如何在文本文件中展開包裝的行，重新格式化文本文件

Question

我需要幫助找到一個Python解決方案來重新格式化包裝的行/重寫日志文件，所以沒有描述的換行符。 這將使我能夠繼續在不間斷的線路上找到。

* .log中的每個條目都帶有時間戳。 太長的行按預期包裝，但是：包裹的部分也帶有時間戳。 “>”（大於）是一條線已經包裹的唯一指示 - 發生在位置37上。>日志來自* nix機器。

我不知道怎么開始......

2011-223-18:31:11.737  VWR:tao       abc exec /home/abcd/abcd9.94/bin/set_specb.tcl -s DL 2242.500000 5
2011-223-18:31:11.737                > -20.000000 10
###needs to be rewritten as:
2011-223-18:31:11.737  VWR:tao       abc exec /home/abcd/abcd9.94/bin/set_specb.tcl -s DL 2242.500000 5 -20.000000 10

而另一個

2011-223-17:40:07.039  EVT:703       agc_drift_cal.tcl: out of tolerance drift of 5.3080163871 detected! Downlink Alignmen
2011-223-17:40:07.039                >t check required.
###these lines deleted and consolodated as one:
2011-223-17:40:07.039  EVT:703       agc_drift_cal.tcl: out of tolerance drift of 5.3080163871 detected! Downlink Alignment check required.

我不知道如何開始，除了......

for filename in validfilelist:
    logfile = open(filename, 'r')
    logfile_list = logfile.readlines()
    logfile.close
    for line in logfile_list:

Answer 1

for filename in validfilelist:
    logfile = open(filename, 'r')
    logfile_list = logfile.readlines()
    logfile.close()
    for line in logfile_list:
        if(line[21:].strip()[0] == '>'):
           #line_is_broken
        else:
           #line_is_not_broken

Answer 2

#!/usr/bin/python

import re

#2011-223-18:31:11.737                > -20.000000 10
ptn_wrp = re.compile(r"^\d+-\d+-\d+:\d+:\d+.\d+\s+>(.*)$")

validfilelist = ["log1.txt", "log2.txt"]

for filename in validfilelist:
    logfile = open(filename, 'r')
    logfile_new = open("%s.new" % filename, 'w')
    for line in logfile:
        line = line.rstrip('\n')
        m = ptn_wrp.match(line)
        if m:
            logfile_new.write(m.group(1))
        else:
            logfile_new.write("\n")
            logfile_new.write(line)
    logfile_new.write("\n")
    logfile.close()
    logfile_new.close()

當行不是換行時寫新行。 唯一的副作用是開頭的空行。 不應該是日志分析的問題。 新文件是處理結果。

Answer 3

如果你將它包裝在filecontext中，這將成功：

f = [
    "2011-223-18:31:11.737  VWR:tao       abc exec /home/abcd/abcd9.94/bin/set_specb.tcl -s DL 2242.500000 5",
    "2011-223-18:31:11.737                > -20.000000 10",
    "2011-223-17:40:07.039  EVT:703       agc_drift_cal.tcl: out of tolerance drift of 5.3080163871 detected! Downlink Alignmen",
    "2011-223-17:40:07.039                >t check required.",
    ]

import re

wrapped_line = "\d{4}-\d{3}-\d{2}:\d{2}:\d{2}\.\d{3} *>(.*$)"

result = [""]
for line in f:
    thematch = re.match(wrapped_line,line)
    if thematch:
        result[-1] += thematch.group(1)
    else:
        result.append(line)

print result