Create config with fabric example

fabfile_config.py

from fabric.contrib.files import append, contains, exists


@task
def config_insert_line():
    insert_this = """something"""
    if exists('somefile.conf'):
        if not contains('somefile.conf', insert_this):
            append('somefile.conf', insert_this)
    else:
        append('somefile.conf', insert_this)