taskcluster/taskgraph/util/python_path.py
author Dustin J. Mitchell <dustin@mozilla.com>
Wed, 29 Jun 2016 22:12:09 +0000
changeset 329467 2393f903d0a732960e73ae00489d0758d5f526f0
permissions -rw-r--r--
Bug 1281004: factor out searching for python objects by path; r=gps MozReview-Commit-ID: 4ioEqPA7BQk

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

from __future__ import absolute_import, print_function, unicode_literals


def find_object(path):
    """
    Find a Python object given a path of the form <modulepath>:<objectpath>.
    Conceptually equivalent to

        def find_object(modulepath, objectpath):
            import <modulepath> as mod
            return mod.<objectpath>
    """
    if path.count(':') != 1:
        raise ValueError(
            'python path {!r} does not have the form "module:object"'.format(path))

    modulepath, objectpath = path.split(':')
    obj = __import__(modulepath)
    for a in modulepath.split('.')[1:]:
        obj = getattr(obj, a)
    for a in objectpath.split('.'):
        obj = getattr(obj, a)
    return obj