"set sublime tab_size for python" task doesn't work if 'Python.sublime-settings' file doesn't exist

[radomirbosak]

TASK [sublime_text : set sublime tab_size for python] **************************
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: IOError: [Errno 2] No such file or directory: '/home/user/.config/sublime-text-3/Packages/User/Python.sublime-settings'
fatal: [localhost]: FAILED! => {"changed": false, "failed": true, "module_stderr": "Traceback (most recent call last):\n  File \"/tmp/ansible_7XazUa/ansible_module_json_edit.py\", line 121, in <module>\n    main()\n  File \"/tmp/ansible_7XazUa/ansible_module_json_edit.py\", line 105, in main\n    json_dict = read_dict(filename)\n  File \"/tmp/ansible_7XazUa/ansible_module_json_edit.py\", line 78, in read_dict\n    file_cont = open(filename, 'r').read()\nIOError: [Errno 2] No such file or directory: '/home/user/.config/sublime-text-3/Packages/User/Python.sublime-settings'\n", "module_stdout": "", "msg": "MODULE FAILURE"}
	to retry, use: --limit @/home/user/repos/fedora-setup/main.retry

[radomirbosak]

This is the python traceback printed prettier:

Traceback (most recent call last):
  File "/tmp/ansible_7XazUa/ansible_module_json_edit.py", line 121, in <module>
    main()
  File "/tmp/ansible_7XazUa/ansible_module_json_edit.py", line 105, in main
    json_dict = read_dict(filename)
  File "/tmp/ansible_7XazUa/ansible_module_json_edit.py", line 78, in read_dict
    file_cont = open(filename, 'r').read()
IOError: [Errno 2] No such file or directory: '/home/user/.config/sublime-text-3/Packages/User/Python.sublime-settings'

The json module should be changed to handle a non-existent file.