Release Date
|
2008 |
2000 |
Function print
|
print ("hello") |
print "hello" |
| Division of Integers |
Whenever two integers are divided, you get a float value |
When two integers are divided, you always provide integer value. |
Unicode
|
In Python 3, default storing of strings is Unicode. |
To store Unicode string value, you require to define them with "u". |
Syntax
|
The syntax is simpler and easily understandable. |
The syntax of Python 2 was comparatively difficult to understand. |
| Rules of ordering Comparisons |
In this version, Rules of ordering comparisons have been simplified. |
Rules of ordering comparison are very complex. |
Iteration
|
The new Range() function introduced to perform iterations. |
In Python 2, the xrange() is used for iterations. |
Exceptions
|
It should be enclosed in parenthesis. |
It should be enclosed in notations. |
Leak of variables
|
The value of variables never changes. |
The value of the global variable will change while using it inside for-loop. |
| Backward compatibility |
Not difficult to port python 2 to python 3 but it is never reliable. |
Python version 3 is not backwardly compatible with Python 2. |
Library
|
Many recent developers are creating libraries which you can only use with Python 3. |
Many older libraries created for Python 2 is not forward-compatible. |
