>>> k=os.listdir('C:\\')
>>> print [filemame for filename in k if 'Bin' in filename] 
Traceback (most recent call last):
  File "<input>", line 1, in <module>
NameError: name 'filemame' is not defined
>>> print [filemame for filename in k if 'Bin' in k] 
[]
>>> print [k for k in k if 'Bin' in k] 
['$Recycle.Bin']
>>> print [k for filename in k if 'Bin' in filename] 
[]
>>> print [filename for filename in k if 'Bin' in filename] 
[]
>>> print [e for e in k if 'Bin' in e] 
[]