Add support for Python 3.9 (bp #5189)

azure-pipelines.yml

@@ -36,7 +36,7 @@ stages:
         - bash: |
             set -e
             python -m pip install --upgrade pip
-            pip install cibuildwheel==1.3.0
+            pip install cibuildwheel==1.6.3
             pip install -U twine
             cibuildwheel --output-dir wheelhouse .
         - task: PublishBuildArtifacts@1
@@ -68,7 +68,7 @@ stages:
             TWINE_PASSWORD: $(TWINE_PASSWORD)
     - job: 'macos'
       condition: startsWith(variables['Build.SourceBranch'], 'refs/tags')
-      pool: {vmImage: 'macOS-10.15'}
+      pool: {vmImage: 'macOS-latest'}
       variables:
         python.version: '3.7'
         CIBW_BEFORE_BUILD: pip install -U Cython
@@ -80,7 +80,7 @@ stages:
       - bash: |
           set -e
           python -m pip install --upgrade pip
-          pip install cibuildwheel==1.3.0
+          pip install cibuildwheel==1.6.3
           pip install -U twine
           cibuildwheel --output-dir wheelhouse .
       - task: PublishBuildArtifacts@1
@@ -105,12 +105,14 @@ stages:
         - {task: UsePythonVersion@0, inputs: {versionSpec: '3.7', architecture: x64}}
         - {task: UsePythonVersion@0, inputs: {versionSpec: '3.8', architecture: x86}}
         - {task: UsePythonVersion@0, inputs: {versionSpec: '3.8', architecture: x64}}
+        - {task: UsePythonVersion@0, inputs: {versionSpec: '3.9', architecture: x86}}
+        - {task: UsePythonVersion@0, inputs: {versionSpec: '3.9', architecture: x64}}
         - script: choco install vcpython27 -f -y
           displayName: Install Visual C++ for Python 2.7
         - bash: |
             set -e
             python -m pip install --upgrade pip
-            pip install cibuildwheel==1.3.0
+            pip install cibuildwheel==1.6.3
             pip install -U twine
             cibuildwheel --output-dir wheelhouse
         - task: PublishBuildArtifacts@1
@@ -124,7 +126,7 @@ stages:
     dependsOn: []
     jobs:
     - job: 'Linux_Tests'
-      pool: {vmImage: 'ubuntu-16.04'}
+      pool: {vmImage: 'ubuntu-latest'}
       strategy:
         matrix:
           Python37:
@@ -154,7 +156,7 @@ stages:
             source test-job/bin/activate
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt .
-            pip install "qiskit-ibmq-provider" "qiskit-aer" "z3-solver" -c constraints.txt
+            pip install "qiskit-aer" "z3-solver" -c constraints.txt
             python setup.py build_ext --inplace
             sudo apt install -y graphviz
             pip check
@@ -192,7 +194,7 @@ stages:
             testResultsFiles: '**/test-*.xml'
             testRunTitle: 'Test results for Linux Python $(python.version)'
     - job: 'Lint'
-      pool: {vmImage: 'ubuntu-16.04'}
+      pool: {vmImage: 'ubuntu-latest'}
       strategy:
         matrix:
           Python37:
@@ -220,7 +222,7 @@ stages:
             source test-job/bin/activate
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" "qiskit-aer" -c constraints.txt
+            pip install "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
           displayName: 'Install dependencies'
         - bash: |
@@ -232,7 +234,7 @@ stages:
             reno lint
           displayName: 'Style and lint'
     - job: 'Docs'
-      pool: {vmImage: 'ubuntu-16.04'}
+      pool: {vmImage: 'ubuntu-latest'}
       strategy:
         matrix:
           Python37:
@@ -278,7 +280,7 @@ stages:
             Parallel: true
             ParallelCount: 8
     - job: 'MacOS_Catalina_Tests'
-      pool: {vmImage: 'macOS-10.15'}
+      pool: {vmImage: 'macOS-latest'}
       strategy:
         matrix:
           Python37:
@@ -308,7 +310,7 @@ stages:
             source test-job/bin/activate
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" "qiskit-aer" -c constraints.txt
+            pip install "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
             pip check
           displayName: 'Install dependencies'
@@ -348,7 +350,7 @@ stages:
     condition: and(succeeded('Lint_and_Tests'), not(startsWith(variables['Build.SourceBranch'], 'refs/tags')))
     jobs:
     - job: 'Windows_Tests'
-      pool: {vmImage: 'vs2017-win2016'}
+      pool: {vmImage: 'windows-latest'}
       strategy:
         matrix:
           Python36:
@@ -357,6 +359,8 @@ stages:
             python.version: '3.7'
           Python38:
             python.version: '3.8'
+          Python39:
+            python.version: '3.9'
       variables:
         QISKIT_SUPPRESS_PACKAGING_WARNINGS: Y
         QISKIT_TEST_CAPTURE_STREAMS: 1
@@ -372,7 +376,7 @@ stages:
             source test-job/Scripts/activate
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" "qiskit-aer" "z3-solver" -c constraints.txt
+            pip install "z3-solver" -c constraints.txt
             python setup.py build_ext --inplace
             pip check
           displayName: 'Install dependencies'
@@ -409,13 +413,15 @@ stages:
             testResultsFiles: '**/test-*.xml'
             testRunTitle: 'Test results for Windows Python $(python.version)'
     - job: 'Linux_Tests'
-      pool: {vmImage: 'ubuntu-16.04'}
+      pool: {vmImage: 'ubuntu-latest'}
       strategy:
         matrix:
           Python36:
             python.version: '3.6'
           Python38:
             python.version: '3.8'
+          Python39:
+            python.version: '3.9'
       variables:
         QISKIT_SUPPRESS_PACKAGING_WARNINGS: Y
         PIP_CACHE_DIR: $(Pipeline.Workspace)/.pip
@@ -441,7 +447,7 @@ stages:
             source test-job/bin/activate
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" "qiskit-aer" "z3-solver" -c constraints.txt
+            pip install "qiskit-aer" "z3-solver" -c constraints.txt
             python setup.py build_ext --inplace
             sudo apt install -y graphviz
             pip check
@@ -479,13 +485,15 @@ stages:
             testResultsFiles: '**/test-*.xml'
             testRunTitle: 'Test results for Linux Python $(python.version)'
     - job: 'MacOS_Catalina_Tests'
-      pool: {vmImage: 'macOS-10.15'}
+      pool: {vmImage: 'macOS-latest'}
       strategy:
         matrix:
           Python36:
             python.version: '3.6'
           Python38:
             python.version: '3.8'
+          Python39:
+            python.version: '3.9'
       variables:
         QISKIT_SUPPRESS_PACKAGING_WARNINGS: Y
         PIP_CACHE_DIR: $(Pipeline.Workspace)/.pip
@@ -511,7 +519,6 @@ stages:
             source test-job/bin/activate
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
             pip check
           displayName: 'Install dependencies'

