The traceback of Python

Traceback module allows you to print abnormal trace return (traceback) information in the program 1.1 Traceback.print_exc ()

file:traceback-example-1.py# note! Importing the Traceback module messes up the# exception state, so you better does that here and not# in the exception handle r# Note! Importing Traceback will clean up the exception state, so it is best not to import the module in the exception handling code imports Tracebacktry:    raise SyntaxError, "example" except:    Traceback.print_exc () Traceback (innermost last):  File "traceback-example-1.py", line 7, in? Syntaxerror:example

1.2 TRACEBACK.EXTRACT_TB

File:traceback-example-3.pyimport tracebackimport sysdef function ():    raise IOError, "an I/O error occurred" try:    function () except:    info = sys.exc_info () for    file, Lineno, function, text in TRACEBACK.EXTRACT_TB (info[2]) :        print file, "line", Lineno, "in", function        print "=", repr (text)    print "* *%s:%s"% info[:2]traceback-e xample-3.py line 8 in?=> ' function () ' traceback-example-3.py line 5 in function=> ' Raise IOError, "an I/O error OCCU Rred "' * * exceptions. Ioerror:an I/O error occurred

1.3 Traceback.extract_stack

Import Sys,traceback,osdef Lumberjack ():    Bright_side_of_death () def bright_side_of_death ():    print Traceback.extract_stack ()    return 0if __name__ = = ' __main__ ':    lumberjack ()

Operation Result:

[' d:\\train\\python\\sample\\traceback\\sample.py ', ' <module> ', ' Lumberjack () '), (' d:\\train\\python\\ Sample\\traceback\\sample.py ', 4, ' Lumberjack ', ' Bright_side_of_death () '), (' D:\\train\\python\\sample\\traceback\ \sample.py ', 8, ' Bright_side_of_death ', ' Print traceback.extract_stack () ')]

　　

　　

The traceback of Python