title: python packages are not installed throughCI/CD pipelines,import error , package not found
body: <p><strong>Introduction and Explaination</strong></p>
  <p>i am trying deploy my code to azure function app (linux based , python code ) through CI.CD pipelines. at first it worked fine but after few deployments, i am import error , library not found . and when i check the artifacts, required files of libraries are missing. i didnt changed anything in azure-pipelines.yml file .In azure-pipelines.yml i have added script for python to install libraries from requirements.txt. does anyone have any idea about it</p>
  <p><strong>What I have tried</strong></p>
  <p>i have also added those bash commands in yml file but same issue.</p>
  <pre><code> bash: |
  cd sub_folder
  python3.6 -m venv worker_venv
  source worker_venv/bin/activate
  pip3.6 install setuptools
  pip3.6 install -r requirements.txt
  displayName: 'Install application dependencies'.
  </code></pre>
  <p><strong>Issue</strong></p>
  <p>one more issue i am seeing is ,</p>
  <pre><code>Result: Failure Exception: ImportError: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /home/site/wwwroot/worker_venv/lib/python3.6/site-packages/pyodbc.cpython-36m-x86_64-linux-gnu.so). Troubleshooting Guide: https://aka.ms/functions-modulenotfound Stack: File &quot;/azure-functions-host/workers/python/3.6/LINUX/X64/azure_functions_worker/dispatcher.py&quot;, line 275, in _handle__function_load_request func_request.metadata.entry_point) File &quot;/azure-functions-host/workers/python/3.6/LINUX/X64/azure_functions_worker/utils/wrappers.py&quot;, line 34, in call raise extend_exception_message(e, message) File &quot;/azure-functions-host/workers/python/3.6/LINUX/X64/azure_functions_worker/utils/wrappers.py&quot;, line 32, in call return func(*args, **kwargs) File &quot;/azure-functions-host/workers/python/3.6/LINUX/X64/azure_functions_worker/loader.py&quot;, line 76, in load_function mod = importlib.import_module(fullmodname) File &quot;/usr/local/lib/python3.6/importlib/init.py&quot;, line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File &quot;&quot;, line 994, in _gcd_import File &quot;&quot;, line 971, in _find_and_load File &quot;&quot;, line 941, in _find_and_load_unlocked File &quot;&quot;, line 219, in _call_with_frames_removed File &quot;&quot;, line 994, in _gcd_import File &quot;&quot;, line 971, in _find_and_load File &quot;&quot;, line 955, in _find_and_load_unlocked File &quot;&quot;, line 665, in _load_unlocked File &quot;&quot;, line 678, in exec_module File &quot;&quot;, line 219, in _call_with_frames_removed File &quot;/home/site/wwwroot/JFG_MATCHMERGE/init.py&quot;, line 7, in import pyodbc
  </code></pre>