I have met once before, this time in the group also encountered a few times a problem
A program written in python2.7. The dictionary derivation is used, but the server version number is python2.6 and cannot be executed.
Today checked the next about Dict comprehensions, in pep274 have clear explanation.
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.
What do we do with the 2.6 version number, which is useful for a loop to solve?
#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