Python command gives weird result!

[yahyasheikhnejad]

I know maybe my question is not relevant but please help!
print( os.path.isfile(os.getcwd()) )
gives False!
and
print(os.path.isfile('C:/Windows'))
print(os.path.isfile('C:\Windows'))
False
False
how could it be possible?
would you please help in this regards?