python中文件中的全局模块

Question

任何人都可以帮助我如何在python文件中声明全局变量

在下面的python文件中，我声明了全局变量var1：

 File locations for settings.py:
/usr/lib/python2.7/site-packages/project/settings.py

settings.py

global var1
var1 = ""

python file2.py：

 Location:
/usr/lib/python2.7/site-packages/file2.py

file2.py

from dev import fullchip
from project import settings
a = 10
b = 20
fullchip.count (a, b)
print var1

脚本fullchip.py

 location
 /usr/lib/python2.7/site-packages/dev/fullchip.py 

脚本fullchip.py

 from projects import settings
 def count(a, b):
     global var
     var1 = a + b

我正在运行file2.py

我期望var1打印“ 30”，但我却未定义var1。 基本上我想在所有文件中使用var1作为全局变量

Answer 1

问题 ：我期望var1打印“ 20”，但我无法确定var1

1. 拼写错误的project和projects

   settings.py的文件位置：
   /usr/lib/python2.7/site-packages/project/settings.py

   但使用

   from projects import settings

2. 这对我有用，不需要global ：

    from dev import fullchip from project import settings a = 10 b = 20 fullchip.count (a, b) print(settings.var1) 

输出量

30