[Tutor] cp file

[kamariah lamim]

i want to copy a file from current directory to another directory using 
shutil . However , it failed giving error:
File "/usr/lib/python2.2/shutil.py", line 29, in copyfile
    fdst = open(dst, 'wb')
IOError: [Errno 21] Is a directory: 'usr_20_0.3_0.2/'

could anyone trace my problem?
this is the code (simple enough as i want to test it before going into 
detailed ):
shutil.copy('disper.exe','usr_20_0.3_0.2/')

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