fix(python): ensure pip for python 3.10 (#173)

* fix(python): ensure pip for 3.10

* revert change for testing purposes

* restore fix

Author: parthea

python/googleapis/python-multi/Dockerfile

@@ -163,10 +163,13 @@ RUN wget --no-check-certificate -O /tmp/get-pip.py 'https://bootstrap.pypa.io/ge
   # https://github.com/docker-library/python/pull/100
     && [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ]
 
-# Ensure Pip for 3.9
-RUN python3.9 /tmp/get-pip.py
+# Ensure Pip for 3.10
+RUN python3.10 /tmp/get-pip.py
 RUN rm /tmp/get-pip.py
 
+# Test Pip
+RUN python3 -m pip
+
 # Install "virtualenv", since the vast majority of users of this image
 # will want it.
 RUN pip install --no-cache-dir virtualenv