Python: move files to creation date named directories

move.py

#!/usr/bin/python3
import os, time, shutil, sys, calendar

dir = sys.argv[1]
os.chdir(dir)

for f in filter(os.path.isfile, os.listdir(os.curdir):
    ftime = time.gmtime(os.path.getmtime(f))
    ctime_dir = "{1}{0}{2}".format(os.sep,
                ftime.tm_year,
                calendar.month_name[ftime.tm_mon])
    os.makedirs(ctime_dir,exist_ok=True)
    dst = os.path.join(ctime_dir, f)
    shutil.move(f, dst);
    print('File {0} has been moved to {1}'.format(f,dst))

Changing to

1. Ignore Directories in the current path
2. Use platform agnostic os.path.join and os.sep for path operations
3. Use str.format() for string operations.