Why Can\'t I Compile My Cython File? (\'Cannot open include file: \'io.h\'\')

How to Resolve "Cannot open include file: 'io.h': No such file or directory" Error While Compiling Cython File

When trying to compile a .pyx file with Cython, users often encounter the error "Cannot open include file: 'io.h': No such file or directory." This is typically encountered when compiling on Windows systems. To address this error, you need to install the Windows 10 SDK.

Solution:

1. Download and Install Visual Studio Build Tools: Download Microsoft Visual Studio Build Tools and install them.

2. Install Specific Features: During the installation process, select the following features:

   • Visual C Build tools core features
   • MSVC toolset C 2019 v142 (x86, x64)
   • Visual C 2019 Redistributable Update
   • Windows 10 SDK (10.0.17763.0) for Desktop C
3. Confirm Installation: Once the installation is complete, you should have the necessary include files, such as "io.h," available.

Note:

For users with Visual Studio 2022, the Visual Studio Installer (located in the VS2022 start menu folder) can be used instead of Visual Studio Build Tools for the same purpose.

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