求助python的MemoryError问题
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悬赏园豆：30
[已关闭问题]
关闭于 2012-04-22 13:32
在一个项目中，我使用了python日志中的RotatingFileHandler，但是这个有一个bug，所以我自定义了一个类继承，并修改了其中的方法，不过现在有一个这样的问题，当程序连续运行2,3天，就会报如下的错误：
Traceback (most recent call last):
File "logging\__init__.pyc", line 776, in emit
File "logging\__init__.pyc", line 654, in format
File "logging\__init__.pyc", line 438, in format
File "logging\__init__.pyc", line 404, in formatTime
MemoryError
其中我写的自定义日志类如下：
import codecs
import logging
from logging.handlers import RotatingFileHandler
import os
class customLog(RotatingFileHandler):
def __init__(self, filename, mode='a', maxBytes=0, backupCount=0, encoding=None, delay=0):
if maxBytes > 0:
mode = 'a' # doesn't make sense otherwise!
self.maxBytes = maxBytes
self.backupCount = backupCount
RotatingFileHandler.__init__(self, filename, mode, maxBytes, backupCount, encoding,delay)
def doRollover(self):
"""
Do a rollover, as described in __init__().
"""
self.stream.close()
try:
if self.backupCount > 0:
for i in range(self.backupCount - 1, 0, -1):
sfn = "%s.%d" % (self.baseFilename, i)
dfn = "%s.%d" % (self.baseFilename, i + 1)
if os.path.exists(sfn):
# print "%s -> %s" % (sfn, dfn)
if os.path.exists(dfn):
os.remove(dfn)
os.rename(sfn, dfn)
dfn = self.baseFilename + ".1"
if os.path.exists(dfn):
os.remove(dfn)
os.rename(self.baseFilename, dfn)
# print "%s -> %s" % (self.baseFilename, dfn)
except Exception:
pass
#print "doRollover"
finally:
if self.encoding:
self.stream = codecs.open(self.baseFilename, 'w', self.encoding)
else:
self.stream = open(self.baseFilename, 'w')
def shouldRollover(self, record):
"""
Determine if rollover should occur.
Basically, see if the supplied record would cause the file to exceed
the size limit we have.
"""
if self.stream is None: # delay was set...
self.stream = self._open()
if self.maxBytes > 0: # are we rolling over?
msg = ""
try:
msg = "%s\n" % self.format(record)
self.stream.seek(0, 2) #due to non-posix-compliant Windows feature
except :
print "shouldRollover"
if self.stream.tell() + len(msg) >= self.maxBytes:
return 1
return 0
def emit(self, record):
"""
Emit a record.
Output the record to the file, catering for rollover as described
in doRollover().
"""
try:
if self.shouldRollover(record):
self.doRollover()
logging.FileHandler.emit(self, record)
except (KeyboardInterrupt, SystemExit):
print "error"
#raise
except:
self.handleError(record)
