正則表達式非常擅長解決像這樣的問題 - 即解析日誌文件記錄。 MarcoS的答案很好地解決了你的直接問題。然而，另一種方法是編寫一個（可重用）泛化函數，將日誌文件記錄分解爲各種組件，並返回包含所有這些解析組件的匹配對象。一旦分解，測試可以很容易地應用到組件部分以檢查各種需求（例如輸入文件路徑必須以ABC或DEF結束）。這裏是一個具有這樣一個功能的python腳本：decomposeLogEntry()並演示瞭如何使用它的手來解決問題：
import re
def decomposeLogEntry(text):
r""" Decompose log file entry into its various components.
If text is a valid log entry, return regex match object of
log entry components strings. Otherwise return None."""
return re.match(r"""
# Decompose log file entry into its various components.
^ # Anchor to start of string
(?P<time>\d\d:\d\d:\d\d) # Capture: time
\s+
(?P<modname>\w+?) # Capture module name
\s-\s\[
(?P<msgtype>[^]]+) # Capture message type
\]
(?P<message>[^!]+) # Capture message text
!!\sftp_site=
(?P<ftpsite>\S+?) # Capture ftp URL
\sfile_dir=
(?P<filedir>\S+?) # Capture file directory?
\sinput\sfile=
(?P<infile> # Capture input path and filename
(?P<infilepath>\S+)\\ # Capture input file path
(?P<infilename>[^\s\\]+) # Capture input file filename
)
\soutput\sfile=
(?P<outfile> # Capture input path and filename
(?P<outfilepath>\S+)\\ # Capture output file path
(?P<outfilename>[^\s\\]+) # Capture output file filename
)
\s* # Optional whitespace at end.
$ # Anchor to end of string
""", text, re.IGNORECASE | re.VERBOSE)
# Demonstrate decomposeLogEntry function. Print components of all log entries.
f=open("testdata.log")
mcnt = 0
for line in f:
# Decompose this line into its components.
m = decomposeLogEntry(line)
if m:
mcnt += 1
print "Match number %d" % (mcnt)
print " Time: %s" % m.group("time")
print " Module name: %s" % m.group("modname")
print " Message type: %s" % m.group("time")
print " Message: %s" % m.group("message")
print " FTP site URL: %s" % m.group("ftpsite")
print " Input file: %s" % m.group("infile")
print " Input file path: %s" % m.group("infilepath")
print " Input file name: %s" % m.group("infilename")
print " Output file: %s" % m.group("outfile")
print " Output file path: %s" % m.group("outfilepath")
print " Output file name: %s" % m.group("outfilename")
print "\n",
f.close()
# Next pick out only the desired data.
f=open("testdata.log")
mcnt = 0
matches = []
for line in f:
# Decompose this line into its components.
m = decomposeLogEntry(line)
if m:
# See if this record meets desired requirements
if re.search(r"ABC$|DEF$", m.group("infilepath")):
matches.append(line)
f.close()
print "There were %d matching records" % len(matches)
此功能不僅挑選出你有興趣，它的各個部分也驗證輸入並拒絕格式不正確的記錄。一旦寫入和調試完畢，該功能可以被其他需要分析日誌文件以滿足其他需求的程序重複使用。
下面是從腳本的輸出時，應用到您的測試數據：
r"""
Match number 1
Time: 08:38:36
Module name: TestModule
Message type: 08:38:36
Message: result success
FTP site URL: ftp.test.com
Input file: \root\level1\level2-ABC\2C.013000000B.dat
Input file path: \root\level1\level2-ABC
Input file name: 2C.013000000B.dat
Output file: c:\local\project1\data\2C.013000000B.dat.ext
Output file path: c:\local\project1\data
Output file name: 2C.013000000B.dat.ext
Match number 2
Time: 06:40:37
Module name: TestModule
Message type: 06:40:37
Message: result success
FTP site URL: ftp.test.com
Input file: \root\level1\level2-ABC\20100722B.TXT
Input file path: \root\level1\level2-ABC
Input file name: 20100722B.TXT
Output file: c:\local\project1\data\20100722B.TXT.ext
Output file path: c:\local\project1\data
Output file name: 20100722B.TXT.ext
Match number 3
Time: 06:40:39
Module name: TestModule
Message type: 06:40:39
Message: result success
FTP site URL: ftp.test.com
Input file: \root\level1\level2-DEF\20100722D1-XYZ.TXT
Input file path: \root\level1\level2-DEF
Input file name: 20100722D1-XYZ.TXT
Output file: c:\local\project1\data\20100722D1-YFP.TXT.ext
Output file path: c:\local\project1\data
Output file name: 20100722D1-YFP.TXT.ext
Match number 4
Time: 06:40:42
Module name: TestModule
Message type: 06:40:42
Message: result success
FTP site URL: ftp.test.com
Input file: \root\level1\level2-DEF\2C.250B
Input file path: \root\level1\level2-DEF
Input file name: 2C.250B
Output file: c:\local\project1\data\2C.250B.ext
Output file path: c:\local\project1\data
Output file name: 2C.250B.ext
There were 4 matching records
"""
非常感謝你。 – user729544 2011-04-28 15:15:11