refactor namespace package - cleanup opencensus root folder (census-instrumentation#493)

* refactor namespace package - cleanup opencensus root folder

* remove TODO comment

* exclude tests folder from package

* rename __version__.py to version.py

Author: reyang

opencensus/__init__.py

@@ -1,20 +1 @@
-# Copyright 2017, OpenCensus Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-try:
-    import pkg_resources
-    pkg_resources.declare_namespace(__name__)
-except ImportError:  # pragma: NO COVER
-    import pkgutil
-    __path__ = pkgutil.extend_path(__path__, __name__)
+__path__ = __import__('pkgutil').extend_path(__path__, __name__)

opencensus/__version__.py renamed to opencensus/common/version.py

@@ -1,4 +1,4 @@
-# Copyright 2018, OpenCensus Authors
+# Copyright 2019, OpenCensus Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

opencensus/stats/exporters/stackdriver_exporter.py

@@ -23,11 +23,11 @@
 from google.api_core.gapic_v1 import client_info
 from google.cloud import monitoring_v3
 
-from opencensus.__version__ import __version__
 from opencensus.common import utils
 from opencensus.common.monitored_resource_util.monitored_resource_util \
     import MonitoredResourceUtil
 from opencensus.common.transports import async_
+from opencensus.common.version import __version__
 from opencensus.stats import aggregation
 from opencensus.stats import measure
 from opencensus.stats.exporters import base

opencensus/trace/exporters/ocagent/trace_exporter.py

@@ -19,8 +19,8 @@
 import os
 import socket
 
-from opencensus.__version__ import __version__
 from opencensus.common.transports import sync
+from opencensus.common.version import __version__
 from opencensus.trace.exporters import base
 from opencensus.trace.exporters.gen.opencensus.agent.common.v1 \
     import common_pb2

opencensus/trace/exporters/stackdriver_exporter.py

@@ -17,10 +17,10 @@
 
 from google.cloud.trace.client import Client
 
-from opencensus.__version__ import __version__
 from opencensus.common.monitored_resource_util.monitored_resource_util \
     import MonitoredResourceUtil
 from opencensus.common.transports import sync
+from opencensus.common.version import __version__
 from opencensus.trace import attributes_helper
 from opencensus.trace import span_data
 from opencensus.trace.attributes import Attributes

setup.py

@@ -26,7 +26,7 @@
     'google-api-core >= 1.0.0, < 2.0.0',
 ]
 
-exec(open("opencensus/__version__.py").read())
+exec(open("opencensus/common/version.py").read())
 setup(
     name='opencensus',
     version=__version__,  # noqa
@@ -51,6 +51,6 @@
     install_requires=install_requires,
     extras_require=extras,
     license='Apache-2.0',
-    packages=find_packages(),
+    packages=find_packages(exclude=('tests',)),
     namespace_packages=[],
     url='https://github.com/census-instrumentation/opencensus-python')

tests/unit/stats/exporters/test_stackdriver_stats.py

@@ -18,7 +18,7 @@
 
 from google.cloud import monitoring_v3
 
-from opencensus.__version__ import __version__
+from opencensus.common.version import __version__
 from opencensus.stats import aggregation as aggregation_module
 from opencensus.stats import aggregation_data as aggregation_data_module
 from opencensus.stats import execution_context

tests/unit/trace/exporters/ocagent/test_trace_exporter.py

@@ -19,7 +19,7 @@
 import socket
 import unittest
 
-from opencensus.__version__ import __version__
+from opencensus.common.version import __version__
 from opencensus.trace import span_context as span_context_module
 from opencensus.trace import span_data as span_data_module
 from opencensus.trace.exporters.gen.opencensus.trace.v1 import trace_config_pb2

tests/unit/trace/exporters/test_stackdriver_exporter.py

@@ -16,7 +16,7 @@
 
 import mock
 
-from opencensus.__version__ import __version__
+from opencensus.common.version import __version__
 from opencensus.trace import span_context
 from opencensus.trace import span_data as span_data_module
 from opencensus.trace.exporters import stackdriver_exporter