Coding problem Solving in Python

In the py2.7 project with the __future__ module in the Unicode_literals to prepare for compatible py3.x, today encountered a unicodeencodeerror error, followed, found that this small pit is worth noting. What kind of a pit is it? Follow the code to see. By the way, the principle.
1. Unicode_literals Version not introduced

The code is as follows	Copy Code
#coding: Utf-8 From datetime import datetime now = DateTime.Now () Print Now.strftime ('%m month%d days%h:%m ')

This code can perform the output correctly: March 12 21:53
2. Introduction of Unicode_literals

The code is as follows	Copy Code
#coding: Utf-8 From __future__ import unicode_literals From datetime import datetime now = DateTime.Now () Print Now.strftime ('%m month%d days%h:%m ')

The following error was thrown:

Traceback (most recent call last):
File "unicode_error_demo2.py", line 7, in <module>
Print Now.strftime ('%m month%d days%h:%m ')
Unicodeencodeerror: ' ASCII ' codec can ' t encode character U ' u6708 ' in position-not in range (128)

3. Solution One: Set Run-time encoding to Utf-8

The code is as follows	Copy Code
#coding: Utf-8 From __future__ import unicode_literals Import Sys From datetime import datetime Reload (SYS) Sys.setdefaultencoding (' Utf-8 ') now = DateTime.Now () Print Now.strftime ('%m month%d days%h:%m ')

Normal execution

4. Solution Two: Use byte string

code is as follows	copy code
#coding: Utf-8 from __future__ import unicode_literals to datetime import datetime now = DateTime.Now () Print Now.strftime (b '%m month%d%h:%m ')   # is indicated as the ByteArray string # or it is also OK T = ByteArray ('%m month%d%h:%m ', ' utf-8 ') Print Now.strftime (str (t))