为了合并几个好几十兆的文本文件到一个，使用复制，粘贴时，发现一次复制不完。所以，就写了这个东东：

import os

class FileIntegrater(object):
    def __init__(self, fn):
        self._fhandle = open(fn, 'a+')
        self.length = len(self._fhandle.readlines())

    def append(self, fn):
        _contents = []
        if os.path.isfile(fn):
            _contents = open(fn, 'rb').readlines()
            _len = len(_contents)
            self._fhandle.writelines(_contents)
            self._fhandle.flush()            
            self.length += _len
            print 'INFO:', fn, '[length: ' + repr(_len) + ']', 'has been appended.'
        else:
            print 'ERROR:', fn, 'is not a file.'
            return

    def close(self):
        self._fhandle.close()
            


if __name__ == '__main__':
    fi = FileIntegrater('e:/log/cn1res1.roboo.com_editsystem_20080511_1.log')
    fi.append('e:/log/editsystem.log.3')
    fi.append('e:/log/editsystem.log.2')
    fi.append('e:/log/editsystem.log.1')
    fi.append('e:/log/editsystem.log')
    print fi.length
    fi.close()
    
    os.remove('e:/log/cn1res1.roboo.com_editsystem_20080511_1.log')