Changes between Version 4 and Version 5 of Python3Support

Timestamp:

Aug 10, 2018, 2:50:00 PM (6 years ago)

Author:

sanjeet

Comment:

Added tables for py2p3 differences section

Python3Support

@@ -96 +96 @@
  * Unicodes == Strings
 
+{{{#!th style="background: #ddd"
+'''Label'''
+}}}
+{{{#!th style="background: #ddd"
+'''Python 2'''
+}}}
+{{{#!th style="background: #ddd"
+'''Python 3'''
+}}}
+|-----------------------
+{{{#!td 
+String:
+}}}
+{{{#!td 
+{{{
+>>> 'sample'
+'sample'
+}}}
+}}}
+{{{#!td 
+{{{
+>>> 'sample'
+'sample'
+}}}
+}}}
+|-----------------------
+{{{#!td 
+Unicode:
+}}}
+{{{#!td 
+{{{
+>>> 'sample'
+u'sample'
+}}}
+}}}
+{{{#!td 
+{{{
+>>> 'sample'
+'sample'
+}}}
+}}}
+|-----------------------
+{{{#!td 
+Bytes:
+}}}
+{{{#!td 
+{{{
+>>> b'sample'
+'sample'
+}}}
+}}}
+{{{#!td 
+{{{
+>>> b'sample'
+b'sample'
+}}}
+}}}
+|-----------------------
+{{{#!td 
+Types:
+}}}
+{{{#!td 
+{{{
+>>> type('xx'), type(u'xx'), type(b'xx')
+(<type 'str'>, <type 'unicode'>, <type 'str'>)
+}}}
+}}}
+{{{#!td 
+{{{
+>>> type('xx'), type(u'xx'), type(b'xx')
+(<class 'str'>, <class 'str'>, <class 'bytes'>)
+}}}
+}}}
+
+When special characters are involved:
+
+{{{#!th style="background: #ddd"
+'''Label'''
+}}}
+{{{#!th style="background: #ddd"
+'''Python 2'''
+}}}
+{{{#!th style="background: #ddd"
+'''Python 3'''
+}}}
+|-----------------------
+{{{#!td 
+String:
+}}}
+{{{#!td 
+{{{
+>>> 'Příšerný kůň'
+'P\xc5\x99\xc3\xad\xc5\xa1ern\xc3\xbd k\xc5\xaf\xc5\x88'
+}}}
+}}}
+{{{#!td 
+{{{
+>>> 'Příšerný kůň'
+'Příšerný kůň'
+}}}
+}}}
+|-----------------------
+{{{#!td 
+Unicode:
+}}}
+{{{#!td 
+{{{
+>>> u'Příšerný kůň'
+u'P\u0159\xed\u0161ern\xfd k\u016f\u0148'
+}}}
+}}}
+{{{#!td 
+{{{
+>>> u'Příšerný kůň'
+'Příšerný kůň'
+}}}
+}}}
+|-----------------------
+{{{#!td 
+Bytes:
+}}}
+{{{#!td 
+{{{
+>>> b'Příšerný kůň'
+'P\xc5\x99\xc3\xad\xc5\xa1ern\xc3\xbd k\xc5\xaf\xc5\x88'
+}}}
+}}}
+{{{#!td 
+{{{
+>>> b'Příšerný kůň'
+SyntaxError: bytes can only contain ASCII literal characters.
+}}}
+}}}
+
 For Python 3, bytes objects can not contain character literals other than ASCII, therefore, we use bytes() to convert from unicode/string to byte object.
 {{{
@@ -107 +241 @@
 }}}
 We already have encode and decode functions available in (from grass.script.utils import encode, decode) lib/python/script/utils.py that makes it easy for us to convert back and forth. To make it work with Python3, made changes in those functions to avoid syntax errors and exceptions.
-
 
 == How to write Python 3 compatible code