How to specify the current user vairable name in the path to a file

I want to copy a file placed in the folder of the current user logged in.

so i have searched how to identify the user that is logged in, so i can point to the user folder in windows. for example i want to copy the file "hi.txt" in the Microsoft folder.

"C:\Documents and Settings\john\Application Data\Mic开发者_JS百科rosoft\hi.txt"

so when i move the script to another OS, i want it to identify the relevant user.

so i saw the option :

import getpass

user = getpass.getuser()

so now i want to place the variable "user" instead of pointing to "john" but how can i put a variable in the string of my path?

Thanks in advance, i'm new to programming and new to python.

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The home directory of the current user can be expanded using os.path.expanduser(). To open the file "whatever" in the current user's home directory, use

with open(os.path.expanduser("~/whatever")) as f:
    # whatever

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The follow codes are copied from python shell, perhaps it can help you.

>>> import getpass
>>> user = getpass.getuser()
>>> user
'yang'
>>> path = "C:\\Documents and Settings\\%s\\Application Data\\Microsoft\\hi.txt" % user
>>> print path
C:\Documents and Settings\yang\Application Data\Microsoft\hi.txt
>>> 

use the % operator.