Add Python 3.9 to build (open-telemetry#1441)

Signed-off-by: Gábor Lipták <gliptak@gmail.com>

Author: gliptak

.github/workflows/test.yml

@@ -20,22 +20,23 @@ jobs:
       py36: 3.6
       py37: 3.7
       py38: 3.8
+      py39: 3.9
       pypy3: pypy3
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false  # ensures the entire test matrix is run, even if one permutation fails
       matrix:
-        python-version: [ py35, py36, py37, py38, pypy3 ]
+        python-version: [ py35, py36, py37, py38, py39, pypy3 ]
         package: ["instrumentation", "core", "exporter"]
         os: [ ubuntu-latest ]
         include:
-          - python-version: py38
+          - python-version: py39
             package: "tracecontext"
             os: ubuntu-latest
-          - python-version: py38
+          - python-version: py39
             package: "mypy"
             os: ubuntu-latest
-          - python-version: py38
+          - python-version: py39
             package: "mypyinstalled"
             os: ubuntu-latest
           # py35-instrumentation segfaults on 18.04 so we instead run on 20.04
@@ -85,7 +86,7 @@ jobs:
           repository: open-telemetry/opentelemetry-python-contrib
           ref: ${{ env.CONTRIB_REPO_SHA }}
           path: opentelemetry-python-contrib
-      - name: Set up Python 3.8
+      - name: Set up Python
         uses: actions/setup-python@v2
         with:
           python-version: 3.8
@@ -106,12 +107,13 @@ jobs:
       py36: 3.6
       py37: 3.7
       py38: 3.8
+      py39: 3.9
       pypy3: pypy3
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false  # ensures the entire test matrix is run, even if one permutation fails
       matrix:
-        python-version: [ py35, py36, py37, py38, pypy3 ]
+        python-version: [ py35, py36, py37, py38, py39, pypy3 ]
         package: ["instrumentation", "exporter"]
         os: [ ubuntu-latest ]
         include:
@@ -166,10 +168,10 @@ jobs:
         with:
           repository: open-telemetry/opentelemetry-python
           path: opentelemetry-python-core
-      - name: Set up Python 3.8
+      - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install tox
         run: pip install -U tox
       - name: Cache tox environment

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://github.com/open-telemetry/opentelemetry-python/compare/v0.16b1...HEAD)
 
+- Add support for Python 3.9
+  ([#1441](https://github.com/open-telemetry/opentelemetry-python/pull/1441))
+
 ### Added
 - Add `fields` to propagators
   ([#1374](https://github.com/open-telemetry/opentelemetry-python/pull/1374))

dev-requirements.txt

@@ -2,7 +2,7 @@ pylint==2.4.4
 flake8~=3.7
 isort~=4.3
 black>=19.3b0,==19.*
-mypy==0.770
+mypy==0.790
 sphinx~=2.1
 sphinx-rtd-theme~=0.4
 sphinx-autodoc-typehints~=1.10.2

docs/examples/error_hander/error_handler_0/setup.cfg

@@ -29,6 +29,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

docs/examples/error_hander/error_handler_1/setup.cfg

@@ -29,6 +29,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

exporter/opentelemetry-exporter-opencensus/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

exporter/opentelemetry-exporter-otlp/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

exporter/opentelemetry-exporter-prometheus/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

exporter/opentelemetry-exporter-zipkin/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

instrumentation/opentelemetry-instrumentation-opentracing-shim/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5