anaconda 配置环境问题

如果anaconda不想装c盘，装其他盘的话，会遇到一个奇怪的问题：conda list查看明明安装包已经在里面了，但是代码总报错找不到module。

原因：windows 环境下，Python pip 安装库的时候，默认安装在c盘，比如C:\Users\eric\AppData\Roaming\Python\Python37\site-packages，而此时anaconda不装C盘的话，就会报错了。可能原因是目录不一致, python找的默认路径是C:\\Users\\xxx\\AppData\\Roaming\\Python, 找不到新的安装路径。

解决办法：修改pip默认install路径到anaconda装的位置

具体步骤：

1、查看目前安装路径：

python -m site
sys.path = [
'F:\\',
'D:\\Programs\\Python\\Python37\\python37.zip',
'D:\\Programs\\Python\\Python37\\DLLs',
'D:\\Programs\\Python\\Python37\\lib',
'D:\\Programs\\Python\\Python37',
'C:\\Users\\eric\\AppData\\Roaming\\Python\\Python37\\site-packages',
'D:\\Programs\\Python\\Python37\\lib\\site-packages',
]
USER_BASE: 'C:\\Users\\eric\\AppData\\Roaming\\Python' (exists)
USER_SITE: 'C:\\Users\\eric\\AppData\\Roaming\\Python\\Python37\\site-packages' (exists)
ENABLE_USER_SITE: True

其中， USER_BASE和USER_SITE就是默认的路径

2、查看配置文件

F:\>python -m site --help
D:\Programs\Python\Python37\lib\site.py [--user-base] [--user-site]

Without arguments print some useful information
With arguments print the value of USER_BASE and/or USER_SITE separated
by ';'.

Exit codes with --user-base or --user-site:
0 - user site directory is enabled
1 - user site directory is disabled by user
2 - uses site directory is disabled by super user
or for security reasons
>2 - unknown error

D:\Programs\Python\Python37\lib\site.py，就是配置文件的路径

3、修改路径：

修改D:\Programs\Python\Python37\lib\site.py

ENABLE_USER_SITE = True

USER_SITE = r"D:\Programs\Python\Python37\Lib\site-packages"
USER_BASE = r"D:\Programs\Python\Python37\Scripts"

4、检查：

F:\>python -m site
sys.path = [
'F:\\',
'D:\\Programs\\Python\\Python37\\python37.zip',
'D:\\Programs\\Python\\Python37\\DLLs',
'D:\\Programs\\Python\\Python37\\lib',
'D:\\Programs\\Python\\Python37',
'D:\\Programs\\Python\\Python37\\Lib\\site-packages',
]
USER_BASE: 'D:\\Programs\\Python\\Python37\\Scripts' (exists)
USER_SITE: 'D:\\Programs\\Python\\Python37\\Lib\\site-packages' (exists)
ENABLE_USER_SITE: True

参考：(97条消息) python之修改pip默认install路径_eric_pyt@qq.com的博客-CSDN博客