使用python从某一行中找出空行的行号

Question

我有一个包含堆栈跟踪的文件。我的想法是在这个文件中搜索某个单词，如果找到了，就把该行的内容放到下一个空行。下面是我的密码-

tdfilename = r"C:\Users\Dev\Desktop\dummystacktrace"
tdf = open(tdfilename)
for num, l in enumerate(tdf, 1):
    if "java.lang.Thread.State: RUNNABLE" in l:
        runnable += 1
    if "java.lang.Thread.State: WAITING (on object monitor)" in l:
        objmonitorwaiting += 1
        linenum = num
tdf.close()

我能够得到我找到的字符串的行号（linenum），这里我搜索的字符串是java.lang.Thread.State: WAITING (on object monitor)，但是我如何得到从该点（linenum）即第2行到第10行或第111行的下一个空行的行号，并将所有细节保存到一个变量中。你知道吗

虚拟堆栈跟踪-

"Agent Execution" #10 daemon prio=5 os_prio=0 tid=0x000074563546f83c4c28000 nid=0x66760e in Object.wait() [0x00007f834737776cf000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000000800567670b280> (a com.wily.util.adt.BlockingQueue)
    at java.lang.Object.wait(Object.java:502)
    at com.wily.util.adt.BlockingQueue.interruptableDequeue(BlockingQueue.java:123)
    - locked <0x00000000800567670b280> (a com.wily.util.adt.BlockingQueue)
    at com.wily.util.task.AsynchExecutionQueue.doTask(AsynchExecutionQueue.java:200)
    at com.wily.util.task.ATask$CoreTask.run(ATask.java:132)
    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
    - None

"Thread Monitor Heartbeat Heartbeat" #6 daemon prio=5 os_prio=0 tid=0x0000342523454c4c26000 nid=0x2260d in Object.wait() [0x00007f8789078903777d0000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x000000008057567004b38> (a com.wily.util.heartbeat.IntervalHeartbeat)
    at java.lang.Object.wait(Object.java:502)
    at com.wily.util.heartbeat.IntervalHeartbeat.waitForBehaviorIfEmpty(IntervalHeartbeat.java:570)
    - locked <0x000000008057567004b38> (a com.wily.util.heartbeat.IntervalHeartbeat)
    at com.wily.util.heartbeat.IntervalHeartbeat.access$1(IntervalHeartbeat.java:562)
    at com.wily.util.heartbeat.IntervalHeartbeat$HeartbeatRunnable.run(IntervalHeartbeat.java:667)
    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
    - None

"Agent Heartbeat" #5 daemon prio=5 os_prio=0 tid=0x00007f834567465c4c24000 nid=0x60c sleeping[0x00007f8757563778d1000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at com.wily.util.heartbeat.IntervalHeartbeat$HeartbeatRunnable.run(IntervalHeartbeat.java:673)
    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
    - None

请澄清。你知道吗

Answer 1

你可以边走边把它们存起来。不需要追踪行号。你知道吗

appending标志跟踪您是否在需要保存的段中。如果需要为每个文件获取多个节，结构可能会变得更复杂，但基本思想是相同的。你知道吗

tdfilename = r"C:\Users\Dev\Desktop\dummystacktrace"
tdf = open(tdfilename)
appending = False
lines = []
for num, l in enumerate(tdf, 1):
    if appending:
        if l.strip():
            lines.append(l)
        else:
            appending = False
    if "java.lang.Thread.State: RUNNABLE" in l:
        runnable += 1
    if "java.lang.Thread.State: WAITING (on object monitor)" in l:
        objmonitorwaiting += 1
        linenum = num
        appending = True
tdf.close()

Answer 2

在python中使用字符串固有的布尔性质。你知道吗

tdfilename = r"C:\Users\Dev\Desktop\dummystacktrace"
tdf = open(tdfilename)
endnum = None
for num, l in enumerate(tdf, 1):
    if "java.lang.Thread.State: RUNNABLE" in l:
        runnable += 1
    if "java.lang.Thread.State: WAITING (on object monitor)" in l:
        objmonitorwaiting += 1
        linenum = num
    if not l.strip() and num > linenum and endnum is None:
        end_num = num
tdf.close()