conans.errors.ConanException: libwebp/1.0.3@bincrafters/stable: 'settings.compiler' value not defined

[apophatique]

Hello, please, help me, i just dont know what to do
I'm trying to install webp in pycharm on windows, but i get this error:

In this thread (https://stackoverflow.com/questions/64799277/installing-of-webp-conan-errror/64802122#64802122) i've got an advice to install Visual Studio, but it doesnt help.

I'm trying to install webp for a 3-4 days, please help me, what should i do?

Thanks

[anibali]

Installing Visual Studio (with the C++ build tools and Windows 10 SDK) is correct. However, you must also configure your Conan profile so that it knows to use the compiler you installed.

conan profile update "settings.compiler=Visual Studio" default
conan profile update "settings.compiler.version=14" default
pip install webp

[apophatique]

Installing Visual Studio (with the C++ build tools and Windows 10 SDK) is correct. However, you must also configure your Conan profile so that it knows to use the compiler you installed.

conan profile update "settings.compiler=Visual Studio" default
conan profile update "settings.compiler.version=14" default
pip install webp

Oh, thank you man! It actually works now

[C-H-Simpson]

I'm trying to follow these instructions to install webp on Windows 10, and am getting the error

conans.errors.ConanException: compiler not defined for compiler.version
Please define compiler value first too

I tried following the instructions

conan profile update "settings.compiler=Visual Studio" default
conan profile update "settings.compiler.version=14" default
pip install webp

But afterwards the resulting error messages are exactly the same.

Here is the full trace.

