) |
| exec(pgm_definition_string) |
| |
| # Create abbreviated aliases (e.g. lpvar is an alias for lprint_var). |
| alias = re.sub("print_", "p", func_name) |
| pgm_definition_string = "l" + alias + " = l" + func_name |
| if gen_print_debug: |
| print(pgm_definition_string) |
| exec(pgm_definition_string) |
| |
| ############################################################################### |