error : Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-4yvgy84g/cryptography/

[feydreva]

Hello, I am trying to go through this workbook.

After finding about python 2.7, I am now using the nexcloud reload branche / script.
I got this error duing the 1st script on nextcloud reloaded :

Collecting ansible==2.9.18
  Downloading https://files.pythonhosted.org/packages/0a/39/a01454174d3c41f0fb6b4a26a677c33bfd1a7144b29e19d7b9549e84eda5/ansible-2.9.18.tar.gz (14.3MB)
    100% |████████████████████████████████| 14.3MB 80kB/s 
Collecting PyYAML (from ansible==2.9.18)
  Downloading https://files.pythonhosted.org/packages/7a/5b/bc0b5ab38247bba158504a410112b6c03f153c652734ece1849749e5f518/PyYAML-5.4.1-cp36-cp36m-manylinux1_x86_64.whl (640kB)
    100% |████████████████████████████████| 645kB 1.7MB/s 
Collecting cryptography (from ansible==2.9.18)
  Downloading https://files.pythonhosted.org/packages/9b/77/461087a514d2e8ece1c975d8216bc03f7048e6090c5166bc34115afdaa53/cryptography-3.4.7.tar.gz (546kB)
    100% |████████████████████████████████| 552kB 2.1MB/s 
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-4yvgy84g/cryptography/setup.py", line 14, in <module>
        from setuptools_rust import RustExtension
    ModuleNotFoundError: No module named 'setuptools_rust'
    
            =============================DEBUG ASSISTANCE==========================
            If you are seeing an error here please try the following to
            successfully install cryptography:
    
            Upgrade to the latest pip and try again. This will fix errors for most
            users. See: https://pip.pypa.io/en/stable/installing/#upgrading-pip
            =============================DEBUG ASSISTANCE==========================
    
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-4yvgy84g/cryptography/

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   Ubuntu System ready to install nextcloud.

main: line 19: ansible: command not found

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To solve this I had to run this commands :
sudo python get-pip.py
sudo python3 -m pip install -U pip
sudo python3 -m pip install -U setuptools

1st script ran ok, with theses warning

distutils: /usr/local/lib/python3.6/dist-packages                                                                                                                                                                                                                                                                           
sysconfig: /usr/lib/python3.6/site-packages                                                                                                                                                                                                                                                                                 
WARNING: Value for scheme.purelib does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /usr/local/lib/python3.6/dist-packages                                                                                                                                                                                                                                                                           
sysconfig: /usr/lib/python3.6/site-packages                                                                                                                                                                                                                                                                                 
WARNING: Value for scheme.headers does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /usr/local/include/python3.6/UNKNOWN                                                                                                                                                                                                                                                                             
sysconfig: /usr/include/python3.6m                                                                                                                                                                                                                                                                                          
WARNING: Value for scheme.scripts does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /usr/local/bin                                                                                                                                                                                                                                                                                                   
sysconfig: /usr/bin                                                                                                                                                                                                                                                                                                         
WARNING: Value for scheme.data does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /usr/local
sysconfig: /usr
WARNING: Additional context:
user = False
home = None
root = None
prefix = None

[ReinerNippes]

Yeah. Sorry. But it seems (to me) impossible to maintain a script that simply installs ansible. You have to a kind python guru-hero to this.

I normally run and test my script on AWS EC2s and Hetzner vservers. Based on these images it was working up to now.
which base image/vserver did you use?