Scipy install Problems

Oct 12, 2023
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Hello I have once more attempted to install scipy using my command prompt but it did not work.

here is the resulting message.

C:\Users\Brandon>pip install scipy
Collecting scipy
Using cached scipy-1.11.3.tar.gz (56.3 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Installing backend dependencies ... done
Preparing metadata (pyproject.toml) ... error
error: subprocess-exited-with-error

× Preparing metadata (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [21 lines of output]
+ meson setup C:\Users\Brandon\AppData\Local\Temp\pip-install-d5p4tm0v\scipy_d9d4f3ac297741b081958cba76e9023b C:\Users\Brandon\AppData\Local\Temp\pip-install-d5p4tm0v\scipy_d9d4f3ac297741b081958cba76e9023b\.mesonpy-v1ch638y -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=C:\Users\Brandon\AppData\Local\Temp\pip-install-d5p4tm0v\scipy_d9d4f3ac297741b081958cba76e9023b\.mesonpy-v1ch638y\meson-python-native-file.ini
The Meson build system
Version: 1.2.2
Source dir: C:\Users\Brandon\AppData\Local\Temp\pip-install-d5p4tm0v\scipy_d9d4f3ac297741b081958cba76e9023b
Build dir: C:\Users\Brandon\AppData\Local\Temp\pip-install-d5p4tm0v\scipy_d9d4f3ac297741b081958cba76e9023b\.mesonpy-v1ch638y
Build type: native build
Project name: SciPy
Project version: 1.11.3
WARNING: Failed to activate VS environment: Could not find C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe

..\ ERROR: Unknown compiler(s): [['icl'], ['cl'], ['cc'], ['gcc'], ['clang'], ['clang-cl'], ['pgcc']]
The following exception(s) were encountered:
Running icl "" gave "[WinError 2] The system cannot find the file specified"
Running cl /? gave "[WinError 2] The system cannot find the file specified"
Running cc --version gave "[WinError 2] The system cannot find the file specified"
Running gcc --version gave "[WinError 2] The system cannot find the file specified"
Running clang --version gave "[WinError 2] The system cannot find the file specified"
Running clang-cl /? gave "[WinError 2] The system cannot find the file specified"
Running pgcc --version gave "[WinError 2] The system cannot find the file specified"

A full log can be found at C:\Users\Brandon\AppData\Local\Temp\pip-install-d5p4tm0v\scipy_d9d4f3ac297741b081958cba76e9023b\.mesonpy-v1ch638y\meson-logs\meson-log.txt
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.


Could let me know what went wrong and how to fix this problem, thank you.
Jan 24, 2024
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The error message indicates that it couldn't find several compilers, including icl, cl, cc, gcc, clang, clang-cl, and pgcc.
Here are some steps you can take to troubleshoot and resolve the issue:
  1. Install Microsoft Visual C++ Build Tools:
    • You might be missing the necessary build tools. Try installing the Microsoft Visual C++ Build Tools, which includes the required compilers. You can download it from here.
  2. Install NumPy:
    • SciPy depends on NumPy. Make sure NumPy is installed before trying to install SciPy. You can install NumPy using the following command:

      pip install numpy
  3. Use a Pre-built Binary:
    • Instead of building SciPy from source, you can try installing a pre-built binary. This can be faster and avoids the need for compilation.

      pip install scipy --only-binary :all:
  4. Check System Path:
    • Ensure that the directories containing the required compilers are added to your system's PATH environment variable.
  5. Check for Python Version Compatibility:
    • Make sure that your Python version is compatible with the version of SciPy you are trying to install. You can check the compatibility information on the SciPy website or use a version that is known to work with your Python version.
  6. Check Meson Logs:
    • Examine the Meson logs located in C:\Users\Brandon\AppData\Local\Temp\pip-install-d5p4tm0v\scipy_d9d4f3ac297741b081958cba76e9023b\.mesonpy-v1ch638y\meson-logs\meson-log.txt. This file may contain more details about the specific issues encountered during the build.
  7. Virtual Environment:
    • Consider using a virtual environment to avoid potential conflicts with other installed packages. Create a virtual environment, activate it, and then try installing SciPy again.
Remember to run your command prompt or terminal as an administrator to ensure that you have the necessary permissions to install packages.
After trying these steps, if the issue persists, please provide additional details or check the content of the Meson log for more information on the specific error encountered during the build process.

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