python2和3共存时pip安装的问题
安装有python2和python3多版本的情况下,我们使用pip安装模块容易出问题:# python -m pip install psutil
Collecting psutil
Downloading psutil-5.4.1.tar.gz (408kB)
Installed /usr/local/python3/lib/python3.6/site-packages/psutil-5.4.0-py3.6-linux-x86_64.egg
Processing dependencies for psutil==5.4.0
Finished processing dependencies for psutil==5.4.0
# python
Python 3.6.3 (default, Nov9 2017, 00:02:58)
on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import psutil
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/root/psutil-5.4.0/psutil/__init__.py", line 93, in <module>
from . import _pslinux as _psplatform
File "/root/psutil-5.4.0/psutil/_pslinux.py", line 26, in <module>
from . import _psutil_linux as cext
ImportError: cannot import name '_psutil_linux'
这个错误,并不是没有psutil模块报的错,而是因为我的系统里面装了python2和python3,所以在使用pip安装的时候,会安装到2里面,导致了这个报错
当我们安装了2和3的时候,使用pip安装模块的时候,需要在pip之前声明是2还是3
# python -m pip install psutil#我的系统里面有python2.7和python3.6,python就是3.6版本
Collecting psutil
Downloading psutil-5.4.1.tar.gz (408kB)
.....................
97% |███████████████████████████████▎| 399kB 738kB/s eta 0:00 100% |████████████████████████████████| 409kB 539kB/s
Installing collected packages: psutil
Running setup.py install for psutil ... done
Successfully installed psutil-5.4.1
# python
Python 3.6.3 (default, Nov9 2017, 00:02:58)
on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import psutil
>>>
我在pip前面使用python声明我当前使用的是3,而不是python2.7,这样安装就正常了.
PS:个人之见,如果有错误的地方,欢迎大家指正
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