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+# Use the latest 2.1 version of CircleCI pipeline process engine.
+# See: https://circleci.com/docs/2.0/configuration-reference
+version: 2.1
+
+# Orbs are reusable packages of CircleCI configuration that you may share across projects, enabling you to create encapsulated, parameterized commands, jobs, and executors that can be used across multiple projects.
+# See: https://circleci.com/docs/2.0/orb-intro/
+orbs:
+  # The python orb contains a set of prepackaged CircleCI configuration you can use repeatedly in your configuration files
+  # Orb commands and jobs help you with common scripting around a language/tool
+  # so you dont have to copy and paste it everywhere.
+  # See the orb documentation here: https://circleci.com/developer/orbs/orb/circleci/python
+  python: circleci/python@1.2
+
+# Define a job to be invoked later in a workflow.
+# See: https://circleci.com/docs/2.0/configuration-reference/#jobs
+jobs:
+  toxify:
+    docker:
+      - image: cimg/python:3.8
+    steps:
+      - checkout
+      - run:
+          command: |
+            pip install tox tox-pyenv
+            pyenv install 2.7.18
+            pyenv install 3.6.15
+            pyenv install 3.7.12
+            pyenv install 3.8.12
+            pyenv install 3.9.9
+      - run:
+          command: tox
+
+# Invoke jobs via workflows
+# See: https://circleci.com/docs/2.0/configuration-reference/#workflows
+workflows:
+  build-and-test:
+    jobs:
+      - toxify