在 Python 3.4.0 中使用「Value」模組時如何修復「ImportError：沒有名為「_ctypes」的模組」？

Python3: ImportError: No module named '_ctypes' When Using Value from Module 'multiprocessing' in Python 3.4.0

User Question:
Upon updating to Python 3.4.0, user attempts to utilize the Value variable from the multiprocessing module, but encounters an "ImportError: No module named '_ctypes'" error. The issue persists despite installing both Python 2.7.5 and 3.4.0.

Solution:
The solution lies in installing the libffi-dev (or libffi-devel for RHEL/Fedora) dependency.

Explanation:
The libffi-dev package is essential for compiling Python 3.7 and its dependencies. If this package is not present, the compilation process will fail, resulting in the ImportError.

To install libffi-dev, follow the appropriate commands for your operating system:

• For RHEL/Fedora:

  sudo yum install libffi-devel

• For Debian/Ubuntu:

  sudo apt-get install libffi-dev

Once libffi-dev is installed, re-installing Python 3.4 should resolve the issue and allow the user to utilize the Value variable from the multiprocessing module.

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