sdl-config: not found

[guettli]

I try to install the requirements, and this fails while installing pygame

(soclone) guettli@yoga15:~/projects/soclone/src/StackOverFlow-Clone$ pip install -r requirements.txt 
Collecting asgiref==3.2.10
  Using cached asgiref-3.2.10-py3-none-any.whl (19 kB)
Collecting astroid==2.4.2
  Downloading astroid-2.4.2-py3-none-any.whl (213 kB)
     |████████████████████████████████| 213 kB 4.5 MB/s 
Collecting colorama==0.4.3
  Using cached colorama-0.4.3-py2.py3-none-any.whl (15 kB)
Collecting Django==3.1
  Downloading Django-3.1-py3-none-any.whl (7.8 MB)
     |████████████████████████████████| 7.8 MB 5.6 MB/s 
Collecting django-email-verification==0.0.7
  Downloading django_email_verification-0.0.7-py3-none-any.whl (7.7 kB)
Collecting isort==4.3.21
  Downloading isort-4.3.21-py2.py3-none-any.whl (42 kB)
     |████████████████████████████████| 42 kB 1.2 MB/s 
Collecting lazy-object-proxy==1.4.3
  Downloading lazy_object_proxy-1.4.3-cp38-cp38-manylinux1_x86_64.whl (58 kB)
     |████████████████████████████████| 58 kB 5.3 MB/s 
Collecting mccabe==0.6.1
  Downloading mccabe-0.6.1-py2.py3-none-any.whl (8.6 kB)
Collecting mypy==0.782
  Using cached mypy-0.782-cp38-cp38-manylinux1_x86_64.whl (21.7 MB)
Collecting mypy-extensions==0.4.3
  Using cached mypy_extensions-0.4.3-py2.py3-none-any.whl (4.5 kB)
Collecting Pillow==7.2.0
  Using cached Pillow-7.2.0-cp38-cp38-manylinux1_x86_64.whl (2.2 MB)
Collecting pygame==1.9.6
  Downloading pygame-1.9.6.tar.gz (3.2 MB)
     |████████████████████████████████| 3.2 MB 10.2 MB/s 
    ERROR: Command errored out with exit status 1:
     command: /home/guettli/projects/soclone/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-780vmvxy/pygame/setup.py'"'"'; __file__='"'"'/tmp/pip-install-780vmvxy/pygame/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-780vmvxy/pygame/pip-egg-info
         cwd: /tmp/pip-install-780vmvxy/pygame/
    Complete output (12 lines):

    WARNING, No "Setup" File Exists, Running "buildconfig/config.py"
    Using UNIX configuration...

    /bin/sh: 1: sdl-config: not found
    /bin/sh: 1: sdl-config: not found
    /bin/sh: 1: sdl-config: not found

    Hunting dependencies...
    WARNING: "sdl-config" failed!
    Unable to run "sdl-config". Please make sure a development version of SDL is installed.
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

Why is pygame needed?

[AnkitMitraOfficial]

I really don't know why pygame is needed

[guettli]

How did you created the requirements.txt file?

BTW, dependency management in python in done with setup.py.

Unfortunately many people think requirements.txt gets used for dependency management. But that's not true. The r.txt file is just for dumping out a good working set. But for automatically installing dependencies, please use install_requires in setup.py