Learning Python: Chapter 17
Wednesday, 27 February 2008
- Anonymous functions are declared with lambda instead of def.
- Lambda definitions are expressions and may therefore not contain if-statements and the like.
map(foo, list1, list2, list3)is like[foo(*tuple) for tuple in zip(list1, list2, list3)].- By using yield instead of return to provide a return value, you create a function that returns a generator object that returns one result at a time, somewhat like xrange.
(expression for item in iterable)is like
def foo():
for item in iterable:
yield expression
foo() - Functions that don’t return anything explicitly return
None.
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