traceback 模块允许你在程序里打印异常的跟踪返回 (Traceback)信息
1.1 traceback.print_exc()
File: traceback-example-1.py
# note! importing the traceback module messes up the
# exception state, so you better do that here and not
# in the exception handler
# 注意! 导入 traceback 会清理掉异常状态, 所以
# 最好别在异常处理代码中导入该模块
import traceback
try:
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.py
import traceback
import sys
def 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-example-3.py line 8 in ?
=> 'function()'
traceback-example-3.py line 5 in function
=> 'raise IOError, "an i/o error occurred"'
** exceptions.IOError: an i/o error occurred
1.3 traceback.extract_stack
import sys,traceback,os
def lumberjack():
bright_side_of_death()
def bright_side_of_death():
print traceback.extract_stack()
return 0
if __name__ == '__main__':
lumberjack()
运行结果:
[('D:\train\python\sample\traceback\sample.py', 12, '', '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()')]
最后
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