[Python] 常见问题

1. No module named xxxxxx

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named xxxxxx

**解决方法:**

import sys
sys.path.append('/usr/local/lib/python3.6/site-packages')
from PIL import Image

***
2. 安装第三方库，超时报错--Read timed out.
**设置超时时间即可**

pip --default-timeout=100 install -U Pillow

  示例代码为安装 “Pillow”
  [详细请点击这里](http://www.cnblogs.com/xiaoduc-org/p/5958973.html)
 
  ***
3. macOS 使用 pyenv 安装python 出现 "The Python zlib extension was not compiled ..."错误

xcode-select --install

  [详细请点击这里](http://stackoverflow.com/questions/34200602/the-python-zlib-extension-was-not-compiled-on-mac-os-x-10-11-1)

  ---
4. TypeError: 'module' object is not callable
  程序代码 

class Person:
#constructor
def init(self,name,sex):
self.Name = name
self.Sex = sex
def ToString(self):
return 'Name:'+self.Name+',Sex:'+self.Sex

报错输出

Traceback (most recent call last):
File "<pyshell#2>", line 1, in <module>
per = Person('dnawo','man')
TypeError: 'module' object is not callable

**原因分析：**
Python导入模块的方法有两种：import module 和 from module import，区别是前者所有导入的东西使用时需加上模块名的限定，而后者不要。
**正确的代码：**

person = Person.Person('dnawo','man')

  [参考文章](http://www.cnblogs.com/kungfupanda/archive/2012/08/09/2630784.html)

  ---