qiskit/test/base.py

@@ -37,7 +37,7 @@
     HAS_FIXTURES = False
 
 from .runtest import RunTest, MultipleExceptions
-from .utils import Path, _AssertNoLogsContext, setup_test_logging
+from .utils import Path, setup_test_logging
 
 
 __unittest = True  # Allows shorter stack trace for .assertDictAlmostEqual
@@ -98,14 +98,6 @@ def _get_resource_path(filename, path=Path.TEST):
         """
         return os.path.normpath(os.path.join(path.value, filename))
 
-    def assertNoLogs(self, logger=None, level=None):
-        """Assert that no message is sent to the specified logger and level.
-
-        Context manager to test that no message is sent to the specified
-        logger and level (the opposite of TestCase.assertLogs()).
-        """
-        return _AssertNoLogsContext(self, logger, level)
-
     def assertDictAlmostEqual(self, dict1, dict2, delta=None, msg=None,
                               places=None, default_value=0):
         """Assert two dictionaries with numeric values are almost equal.

qiskit/test/utils.py

@@ -14,7 +14,6 @@
 
 import logging
 import os
-import unittest
 from enum import Enum
 from itertools import product
 
@@ -66,32 +65,6 @@ def setup_test_logging(logger, log_level, filename):
     logger.setLevel(level)
 
 
-class _AssertNoLogsContext(unittest.case._AssertLogsContext):
-    """A context manager used to implement TestCase.assertNoLogs()."""
-
-    # pylint: disable=inconsistent-return-statements
-    def __exit__(self, exc_type, exc_value, tb):
-        """
-        This is a modified version of TestCase._AssertLogsContext.__exit__(...)
-        """
-        self.logger.handlers = self.old_handlers
-        self.logger.propagate = self.old_propagate
-        self.logger.setLevel(self.old_level)
-        if exc_type is not None:
-            # let unexpected exceptions pass through
-            return False
-
-        if self.watcher.records:
-            msg = 'logs of level {} or higher triggered on {}:\n'.format(
-                logging.getLevelName(self.level), self.logger.name)
-            for record in self.watcher.records:
-                msg += 'logger %s %s:%i: %s\n' % (record.name, record.pathname,
-                                                  record.lineno,
-                                                  record.getMessage())
-
-            self._raiseFailure(msg)
-
-
 class Case(dict):
     """<no description>"""
     pass

releasenotes/notes/python39-617f3ed823e63cfe.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Python 3.9 support has been added in this release. You can now run Qiskit
+    Terra using Python 3.9. 

setup.py

@@ -97,6 +97,7 @@
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Scientific/Engineering",
     ],
     keywords="qiskit sdk quantum",

test/python/tools/jupyter/test_notebooks.py

@@ -71,8 +71,8 @@ def _execute_notebook(self, filename):
             notebook, {'metadata': {'path': self.execution_path}})
 
     @unittest.skipIf(
-        sys.version_info[0] == 3 and sys.version_info[1] == 8 and
-        sys.platform != 'linux', 'Fails with Python 3.8 on osx and windows')
+        sys.version_info >= (3, 8) and
+        sys.platform != 'linux', 'Fails with Python >=3.8 on osx and windows')
     def test_jupyter_jobs_pbars(self):
         """Test Jupyter progress bars and job status functionality"""
         self._execute_notebook(self._get_resource_path(