Python±ê×¼¿â tracebackÄ£¿é
Example 2-18 չʾÁË traceback Ä£¿éÔÊÐíÄãÔÚ³ÌÐòÀï´òÓ¡Òì³£µÄ¸ú×Ù·µ»Ø
(Traceback)ÐÅÏ¢, ÀàËÆÎ´²¶»ñÒ쳣ʱ½âÊÍÆ÷Ëù×öµÄ. Èç Example 2-18 Ëùʾ. 2.11.0.1. Example
2-18. ʹÓà traceback Ä£¿é´òÓ¡¸ú×Ù·µ»ØÐÅÏ¢ File: traceback-example-1.py # note!
import
Example 2-18 չʾÁË traceback Ä£¿éÔÊÐíÄãÔÚ³ÌÐòÀï´òÓ¡Òì³£µÄ¸ú×Ù·µ»Ø (Traceback)ÐÅÏ¢, ÀàËÆÎ´²¶»ñÒ쳣ʱ½âÊÍÆ÷Ëù×öµÄ. Èç Example 2-18 Ëùʾ.
2.11.0.1. Example 2-18. ʹÓà traceback Ä£¿é´òÓ¡¸ú×Ù·µ»ØÐÅÏ¢
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
# ×¢Òâ! µ¼Èë traceback »áÇåÀíµôÒ쳣״̬, ËùÒÔ
# ×îºÃ±ðÔÚÒì³£´¦Àí´úÂëÖе¼Èë¸ÃÄ£¿é
import traceback
try:
raise SyntaxError, "example"
except:
traceback.print_exc()
Traceback (innermost last):
File "traceback-example-1.py", line 7, in ?
SyntaxError: example
Example 2-19 ʹÓà StringIO Ä£¿é½«¸ú×Ù·µ»ØÐÅÏ¢·ÅÔÚ×Ö·û´®ÖÐ.
2.11.0.2. Example 2-19. ʹÓà traceback Ä£¿é½«¸ú×Ù·µ»ØÐÅÏ¢¸´ÖƵ½×Ö·û´®
File: traceback-example-2.py
import traceback
import StringIO
try:
raise IOError, "an i/o error occurred"
except:
fp = StringIO.StringIO()
traceback.print_exc(file=fp)
message = fp.getvalue()
print "failure! the error was:", repr(message)
failure! the error was: 'Traceback (innermost last):\012 File
"traceback-example-2.py", line 5, in ?\012IOError: an i/o error
occurred\012'
Äã¿ÉÒÔʹÓà extract_tb º¯Êý¸ñʽ»¯¸ú×Ù·µ»ØÐÅÏ¢, µÃµ½°üº¬´íÎóÐÅÏ¢µÄÁбí, Èç Example 2-20 Ëùʾ.
2.11.0.3. Example 2-20. ʹÓà traceback Module Ä£¿é±àÂë Traceback ¶ÔÏó
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 "=>
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'''
Created on 2009-9-2
@author: jiangqh
'''
import time,datetime
# date to str
print time.strftime("%Y-%m-%d %X", time.localtime())
#str to date
t = time.strptime("2009 - 08 - 08", "%Y - %m - %d")
y,m,d = t[0:3]
print datetime.datetime(y,m,d)
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self.fn = fn
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