Python子產品site及site.USER_BASE site.USER_SITE

site

This module is automatically imported during initialization.

The automatic import can be suppresssed using the interpreter’s -S option.

-S: don't imply 'import site' on initialization

Disable the import of the module site and the site-dependent manipulations of sys.path that it entails.

Importing this module will append site-specific paths to the module search path and add a few builtins.

To explicitly trigger the usual site-specific additions, call the site.main() functions.

site.main()

Adds all the standard site-specific directories to the module search path.

This function is called automatically when this module is imported, unless the Python interpreter was started with the -S flag.

command line interface

python3 -m site --user-site # ~/.local/lib/python3.7/site-packages

1

–user-base : print the path to the user base directory

–user-site : print the path to the user site-packages directory

關鍵概念

USER BASE

site.USER_BASE , path to the base directory for the user site-packages

Default value is ~/.local for UNIX

USER SITE

site.USER_SITE, path to the user site-packages for the running Python.

Default value is ~/.local/lib/pythonX.Y/site-pacakges for UNIX

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更改conda環境下，pip包安裝預設路徑

tang-0203 2020-03-04 15:57:59 7886 收藏 14

分類專欄： Python學習 文章标簽： python pip conda 預設安裝路徑

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pip 指定某個路徑安裝包

# 在dir路徑下，安裝numpy包

pip install -t dir numpy

pip install --target dir numpy

設定pip預設安裝路徑

1、檢視目前預設安裝路徑

在這裡插入代碼片

python -m site

# 顯示内容

sys.path = [

'/home/users/xxx/anaconda3/envs/gluon-cv',

'/home/users/xxx/anaconda3/envs/gluon-cv/lib/python3.6/site-packages',

]

USER_BASE: '/home/users/xxx/.local' (exists)

USER_SITE: '/home/users/xxx/.local/lib/python3.6/site-packages' (exists)

ENABLE_USER_SITE: True

由于未知的原因，在gluon-cv這個環境下，預設安裝路徑指向了’/home/users/xxx/.local/lib/python3.6/site-packages’

2、重新設定USER_BASE和USER_SITE

首先conda激活環境，然後修改 site.py 中的USER_BASE和USER_SITE變量，site.py路徑：~/anaconda3/envs/gluon-cv/lib/python3.6/site.py，修改後内容如下：

ImportError exception, it is silently ignored.

"""

import sys

import os

import builtins

import _sitebuiltins

# Prefixes for site-packages; add additional prefixes like /usr/local here

PREFIXES = [sys.prefix, sys.exec_prefix]

# Enable per user site-packages directory

# set it to False to disable the feature or True to force the feature

ENABLE_USER_SITE = None

# for distutils.commands.install

# These values are initialized by the getuserbase() and getusersitepackages()

# functions, through the main() function when Python starts.

USER_SITE = '/home/users/xxx/anaconda3/envs/gluon-cv/lib/python3.6/site-packages'

USER_BASE = '/home/users/xxx/anaconda3/envs/gluon-cv'

修改後再次運作 python -m site 檢視，輸出内容如下：

USER_BASE: '/home/users/xxx/anaconda3/envs/gluon-cv' (exists)

USER_SITE: '/home/users/xxx/anaconda3/envs/gluon-cv/lib/python3.6/site-packages' (exists)

這個時候pip預設安裝路徑就修改成功了~