>pip install webp
Collecting webp
  Using cached webp-0.1.3.tar.gz (10 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... error
  ERROR: Command errored out with exit status 1:
   command: 'C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\python.exe' 'C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py' prepare_metadata_for_build_wheel 'C:\Users\ucbqc38\AppData\Local\Temp\tmps62z4eau'
       cwd: C:\Users\ucbqc38\AppData\Local\Temp\pip-install-hvg0u1fg\webp_abbbaa5c80284d85952669dbe241fc92
  Complete output (47 lines):
  platform.architecture: ('64bit', 'WindowsPE')
  platform.machine: AMD64
  Traceback (most recent call last):
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", line 363, in <module>
      main()
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", line 345, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", line 164, in prepare_metadata_for_build_wheel
      return hook(metadata_directory, config_settings)
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\setuptools\build_meta.py", line 174, in prepare_metadata_for_build_wheel
      self.run_setup()
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\setuptools\build_meta.py", line 158, in run_setup
      exec(compile(code, __file__, 'exec'), locals())
    File "setup.py", line 10, in <module>
      setup(
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\setuptools\__init__.py", line 153, in setup
      return distutils.core.setup(**attrs)
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\setuptools\_distutils\core.py", line 109, in setup
      _setup_distribution = dist = klass(attrs)
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\setuptools\dist.py", line 459, in __init__
      _Distribution.__init__(
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\setuptools\_distutils\dist.py", line 293, in __init__
      self.finalize_options()
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\setuptools\dist.py", line 837, in finalize_options
      ep(self)
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\setuptools\dist.py", line 858, in _finalize_setup_keywords
      ep.load()(self, ep.name, value)
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\cffi\setuptools_ext.py", line 219, in cffi_modules
      add_cffi_module(dist, cffi_module)
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\cffi\setuptools_ext.py", line 49, in add_cffi_module
      execfile(build_file_name, mod_vars)
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\cffi\setuptools_ext.py", line 25, in execfile
      exec(code, glob, glob)
    File "webp_build/builder.py", line 21, in <module>
      conan.install(path=getcwd(), cwd=tmp_dir, settings=settings, build=['missing'])
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\conans\client\conan_api.py", line 93, in wrapper
      return f(api, *args, **kwargs)
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\conans\client\conan_api.py", line 597, in install
      graph_info = get_graph_info(profile_host, profile_build, cwd, None,
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\conans\client\conan_api.py", line 1560, in get_graph_info
      phost.process_settings(cache)
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\conans\model\profile.py", line 51, in process_settings
      self.processed_settings.values = Values.from_list(list(self.settings.items()))
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-build-env-gcgvgf1z\overlay\Lib\site-packages\conans\model\values.py", line 90, in from_list
      raise ConanException("%s not defined for %s\n"
  conans.errors.ConanException: compiler not defined for compiler.version
  Please define compiler value first too
  ----------------------------------------
WARNING: Discarding https://files.pythonhosted.org/packages/73/52/070ca09e97489071d175cc880c8d738313abcf310e2edb6236af9e9a2828/webp-0.1.3.tar.gz#sha256=d06d6020c2b99f7895400d4d45fb33ebfea0f56badd2e63c6d38119ec6a9a38f (from https://pypi.org/simple/webp/) (requires-python:>=3.6). Command errored out with exit status 1: 'C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\python.exe' 'C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py' prepare_metadata_for_build_wheel 'C:\Users\ucbqc38\AppData\Local\Temp\tmps62z4eau' Check the logs for full command output.
  Using cached webp-0.1.2.tar.gz (11 kB)
  Preparing metadata (setup.py) ... error
  ERROR: Command errored out with exit status 1:
   command: 'C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\python.exe' -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\ucbqc38\\AppData\\Local\\Temp\\pip-install-hvg0u1fg\\webp_6ff3160ad36340fd8302b2904068b096\\setup.py'"'"'; __file__='"'"'C:\\Users\\ucbqc38\\AppData\\Local\\Temp\\pip-install-hvg0u1fg\\webp_6ff3160ad36340fd8302b2904068b096\\setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:\Users\ucbqc38\AppData\Local\Temp\pip-pip-egg-info-c2nt5vff'
       cwd: C:\Users\ucbqc38\AppData\Local\Temp\pip-install-hvg0u1fg\webp_6ff3160ad36340fd8302b2904068b096\
  Complete output (38 lines):
  C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\installer.py:27: SetuptoolsDeprecationWarning: setuptools.installer is deprecated. Requirements should be satisfied by a PEP 517 installer.
    warnings.warn(
  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-install-hvg0u1fg\webp_6ff3160ad36340fd8302b2904068b096\setup.py", line 6, in <module>
      setup(
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\__init__.py", line 153, in setup
