python的第三方库库安装在哪里了

python的第三方库会被安装在site-packages文件夹中，这是很多人都知道的事情，但这个文件夹又在哪里呢？当你的系统里安装了好几python的版本时，往往会搞不清楚自己当前所用的python的目录是哪里，想要进入到site-packages进行一些操作，却发现自己根本不知道。

我也曾被这样的事情困扰过，还为此百度搜索，最后发现，找到所用的python安装目录是一个非常简单的事情，这里给大家介绍两种方法

方法1，通过sys.path

在交互式解释器里，import sys，然后输出sys.path的内容

Python 3.6.8 (tags/v3.6.8:3c6b436a57, Dec 24 2018, 00:16:47) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', 'D:\\python\\python36.zip', 'D:\\python\\DLLs', 'D:\\python\\lib', 'D:\\python', 'D:\\python\\lib\\site-packages', 'D:\\python\\lib\\site-packages\\utility-0.1.9-py3.6.egg', 'D:\\python\\lib\\site-packages\\requests-2.21.0-py3.6.egg', 'D:\\python\\lib\\site-packages\\kazoo-2.7.0-py3.6.egg', 'D:\\python\\lib\\site-packages\\urllib3-1.24.3-py3.6.egg', 'D:\\python\\lib\\site-packages\\idna-2.8-py3.6.egg', 'D:\\python\\lib\\site-packages\\chardet-3.0.4-py3.6.egg', 'D:\\python\\lib\\site-packages\\certifi-2020.4.5.1-py3.6.egg', 'D:\\python\\lib\\site-packages\\win32', 'D:\\python\\lib\\site-packages\\win32\\lib', 'D:\\python\\lib\\site-packages\\Pythonwin']

sys.path包含的是 python的搜索模块的路径集 ，当我们在脚本里执行import语句时，会在sys.path的路径中依次进行查找。

方法2，使用sysconfig

sysconfig模块可以获得python的许多配置参数，在shell里执行

python -m sysconfig

即可获得当前所用python的详细配置参数

Platform: "win-amd64"
Python version: "3.6"
Current installation scheme: "nt"
​
Paths:
        data = "D:\python"
        include = "D:\python\Include"
        platinclude = "D:\python\Include"
        platlib = "D:\python\Lib\site-packages"
        platstdlib = "D:\python\Lib"
        purelib = "D:\python\Lib\site-packages"
        scripts = "D:\python\Scripts"
        stdlib = "D:\python\Lib"
​
Variables:
        BINDIR = "D:\python"
        BINLIBDEST = "D:\python\Lib"
        EXE = ".exe"
        EXT_SUFFIX = ".pyd"
        INCLUDEPY = "D:\python\Include"
        LIBDEST = "D:\python\Lib"
        SO = ".pyd"
        VERSION = "36"
        abiflags = ""
        base = "D:\python"
        exec_prefix = "D:\python"
        installed_base = "D:\python"
        installed_platbase = "D:\python"
        platbase = "D:\python"
        prefix = "D:\python"
        projectbase = "D:\python"
        py_version = "3.6.8"
        py_version_nodot = "36"
        py_version_short = "3.6"
        srcdir = "D:\python"
        userbase = "C:\Users\zhangdongsheng\AppData\Roaming\Python"

输出的信息可能会很多，如果不方便查看，你还可以编写代码输出指定的信息

import sysconfig
​
print(sysconfig.get_path("platlib"))  # D:\python\Lib\site-packages