1 def remove_extension(file_name):

     2     """

     3     Remove 3 letters and 4 letters extension from filename

     4     

     5     >>> remove_extension('my file.tex')

     6     'my file'

     7     >>> remove_extension('my file.html')

     8     'my file'

     9     >>> remove_extension('my file')

    10     'my file'

    11     """

    12     for point_loc in [3,4]:

    13         if len(file_name)>point_loc and file_name[-point_loc-1] == '.':

    14             return file_name[:-point_loc-1] 

    15     return file_name

    16     

    17 

    18 if __name__ == "__main__":

    19     import doctest

    20     doctest.testmod()