Python2 and Python3 Codes

Python2 encoding

Unicode:unicode Hello u ' \u4f60\u597d '
| | | |
Encode (' UTF8 ') | |decode (' UTF8 ') encode (' GBK ') | |decode (' GBK ')
| | | |
UTF8 GBK
Encoded STR ' \XE4\XBD\XA0\XE5\XA5\XBD ' encoded GBK u ' \U6D63\U72B2\U30BD '

# str:bytes

' Hello World ' Print repr (s) ' \xe4\xbd\xa0\xe5\xa5\xbd World ' Print Len (s) Print type (s) ' Str '>

# Unicode:unicode

>>> s = u' Hello World'print  repr (s) u'\u4f60\u597d World'printprint  type (s)'Unicode '>

#unicode: No matter what character has a counterpart in Unicode.

Features of Python2
1. In Python2, print bytes are converted to Unicode

2.python2 in the default ASCII encoding
[email protected] ~]# cat python.py
#coding: UTF8 # tells the interpreter to encode UTF8
print ' Hello '

Python3 encoding
UTF8 encoded by default in Python3

Str:unicode Hello u ' \u4f60\u597d '
| | | |
Encode (' UTF8 ') | |decode (' UTF8 ') encode (' GBK ') | |decode (' GBK ')
| | | |
UTF8 GBK
Encoded STR ' \XE4\XBD\XA0\XE5\XA5\XBD ' encoded GBK u ' \U6D63\U72B2\U30BD '

' Hello World ' Print (Json.dumps (s)) " \u4f60\u597d World " Print (Len (s)) Print (type (s))<class'str'>

Encoding and decoding mode 1:

>>> s ='Hello World'>>> B = S.encode ('UTF8')>>>Print(b) B'\xe4\xbd\xa0\xe5\xa5\xbd World'>>> s = B.decode ('UTF8')>>>Print(s) Hello world>>> s = B.decode ('GBK')>>>Print(s) raccoon à ソworld

Encoding and decoding mode 2:

>>> s ='Hello World'>>> B = bytes (S,'GBK')>>>Print(b) B'\xc4\xe3\xba\xc3 World'>>> s = str (b,'GBK')>>>Print(s) Hello world>>> s ='Hello World'>>> B = bytes (S,'UTF8') >>>Print(b) B'\xe4\xbd\xa0\xe5\xa5\xbd World'>>> s = str (b,'UTF8')>>>Print(s) Hello world>>> s = str (b,'GBK') >>>Print(s) raccoon à ソworld

Python2 and Python3 Codes