Fix "Complexity" issue in noipy/main.py

[pv8]

Cyclomatic complexity is too high in function execute_update. (21)

• main.py (Lines 59 to 63)

def execute_update(args):
    """Execute the update based on command line args and returns a dictionary
    with 'execution result, ''response code', 'response info' and
    'process friendly message'.
    """

   (...)

https://codeclimate.com/github/pv8/noipy/noipy/main.py#issue_5730a7f72cf9fb00010770f2