Download PDF by A. B.; Krainov, V.; Leggett, Anthony J.(translator) Migdal: Approximation Methods in Quantum Mechanics

By A. B.; Krainov, V.; Leggett, Anthony J.(translator) Migdal

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Settrace(None) # don't trace this call test(2) call test 3 -> None line test 3 -> None line test 4 -> None line test 5 -> None line test 5 -> None line test 6 -> None line test 5 -> None line test 7 -> None return test 7 -> 1 The pdb module provides a complete debugger framework, based on the tracing facilities offered by this function. Python Standard Library: Core Modules 1-57 Working with standard input and output The stdin, stdout and stderr variables contain stream objects corresponding to the standard I/O streams.

Python Standard Library: Core Modules 1-50 In contrast, deepcopy(object) -> object creates a "deep" copy of the given object. If the object is a container, all members are copied as well, recursively. deepcopy(a) print "before", "=>" print a print b # modify original a[0][0] = 0 a[1] = None print "after", "=>" print a print b before => [[1], [2], [3]] [[1], [2], [3]] after => [[0], None, [3]] [[1], [2], [3]] Python Standard Library: Core Modules 1-51 The sys module This module provides a number of functions and variables that can be used to manipulate different parts of the Python runtime environment.

Group(1) returns the contents of the first group, group(2) the contents of the second, etc. If you pass several group numbers to the group function, it returns a tuple. group(1, 2, 3) ('10', '15', '99') The search function searches for the pattern inside the string. It basically tries the pattern at every possible characters position, starting from the left, and returns a match object as soon it has found a match. If the pattern doesn't match anywhere, it returns None. group(0) print date 10 25 95 10 25 95 10/25/95 Python Standard Library: Core Modules 1-44 The sub function can be used to replace patterns with another string.

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