Error installing httptools as a uvicorn dependency

[ansegura7]

Hello,

I am getting the following error when installing uvicorn, with the following command:

pip install "uvicorn[standard]"

Error:

Using cached uvicorn-0.23.2-py3-none-any.whl (59 kB)
Building wheels for collected packages: httptools
 Building wheel for httptools (pyproject.toml) ... error
 error: subprocess-exited-with-error

 × Building wheel for httptools (pyproject.toml) did not run successfully.
 │ exit code: 1
 ╰─> [66 lines of output]
 running bdist_wheel
 running build
 running build_py
 creating build
 creating build\lib.win-amd64-cpython-312
 creating build\lib.win-amd64-cpython-312\httptools
 copying httptools\_version.py -> build\lib.win-amd64-cpython-312\httptools
 copying httptools\__init__.py -> build\lib.win-amd64-cpython-312\httptools
 creating build\lib.win-amd64-cpython-312\httptools\parser
 copying httptools\parser\errors.py -> build\lib.win-amd64-cpython-312\httptools\parser
 copying httptools\parser\__init__.py -> build\lib.win-amd64-cpython-312\httptools\parser
 running egg_info
 writing httptools.egg-info\PKG-INFO
 writing dependency_links to httptools.egg-info\dependency_links.txt
 writing requirements to httptools.egg-info\requires.txt
 writing top-level names to httptools.egg-info\top_level.txt
 reading manifest file 'httptools.egg-info\SOURCES.txt'
 reading manifest template 'MANIFEST.in'
 adding license file 'LICENSE'
 writing manifest file 'httptools.egg-info\SOURCES.txt'
 C:\Users\asegura\AppData\Local\Temp\pip-build-env-thzd1pw8\overlay\Lib\site-packages\setuptools\command\build_py.py:204: _Warning: Package 'httptools.parser' is absent from the `packages` configuration.
 !!

 ********************************************************************************
 ############################
 # Package would be ignored #
 ############################
 Python recognizes 'httptools.parser' as an importable package[^1],
 but it is absent from setuptools' `packages` configuration.

 This leads to an ambiguous overall configuration. If you want to distribute this
 package, please make sure that 'httptools.parser' is explicitly added
 to the `packages` configuration field.

 Alternatively, you can also rely on setuptools' discovery methods
 (for example by using `find_namespace_packages(...)`/`find_namespace:`
 instead of `find_packages(...)`/`find:`).

 You can read more about "package discovery" on setuptools documentation page:

 - https://setuptools.pypa.io/en/latest/userguide/package_discovery.html

 If you don't want 'httptools.parser' to be distributed and are
 already explicitly excluding 'httptools.parser' via
 `find_namespace_packages(...)/find_namespace` or `find_packages(...)/find`,
 you can try to use `exclude_package_data`, or `include-package-data=False` in
 combination with a more fine grained `package-data` configuration.

 You can read more about "package data files" on setuptools documentation page:

 - https://setuptools.pypa.io/en/latest/userguide/datafiles.html


 [^1]: For Python, any directory (with suitable naming) can be imported,
 even if it does not contain any `.py` files.
 On the other hand, currently there is no concept of package data
 directory, all directories are treated like packages.
 ********************************************************************************

 !!
 check.warn(importable)
 copying httptools\parser\parser.c -> build\lib.win-amd64-cpython-312\httptools\parser
 copying httptools\parser\url_parser.c -> build\lib.win-amd64-cpython-312\httptools\parser
 running build_ext
 building 'httptools.parser.parser' extension
 error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
 [end of output]

 note: This error originates from a subprocess, and is likely not a problem with pip.
 ERROR: Failed building wheel for httptools
Failed to build httptools
ERROR: Could not build wheels for httptools, which is required to install pyproject.toml-based projects

And I need the httptools package to be able to install the uvicorn server.
Any suggestions?

By the way, I'm using Python 3.12.0 x64.

Thanks in advance.

[unnati-shree]

You need to install the Microsoft Visual C++ 14.0 or greater.

Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/

This error happens because a httptools wheel does not yet exist for python 3.12

[ansegura7]

Thank you for the clarification and solution.
I will close the issue.