How to Fix the \'Cannot open include file: \'io.h\': No such file or directory\' Error in Cython?

Resolve the "Cannot open include file: 'io.h': No such file or directory" Error in Cython Compilation

When attempting to compile a Cython .pyx file, you may encounter the error "Cannot open include file: 'io.h': No such file or directory." This issue arises due to the absence of the Windows 10 SDK, which is essential for Cython compilation.

To resolve this error:

1. Download and install the Visual Studio Build Tools.

   • Select the "Visual C Build tools core features" option.
   • Install the "MSVC toolset C 2019 v142 (x86,x64)" and "Visual C 2019 Redistributable Update."

2. Install the Windows 10 SDK (10.0.17763.0) for Desktop C .

   • Open the "Visual Studio Installer" (located in the VS start menu folder).
   • Select the "Individual components" tab.
   • Scroll down and locate the "Windows 10 SDK" component.
   • Install the SDK.

After installing these components, rerun your compilation command:

python setup.py build_ext --inplace

This should successfully compile your Cython file and resolve the "Cannot open include file: 'io.h': No such file or directory" error.

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