app.py

#!/usr/bin/env python3
import yaml
import click
from pprint import pprint
from plugins import github, gitlab, pagure

plugins = {
    "github": github.get_pull_requests,
    "pagure": pagure.get_pull_requests,
    # "gitlab": gitlab.get_pull_requests
}

@click.command()
@click.option('--site', default='config', help='Please enter the sitename to list activity, e.g. github')
@click.option('--username', default='config', help='Please enter username to list activity, e.g. HariSadu')
@click.option('--repo', default='config', help='Please enter repository name to list activity, e.g. helloworld')
def execute_board(site,  username, repo):
    '''Take Arguments from command line OR Read configuration files, which is YAML format'''
    #print (site)
    #print (username) 
    if username == 'config' and repo == 'config':
          print ("The Application will read username and code sites from configuraiton file")
          with open('config.yml', 'r') as f:
             conf = yaml.load(f)

    # Expect site, username and repo comming from command line 
    #data = get_pull_requests('walters', 'fedora-atomic')
    # data = get_pull_requests(username, repo)
    # print (data)

    if site in plugins.keys():
        data = plugins[site](username, repo)
        pprint(data)
    
    else:
        print("Couldnt find Plugin for site \"%s\"" % site)

def getComments(site, username):
     pass

def getPR(site, username):
     pass 


if __name__ == '__main__':
    click.echo("Welcome to Code Review System\n")
    try:
        execute_board()
    except yaml.YAMLError as exc:
        print(exc)