      return distutils.core.setup(**attrs)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\_distutils\core.py", line 109, in setup
      _setup_distribution = dist = klass(attrs)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\dist.py", line 459, in __init__
      _Distribution.__init__(
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\_distutils\dist.py", line 293, in __init__
      self.finalize_options()
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\dist.py", line 837, in finalize_options
      ep(self)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\dist.py", line 858, in _finalize_setup_keywords
      ep.load()(self, ep.name, value)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\cffi\setuptools_ext.py", line 219, in cffi_modules
      add_cffi_module(dist, cffi_module)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\cffi\setuptools_ext.py", line 49, in add_cffi_module
      execfile(build_file_name, mod_vars)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\cffi\setuptools_ext.py", line 25, in execfile
      exec(code, glob, glob)
    File "webp_build/builder.py", line 14, in <module>
      conan.install(path=getcwd(), cwd=tmp_dir)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\client\conan_api.py", line 93, in wrapper
      return f(api, *args, **kwargs)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\client\conan_api.py", line 597, in install
      graph_info = get_graph_info(profile_host, profile_build, cwd, None,
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\client\conan_api.py", line 1560, in get_graph_info
      phost.process_settings(cache)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\model\profile.py", line 51, in process_settings
      self.processed_settings.values = Values.from_list(list(self.settings.items()))
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\model\values.py", line 90, in from_list
      raise ConanException("%s not defined for %s\n"
  conans.errors.ConanException: compiler not defined for compiler.version
  Please define compiler value first too
  ----------------------------------------
WARNING: Discarding https://files.pythonhosted.org/packages/16/60/be7e03cd6423308a5e7bbeace6e7eb612172534734043d8ffbae77862df3/webp-0.1.2.tar.gz#sha256=3d71b890ffdf39dcda02086f28fe66727f06b3a4854ec8e86d1318628c3ff044 (from https://pypi.org/simple/webp/). Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
  Using cached webp-0.1.1.tar.gz (10 kB)
  Preparing metadata (setup.py) ... error
  ERROR: Command errored out with exit status 1:
   command: 'C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\python.exe' -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\ucbqc38\\AppData\\Local\\Temp\\pip-install-hvg0u1fg\\webp_6951a7b2a57848f6ad5cef91c6a334c8\\setup.py'"'"'; __file__='"'"'C:\\Users\\ucbqc38\\AppData\\Local\\Temp\\pip-install-hvg0u1fg\\webp_6951a7b2a57848f6ad5cef91c6a334c8\\setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:\Users\ucbqc38\AppData\Local\Temp\pip-pip-egg-info-gmb3ffai'
       cwd: C:\Users\ucbqc38\AppData\Local\Temp\pip-install-hvg0u1fg\webp_6951a7b2a57848f6ad5cef91c6a334c8\
  Complete output (38 lines):
  C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\installer.py:27: SetuptoolsDeprecationWarning: setuptools.installer is deprecated. Requirements should be satisfied by a PEP 517 installer.
    warnings.warn(
  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-install-hvg0u1fg\webp_6951a7b2a57848f6ad5cef91c6a334c8\setup.py", line 6, in <module>
      setup(
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\__init__.py", line 153, in setup
      return distutils.core.setup(**attrs)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\_distutils\core.py", line 109, in setup
      _setup_distribution = dist = klass(attrs)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\dist.py", line 459, in __init__
      _Distribution.__init__(
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\_distutils\dist.py", line 293, in __init__
      self.finalize_options()
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\dist.py", line 837, in finalize_options
      ep(self)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\dist.py", line 858, in _finalize_setup_keywords
      ep.load()(self, ep.name, value)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\cffi\setuptools_ext.py", line 219, in cffi_modules
      add_cffi_module(dist, cffi_module)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\cffi\setuptools_ext.py", line 49, in add_cffi_module
      execfile(build_file_name, mod_vars)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\cffi\setuptools_ext.py", line 25, in execfile
      exec(code, glob, glob)
    File "webp_build/builder.py", line 14, in <module>
      conan.install(path=getcwd(), cwd=tmp_dir)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\client\conan_api.py", line 93, in wrapper
      return f(api, *args, **kwargs)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\client\conan_api.py", line 597, in install
      graph_info = get_graph_info(profile_host, profile_build, cwd, None,
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\client\conan_api.py", line 1560, in get_graph_info
      phost.process_settings(cache)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\model\profile.py", line 51, in process_settings
      self.processed_settings.values = Values.from_list(list(self.settings.items()))
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\model\values.py", line 90, in from_list
