python学习点滴

来源：互联网发布：淘宝如何换类目编辑：程序博客网时间：2024/05/17 04:30

1、安装qrcode：

N:\python\WXBot>weixin.py

Traceback (most recent call last):
File "N:\python\WXBot\weixin.py", line 3, in <module>
import qrcode
ImportError: No module named qrcode

N:\python\WXBot>c:

C:\>cd C:\Python27\Scripts

C:\Python27\Scripts>pip install qrcode
Collecting qrcode
Using cached qrcode-5.3-py2.py3-none-any.whl
Collecting six (from qrcode)
Using cached six-1.10.0-py2.py3-none-any.whl
Installing collected packages: six, qrcode
Successfully installed qrcode-5.3 six-1.10.0
You are using pip version 8.1.1, however version 9.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' comm

and.

提示缺什么就装什么，非常方便。比如这个：ImportError: No module named requests

N:\python\WXBot>c:

C:\Python27\Scripts>pip install requests
Collecting requests
Using cached requests-2.12.1-py2.py3-none-any.whl
Installing collected packages: requests
Successfully installed requests-2.12.1

这样就安装好了。

================如果网上的版本不对,可下载到本机.

遇到过自动下载库文件下载的不对的情况，lxml-3.4.4-cp26-none-win32.whl 中的cp26表示对应的python是2.6版本的，但是我们安装的Python是2.7版本的。所以库文件和python版本要对应好！

另外win32也表示对应的python版本是32位的，如果python是64位的话，则需要下载xml-3.6.4-cp27-cp27m-win64.whl

http://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml

pip install N:\python\lxml-3.6.4-cp27-cp27m-win32.whl

C:\Python27\Scripts>pip install N:\python\lxml-3.6.4-cp27-cp27m-win32.whl
Processing n:\python\lxml-3.6.4-cp27-cp27m-win32.whl
Installing collected packages: lxml
Successfully installed lxml-3.6.4

0 0