AttributeError: 'module' object has no attribute 'lowercase'
2020 addendum: Note string.lowercase was for Python 2 only.
In Python 3, use string.ascii_lowercase instead of string.lowercase
Python 3.6.8 [GCC 4.2.1 Compatible Apple LLVM 10.0.1 (clang-1001.0.46.4)] on darwin>>> import string>>> string.lowercaseTraceback (most recent call last): File "<stdin>", line 1, in <module>AttributeError: module 'string' has no attribute 'lowercase'>>> string.ascii_lowercase'abcdefghijklmnopqrstuvwxyz'
After some discussion in the comments, it turned out (as it usually does when builtin modules suddenly seem to give AttributeErrors) that the problem was that another module named string was shadowing the builtin one.
One way to check this is to look at the __file__ attribute of the module, or just look at the repr itself:
>>> print string<module 'string' from '/usr/lib/python2.7/string.pyc'>if the from doesn't point to the right place, you've got the wrong module being read.
Solution: delete/rename the offending string.py/string.pyc files.