Not python, but in Java, identifiers can get quite long. e.g.: "localizableRUNTIME_MODELER_PORTNAME_SERVICENAME_NAMESPACE_MISMATCH" is the longest at 66 characters.

As for python, some fancy list comprehensions get rather long rather quickly. Especially if itertools are involved as you izip, etc. Or using useful variable names (i.e. not 'fcnt', 'tcnt') while destructuring as in this example from pyspark/mllib:

(failure_count, test_count) = doctest.testmod(globs=globs, optionflags=doctest.ELLIPSIS)

I adapted your grep to:

  find . -name '*.py' | xargs grep -n '^ *.\{80\}'

So leading indentation doesn't mess with the results.