Python3一些容易出现安装错误的模块

安装mysql

CentOS

sudo yum install mariadb-devel

MacOS

brew install mysql

安装python-mysql

pip install mysqlclient torndb

安装pycurl

如果安装pycurl时报错 No such file or directory: 'curl-config'，安装openssl-dev

sudo apt install libcurl4-openssl-dev libssl-dev
sudo yum install libcurl-devel openssl-devel

CentOS等系统自带的libcurl一般都比较旧，推荐使用anaconda安装。

conda install curl

由于libcurl的源码编译因素，在安装pycurl可能会导致以下两种错误。

错误1：ImportError: pycurl: libcurl link-time ssl backend (openssl) is different from compile-time ssl backend (none/other)

错误2：ImportError: pycurl: libcurl link-time ssl backend (nss) is different from compile-time ssl backend (openssl)

错误1的解决办法如下：

pip uninstall pycurl -y
export PYCURL_SSL_LIBRARY=openssl
pip install pycurl --no-cache-dir

错误2的解决办法如下：

pip uninstall pycurl -y
export PYCURL_SSL_LIBRARY=nss
pip install pycurl --no-cache-dir

如果使用nss安装的pycurl，没有XFERINFOFUNCTION属性，无法记录上传进度。