Add a Python example (#11)

I added the Python example based on https://codeberg.org/sail.black/serial-sphinx

Co-authored-by: julian <julian.kleber@sail.black>
Reviewed-on: https://codeberg.org/Codeberg-CI/examples/pulls/11
Co-authored-by: Julian Manuel Kleber <cap_jmk@noreply.codeberg.org>
Co-committed-by: Julian Manuel Kleber <cap_jmk@noreply.codeberg.org>

Python/.woodpecker.yml

@@ -0,0 +1,21 @@
+pipeline:
+  build:
+    image: python:${TAG}-buster
+    when:
+      event: pull_request
+      branch: main
+
+    commands:
+      - ls
+      - python -m venv venv 
+      - /bin/bash -c "source venv/bin/activate"
+      - python -m pip install --upgrade pip
+      - pip install -r requirements.txt
+      - pytest tests/
+
+matrix:
+  TAG:
+    - 3.7
+    - 3.9
+    - 3.8
+    - 3.10

README.md

@@ -13,8 +13,8 @@ Pull requests are accepted/welcome.
 | [Jekyll/jekyll.yml](Jekyll/jekyll.yml) | Markdown | Jekyll | CI step to build static website files and publish them to Codeberg Pages using Jekyll |
 | [Hugo/hugo.yml](Hugo/hugo.yml) | Markdown | Hugo | CI step to build static website files and publish them to Codeberg Pages with Hugo |
 | [Docker/kaniko.yml](Docker/kaniko.yml) | Dockerfile | [Kaniko][1] | Minimalistic CI pipeline with clear instructions to push a Docker image |
-| [Docker/buildx.yml](Docker/buildx.yml) | Dockerfile | [buildx][2] | Build and publish Docker images for multible architectures on codeberg |
-
+| [Docker/buildx.yml](Docker/buildx.yml) | Dockerfile | [buildx][2] | Build and publish Docker images for multiple architectures on codeberg |
+|[Python/.woodpecker.yml](Python)| Python | Python venv| Standard CI pipeline to test Python packages code on multiple Python distrubutions. For details check   [serial-sphinx](https://codeberg.org/sail.black/serial-sphinx.git)|
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