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bumsfeld 413 I know that lambda is some kind of function in Python. What does it do? Why would one use it?
What is Lambda in Python
bumsfeld 413 This Question has been Answered
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vegaseat 1,720 Python's lambda allows you to declare a one-line nameless minifunction on the fly. The format is:
lambda parameter(s): expression using the parameter(s)
It returns the result of the expression. The expression has to be a one-liner (no newlines)! Here is a little example ...
# sort strings in a list, case insensitive
import string
wordList = ['Python', 'is', 'really', 'great', 'stuff']
print "Original list:"
print wordList
wordList.sort()
print "After standard sort (ASCII upper case is before lower case):"
print wordList
wordList.sort(lambda x, y: cmp(string.lower(x), string.lower(y)))
print "After case insensitve sort with lambda and lower:"
print wordListI decided to put that also under "Starting Python".
Edited by vegaseat: n/a
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