python在linux系统怎么安装

1、linux下安装python3

a、 准备编译环境(环境如果不对的话，可能遇到各种问题，比如wget无法下载https链接的文件)

yum groupinstall 'Development Tools'

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel

2 下载 Python3.5代码包

wget https://www.python.org/ftp/python/3.5.0/Python-3.5.0.tar.xz

在安装包中有一个README的文件，里面有写如何安装

tar Jxvf Python-3.5.0.tar.xz

cd Python-3.5.0

./configure --prefix=/usr/local/python3

make &&make install

做软链：

ln -s /usr/local/python3/bin/python3.5 /usr/local/bin/python3

安装成功了！

如果提示：Ignoring ensurepip failure: pip 7.1.2 requires SSL/TLS

这是原因没有安装或升级oenssl:

yum install openssl-devel

再次重复编译方案python3.5:

最终如下：

提示同时成功安装pip-7.12与setuptools！

pip3与pip都提示没有错误！

做软链：

ln -s /usr/local/python3/bin/pip3.5 /usr/local/bin/pip

升级pip到最新版本：

pip install --upgrade pip

pip安装成功啦！

注：--no-check-certificate 表示安装时“不检查证书”，不加上可能无法安装。

2.安装包

requests包：

pip install requests

pyquery包：

pip install pyquery

pymysql包：

pip install pymysql

1、先说一下什么是pip

pip 是“A tool for installing and managing Python packages.”，也就是说pip是python的软件安装工具

2、下面介绍怎么在linux下安装pip

下载pip到/usr/local/src

# cd /usr/local/src

# wget "https://pypi.python.org/packages/source/p/pip/pip-1.5.4.tar.gz#md5=834b2904f92d46aaa333267fb1c922bb" --no-check-certificate

如果提示：-bash: wget: command not found

那么安装wget，执行如下：

# yum -y install wget

解夺安装pip

# tar -xzvf pip-1.5.4.tar.gz

# cd pip-1.5.4

# python setup.py install

如果安装报下面的错：

Traceback (most recent call last):

File "setup.py", line 6, in <module>

from setuptools import setup, find_packages

ImportError: No module named setuptools

那么就要先安装setuptools包

(1)下载setuptools包

# wget http://pypi.python.org/packages/source/s/setuptools/setuptools-2.0.tar.gz

(2)解压setuptools包

# tar zxvf setuptools-2.0.tar.gz

# cd setuptools-2.0

(3)编译setuptools

# python setup.py build

(4)开始执行setuptools安装

# python setup.py install

安装完成setuptools包后，在重新执行：

# cd /usr/local/src/pip-1.5.4

# python setup.py install

至此pip安装完成

3、linux下pip使用参数

# pip --help

Usage:

pip <command>[options]

Commands:

install Install packages.

uninstall Uninstall packages.

freeze Output installed packages in requirements format.

listList installed packages.

showShow information about installed packages.

search Search PyPI for packages.

wheel Build wheels from your requirements.

zip DEPRECATED. Zip individual packages.

unzip DEPRECATED. Unzip individual packages.

bundle DEPRECATED. Create pybundles.

helpShow help for commands.

General Options:

-h, --help Show help.

-v, --verbose Give more output. Option is additive, and can be used up to 3 times.

-V, --version Show version and exit.

-q, --quiet Give less output.

--log-file <path> Path to a verbose non-appending log, that only logs failures. This log is active by default at /root/.pip/pip.log.

--log <path> Path to a verbose appending log. This log is inactive by default.

--proxy <proxy>Specify a proxy in the form [user:passwd@]proxy.server:port.

--timeout <sec>Set the socket timeout (default 15 seconds).

--exists-action <action> Default action when a path already exists: (s)witch, (i)gnore, (w)ipe, (b)ackup.

--cert <path> Path to alternate CA bundle.

1、linux下安装python3

a、 准备编译环境(环境如果不对的话，可能遇到各种问题，比如wget无法下载https链接的文件)

1

2

yum groupinstall 'Development Tools'

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel

2 下载 Python3.5代码包

wget https://www.python.org/ftp/python/3.5.0/Python-3.5.0.tar.xz

在安装包中有一个README的文件，里面有写如何安装

tar Jxvf Python-3.5.0.tar.xz

cd Python-3.5.0

./configure --prefix=/usr/local/python3

make &&make install

提示：Ignoring ensurepip failure: pip 7.1.2 requires SSL/TLS

这是原因没有安装或升级oenssl:

yum install openssl-devel

再次重复编译方案python3.5:

最终如下：

提示同时成功安装pip-7.12与setuptools！

pip3与pip都提示没有错误！

做软链：

ln -s /usr/local/python3/bin/pip3.5 /usr/local/bin/pip

升级pip到最新版本：

pip install --upgrade pip

pip安装成功啦！

注：--no-check-certificate 表示安装时“不检查证书”，不加上可能无法安装。

2.安装包

requests包：

pip install requests

pyquery包：

pip install pyquery

pymysql包：

pip install pymysql

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