无法在Python 3.7中安装Matplotlib，Win10 64位安装报错求助

Hey there, sorry to hear you're stuck getting Matplotlib set up on your Python 3.7 with Windows 10 64-bit. Let's walk through the most reliable fixes that usually resolve this kind of installation error:

1. 先升级你的pip #

Old versions of pip often struggle with installing older package versions (like those compatible with Python 3.7). Run this command first to make sure you're using the latest pip available for your Python version:

python -m pip install --upgrade pip

2. 手动安装对应版本的wheel文件 #

Python 3.7 is no longer supported by the latest Matplotlib releases, so pip might try to pull an incompatible version by default. Here's how to fix that:

• First, confirm your Python version and architecture (64-bit) with these commands:

  python --version  # Should show 3.7.x
  python -c "import struct; print(struct.calcsize('P') * 8)"  # Should output 64
  

• Grab a compatible Matplotlib wheel file (look for versions like 3.4.3, which is the last release supporting Python 3.7). You'll need a file named something like matplotlib-3.4.3-cp37-cp37m-win_amd64.whl (the cp37 matches Python 3.7, win_amd64 is for 64-bit Windows).
• Navigate to the folder where you downloaded the wheel, then run:

  pip install matplotlib-3.4.3-cp37-cp37m-win_amd64.whl
  

3. 先手动安装依赖包 #

Matplotlib relies on other packages like numpy and kiwisolver. If these aren't installed correctly, it can break the Matplotlib setup. Install compatible versions first:

pip install numpy==1.21.6 kiwisolver==1.3.1

Once those are in place, try installing Matplotlib again with:

pip install matplotlib==3.4.3

4. 用Conda安装（如果你有Anaconda/Miniconda） #

Conda is great for handling dependencies automatically, especially for older Python versions. If you have Conda set up, run:

conda install matplotlib=3.4.3

This will pull all the right compatible dependencies for your system.

5. 检查权限问题 #

Sometimes installation fails because you don't have admin rights to write to Python's installation folders. Right-click your command prompt/PowerShell and select "Run as administrator", then try the install commands again.

6. 换国内PyPI镜像源 #

If you're hitting download timeouts or network errors, use a domestic mirror to speed up the process. For example:

pip install matplotlib==3.4.3 -i https://pypi.tuna.tsinghua.edu.cn/simple

If none of these work, share the exact error message you're seeing (the full traceback helps a lot!) and we can dig deeper.

内容的提问来源于stack exchange，提问作者uannabi