The __future__ of Python module learning

After each program has been updated, it will be changed compared to the previous version. These changes will cause the user of the program to be a little trouble!

For example, python2.xx and 3.xx changes, enough to make the novice head big!

In 3,

U ' xxx ' and ' xxx ' are both string types (3 kinds of keywords are changed to class, headache!) ）

B ' xxx ' denotes byte type

In 2 species,

U ' xxx ' type is unicode,b ' xxx ' is a string type

It's so dizzy! Pay attention to the difference between 3 and 2 every time!

So, the __future__ module appeared! For changes of 3 and 2 text types, just add the following at the beginning of the module:

From __future__ import unicode_literals

Then do not worry about 2 and 3 will appear text-related errors!

The __future__ of Python module learning