Help on function mktemp in tempfile:

tempfile.mktemp = mktemp(suffix='', prefix='tmp', dir=None)
    User-callable function to return a unique temporary file name.  The
    file is not created.
    
    Arguments are as for mkstemp, except that the 'text' argument is
    not accepted.
    
    This function is unsafe and should not be used.  The file name
    refers to a file that did not exist at some point, but by the time
    you get around to creating it, someone else may have beaten you to
    the punch.