[Python] Dictionary derivation PEP 274--Dict comprehensions

I have met once before, this time in the group also encountered a few times a problem

A program written in python2.7, which uses a dictionary derivation, but the server version is python2.6, unable to run.

Today, we checked the following about Dict comprehensions, which is clearly stated in pep274.

http://legacy.python.org/dev/peps/pep-0274/

Implementation

    All implementation details were resolved in the Python 2.7 and 3.0    time-frame.

This was added after 2.7.

2.6 Version of how we use it, in fact, with a For loop to solve the better

#表达式写法In [4]: print {I:CHR (65+i) for I in range (4)}{0: ' A ', 1: ' B ', 2: ' C ', 3: ' D '}

#for循环写法In [5]: D = {}in [6]: For I in range (4):   ...:     d[i] = chr (65+i)   ...: in [7]: Print d{0: ' A ', 1: ' B ', 2: ' C ', 3: ' D '}

This article is derived from"Orangleliu Notebook" Blog, be sure to keep this source http://blog.csdn.net/orangleliu/article/details/39895669

[Python] Dictionary derivation PEP 274--Dict comprehensions