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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def _format_issue(issue):
    '''
    Helper function to format API return information into a more manageable
    and useful dictionary for issue information.

    issue
        The issue to format.
    '''
    ret = {'id': issue.get('id'),
           'issue_number': issue.get('number'),
           'state': issue.get('state'),
           'title': issue.get('title'),
           'user': issue.get('user').get('login'),
           'html_url': issue.get('html_url')}

    assignee = issue.get('assignee')
    if assignee:
        assignee = assignee.get('login')

    labels = issue.get('labels')
    label_names = []
    for label in labels:
        label_names.append(label.get('name'))

    milestone = issue.get('milestone')
    if milestone:
        milestone = milestone.get('title')

    ret['assignee'] = assignee
    ret['labels'] = label_names
    ret['milestone'] = milestone

    return ret