The most popular way of indenting Python is with spaces only. The second-most popular way is with tabs only.
For new projects, spaces-only are strongly recommended over tabs.
Function names:
...
mixedCase is allowed only in contexts where that's already the prevailing style (e.g. threading.py), to retain backwards compatibility.
http://www.python.org/dev/peps/pep-0008/#tabs-or-spaces
The most popular way of indenting Python is with spaces only. The second-most popular way is with tabs only. For new projects, spaces-only are strongly recommended over tabs.
Function names:
...
mixedCase is allowed only in contexts where that's already the prevailing style (e.g. threading.py), to retain backwards compatibility.