      raise ConanException("%s not defined for %s\n"
  conans.errors.ConanException: compiler not defined for compiler.version
  Please define compiler value first too
  ----------------------------------------
WARNING: Discarding https://files.pythonhosted.org/packages/58/90/44ac4929b2f293a58741876a177bf62f334c45bef4d0adc43b713203a1c1/webp-0.1.1.tar.gz#sha256=f4391dd6f56c1eef9df54071240ce0f3cf9bfb64320a4c8cf97d8a40bfd0eac9 (from https://pypi.org/simple/webp/). Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
  Using cached webp-0.1.0.tar.gz (10 kB)
  Preparing metadata (setup.py) ... error
  ERROR: Command errored out with exit status 1:
   command: 'C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\python.exe' -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\ucbqc38\\AppData\\Local\\Temp\\pip-install-hvg0u1fg\\webp_47a9347bdfd2410a8bd410da41084bfa\\setup.py'"'"'; __file__='"'"'C:\\Users\\ucbqc38\\AppData\\Local\\Temp\\pip-install-hvg0u1fg\\webp_47a9347bdfd2410a8bd410da41084bfa\\setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:\Users\ucbqc38\AppData\Local\Temp\pip-pip-egg-info-hsg_goy1'
       cwd: C:\Users\ucbqc38\AppData\Local\Temp\pip-install-hvg0u1fg\webp_47a9347bdfd2410a8bd410da41084bfa\
  Complete output (38 lines):
  C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\installer.py:27: SetuptoolsDeprecationWarning: setuptools.installer is deprecated. Requirements should be satisfied by a PEP 517 installer.
    warnings.warn(
  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "C:\Users\ucbqc38\AppData\Local\Temp\pip-install-hvg0u1fg\webp_47a9347bdfd2410a8bd410da41084bfa\setup.py", line 6, in <module>
      setup(
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\__init__.py", line 153, in setup
      return distutils.core.setup(**attrs)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\_distutils\core.py", line 109, in setup
      _setup_distribution = dist = klass(attrs)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\dist.py", line 459, in __init__
      _Distribution.__init__(
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\_distutils\dist.py", line 293, in __init__
      self.finalize_options()
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\dist.py", line 837, in finalize_options
      ep(self)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\setuptools\dist.py", line 858, in _finalize_setup_keywords
      ep.load()(self, ep.name, value)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\cffi\setuptools_ext.py", line 219, in cffi_modules
      add_cffi_module(dist, cffi_module)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\cffi\setuptools_ext.py", line 49, in add_cffi_module
      execfile(build_file_name, mod_vars)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\cffi\setuptools_ext.py", line 25, in execfile
      exec(code, glob, glob)
    File "webp_build/builder.py", line 14, in <module>
      conan.install(path=getcwd(), cwd=tmp_dir)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\client\conan_api.py", line 93, in wrapper
      return f(api, *args, **kwargs)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\client\conan_api.py", line 597, in install
      graph_info = get_graph_info(profile_host, profile_build, cwd, None,
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\client\conan_api.py", line 1560, in get_graph_info
      phost.process_settings(cache)
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\model\profile.py", line 51, in process_settings
      self.processed_settings.values = Values.from_list(list(self.settings.items()))
    File "C:\Users\ucbqc38\Documents\RoofPedia\Roofpedia\env\lib\site-packages\conans\model\values.py", line 90, in from_list
      raise ConanException("%s not defined for %s\n"
  conans.errors.ConanException: compiler not defined for compiler.version
  Please define compiler value first too
  ----------------------------------------
WARNING: Discarding https://files.pythonhosted.org/packages/62/df/1efb36189ee596f6d3773c8c1b051ada90d244a601b0e4de00181e8fa6f9/webp-0.1.0.tar.gz#sha256=9f15bf22999789b05f12dd02e0970d44adf506e086ea9558e6c5abc4c5585126 (from https://pypi.org/simple/webp/). Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
ERROR: Could not find a version that satisfies the requirement webp (from versions: 0.1.0a4, 0.1.0a5, 0.1.0a6, 0.1.0a7, 0.1.0a9, 0.1.0a10, 0.1.0a11, 0.1.0a12, 0.1.0a13, 0.1.0a14, 0.1.0a15, 0.1.0a16, 0.1.0, 0.1.1, 0.1.2, 0.1.3)
ERROR: No matching distribution found for webp

[anibali]

@ArtyomEnRage There are Windows binary builds available for Python 3.10, 3.9, 3.8, 3.7, and 3.6 as can be seen here: https://pypi.org/project/webp/#files. If you do not have a setup which matches an available binary build, the C extension has to be built and this requires a compiler (on Windows this means Visual Studio). Which version of Python are you using?

Why can't the install be simple and download the module like all others ?

Because this is a binding to a native library. Unlike pure Python packages, distributing pywebp so that it is "simple" to install means building for each different platform and each different Python version. I am just one person maintaining this in my free time.

As an aside, please try to be a bit more considerate and kind with your wording in the future. There are many developers just like me who are providing software to others for free in our spare time just to be helpful, not for pay. We are much more likely to spend time resolving issues with users who are understanding and work with us.