Mandatory extension in config file

I was getting:

runixo:~/ $ inosync -v -c /home/runixo/properatiinosync         [10:37:10]
Traceback (most recent call last):
  File "/usr/bin/inosync", line 223, in <module>
    main()
  File "/usr/bin/inosync", line 193, in main
    load_config(options.config)
  File "/usr/bin/inosync", line 136, in load_config
    exec("import %s as __config__" % configfile)
  File "<string>", line 1, in <module>
ImportError: No module named properatiinosync

Until I noticed I had to append the .py extension to the config file