contributing: specify Python style
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/contributing.md b/contributing.md
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Coding style
------------
-Components of the OpenBMC sources should have consistent style.
+Components of the OpenBMC sources should have consistent style. If source is
+coming from another project, we choose to follow the existing style of the
+upstream project. Otherwise, conventions are chosen based on the language.
+
+### Python
+
+Python source should all conform to PEP8. This style is well established
+within the Python community and can be verified with the 'pep8' tool.
+
+https://www.python.org/dev/peps/pep-0008/
+
+### C
For C code, we typically use the Linux coding style, which is documented at: