Implement dictionary derivation in Python2.6 version 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/
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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

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

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#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 '}

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