现象1
在安装mysqlclient的时候报错，报错信息如下：
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| ERROR: Could not find a version that satisfies the requirement mysqlclient (from versions: none)
ERROR: No matching distribution found for mysqlclient
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解决方法
- 下载mysqlclient的源码包，下载地址为：https://github.com/PyMySQL/mysqlclient-python/releases
- 解压下载的源码包，进入解压后的目录
- 执行以下命令：
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| python setup.py install
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- 安装完成后，再次执行pip install mysqlclient，应该就不会报错了。
如果刚才没什么用
如果报错信息是这样的：
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| note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error
× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.
note: This error originates from a subprocess, and is likely not a problem with pip.
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为了解决安装mysqlclient库的依赖库,要根据操作系统来安装:
ubuntu安装mysqlclient环境
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| sudo apt-get install python3-dev default-libmysqlclient-dev build-essential pkg-config
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- 安装好环境再pip install mysqlclient即可
centos安装mysqlclient环境
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| mysqlclient安装失败要先安装mysql-devel
yum install mysql-devel python3-devel gcc
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树莓派安装mysqlclient环境
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| 在raspi4b上面如果需要安装mysqlclient的包
必须在之前安装下面的包
sudo apt-get install default-lib mysqlclient-dev
apt-get install build-essential
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mac安装mysqlclient环境
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| 用brew install mysql-client，然后brew info mysql-client，有提示
根据提示将如下示例运行：
export PKG_CONFIG_PATH="/usr/local/opt/mysql-client/lib/pkgconfig”
m3芯片的mac有时安装好了pkg-config提示还是找不到，就需要再运行一下下面的命令：
export PKG_CONFIG_PATH=$(find /opt/homebrew/Cellar -name 'pkgconfig' -type d | grep lib/pkgconfig | tr '\n' ':' | sed s/.$//)
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