问题
Versions
- Python : 2.7.14
- six : 1.9.0 & 1.11.0(tried on both)
- OS : mac(10.13.3) & ubuntu(16.04) [tried on both]
Error
from six.moves import http_client
ImportError: No module named moves
Description
In flask application which is running on google app engine while running it on local system using dev_appserver.py getting above error while importing from six.moves import http_client
What I have tried
After importing six have tried dir(six) which shows that moves is there in list but it's not able to import it which is very strange.
Output of six.__version__: 1.11.0
Output if dir(six)
['/opt/tribes-backend', '/opt/tribes-backend/lib1', '/usr/lib/google-cloud-sdk/platform/google_appengine', '/usr/lib/google-cloud-sdk/platform/google_appengine', '/usr/lib/python2.7', '/usr/lib/python2.7/lib-dynload', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/ssl-2.7.11', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/grpcio-1.0.0', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/six-1.9.0', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/protobuf-3.0.0', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/enum-0.9.23', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/futures-3.0.5', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/setuptools-36.6.0', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/protorpc-1.0', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/pytz-2017.2', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/webapp2-2.3', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/webob-1.1.1', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/werkzeug-0.11.10', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/yaml-3.10', '/usr/local/lib/python2.7/dist-packages/enum', '/usr/lib/google-cloud-sdk/platform/google_appengine/lib/concurrent/concurrent', '/usr/local/lib/python2.7/dist-packages/concurrent', '/usr/local/lib/python2.7/dist-packages/google', '/usr/lib/google-cloud-sdk/platform/google_appengine/google'] ['BytesIO', 'Iterator', 'MAXSIZE', 'Module_six_moves_urllib', 'Module_six_moves_urllib_error', 'Module_six_moves_urllib_parse', 'Module_six_moves_urllib_request', 'Module_six_moves_urllib_response', 'Module_six_moves_urllib_robotparser', 'MovedAttribute', 'MovedModule', 'PY2', 'PY3', 'StringIO', '_LazyDescr', '_LazyModule', '_MovedItems', '_SixMetaPathImporter', 'author', 'builtins', 'doc', 'file', 'name', 'package', 'path', 'version', '_add_doc', '_assertCountEqual', '_assertRaisesRegex', '_assertRegex', '_func_closure', '_func_code', '_func_defaults', '_func_globals', '_import_module', '_importer', '_meth_func', '_meth_self', '_moved_attributes', '_print', '_urllib_error_moved_attributes', '_urllib_parse_moved_attributes', '_urllib_request_moved_attributes', '_urllib_response_moved_attributes', '_urllib_robotparser_moved_attributes', 'absolute_import', 'add_metaclass', 'add_move', 'advance_iterator', 'assertCountEqual', 'assertRaisesRegex', 'assertRegex', 'b', 'binary_type', 'byte2int', 'callable', 'class_types', 'create_bound_method', 'exec_', 'functools', 'get_function_closure', 'get_function_code', 'get_function_defaults', 'get_function_globals', 'get_method_function', 'get_method_self', 'get_unbound_function', 'indexbytes', 'int2byte', 'integer_types', 'iterbytes', 'iteritems', 'iterkeys', 'iterlists', 'itertools', 'itervalues', 'moves', 'next', 'operator', 'print_', 'python_2_unicode_compatible', 'raise_from', 'remove_move', 'reraise', 'string_types', 'sys', 'text_type', 'types', 'u', 'unichr', 'viewitems', 'viewkeys', 'viewvalues', 'with_metaclass', 'wraps'].
As it can be seen from above output moves inside six still giving error while importing it.
Spent a lot of time on this and no solution till now any help would be greatly appreciated here. :(
UPDATE1
Error stacktrace :-
from google.cloud.datastore import helpers
File "/opt/tribes-backend/denv/local/lib/python2.7/site-packages/google/cloud/datastore/helpers.py", line 27, in <module>
from google.cloud._helpers import _datetime_to_pb_timestamp
File "/opt/tribes-backend/denv/local/lib/python2.7/site-packages/google/cloud/_helpers.py", line 30, in <module>
from six.moves import http_client
ImportError: No module named moves
回答1:
Based on follow up with google support team have figured out that communicating with datastore using google-cloud-datastore is deprecated
instead using ndb for communicating datastore is the way to go.
Updated documentation stating deprecation using client datastore library is documented here
Documentation to getting started with ndb client library in python is documented here
回答2:
In some cases if you want to use some python pure libraries, like six, available in your applications you will need to use third-party libraries.
Follow the instructions here, to add a third-party library, until the command pip install -t lib -r requirements.txt. In your requirements.txt file just add six==1.11.0.
It solved the problem for me.
来源：https://stackoverflow.com/questions/49188151/importerror-no-module-named-moves