June 2001
Intermediate to advanced
416 pages
10h 24m
English
Content preview from Python Essential Reference, Second Edition
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The apply() Function
The apply(func [, args [, kwargs ]]) function is used to invoke a function indirectly where the arguments have been constructed in the form of a tuple or dictionary. args is a tuple containing the positional argument to be supplied to the function. If omitted, no arguments are passed. kwargs is a dictionary containing keyword arguments. The following statements produce identical results:
foo(3,"x", name='Dave', id=12345)
apply(foo, (3,"x"), { 'name': 'Dave', 'id': 12345 }) In older versions of Python, apply() was the only mechanism for calling a function in which the arguments were contained in a tuple or dictionary. This capability is now handled by the following syntax:
a = (3,"x") b = { 'name' : 'Dave', 'id': 12345 ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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