python - pip install --upgrade sqlalchemy gives maximum recursion depth exceeded -

i've tried pip install --upgrade sqlalchemy, python2.7 setup.py install, , after deleting sqlalchemy folder in site-packages, i've tried pip install sqlalchemy. give "runtimeerror: maximum recursion depth exceeded in cmp".

  file "c:\python27\lib\ntpath.py", line 200, in splitext return genericpath._splitext(p, sep, altsep, extsep)   file "c:\python27\lib\genericpath.py", line 102, in _splitext     sepindex = max(sepindex, altsepindex) runtimeerror: maximum recursion depth exceeded in cmp 

i have tried run setup.py v0.9 , same result. tried adding line setup.py set max recursion 10000 , python crashes.

edit: traceback long repetition of this:

 file "c:\python27\lib\site-packages\distribute-0.6.28-py2.7.egg\setuptools\dist.py", line 225, in __init__     _distribution.__init__(self,attrs)   file "c:\python27\lib\distutils\dist.py", line 287, in __init__     self.finalize_options()   file "c:\python27\lib\site-packages\distribute-0.6.28-py2.7.egg\setuptools\dist.py", line 257, in finalize_options     ep.require(installer=self.fetch_build_egg)   file "c:\python27\lib\site-packages\distribute-0.6.28-py2.7.egg\pkg_resources.py", line 2029, in require     working_set.resolve(self.dist.requires(self.extras),env,installer))   file "c:\python27\lib\site-packages\distribute-0.6.28-py2.7.egg\pkg_resources.py", line 580, in resolve     dist = best[req.key] = env.best_match(req, self, installer)   file "c:\python27\lib\site-packages\distribute-0.6.28-py2.7.egg\pkg_resources.py", line 825, in best_match     return self.obtain(req, installer) # try , download/install   file "c:\python27\lib\site-packages\distribute-0.6.28-py2.7.egg\pkg_resources.py", line 837, in obtain     return installer(requirement)   file "c:\python27\lib\site-packages\distribute-0.6.28-py2.7.egg\setuptools\dist.py", line 272, in fetch_build_egg     dist = self.__class__({'script_args':['easy_install']}) {repeat until max recursion} 

looks "distribute" (v0.6xxx) out of date. ran

pip install --upgrade distribute  

and installed 0.7.3.

then ran pip install sqlalchemy , installed.

same problem encountered installing other packages.