grep带引号

Question

我需要找到这样的字符串Job 'Initialize' completed successfully并从python运行此命令。

所以shell grep -c "Job 'Initialize' completed" 1.log工作正常但是这个命令在python中看起来怎么样？ cmd = """grep -c "Job 'Initialize' completed" 1.log"""？

Answer 1

这对子进程很容易：

subprocess.call(['grep','-c',"Job 'Initialize' completed", '1.log'])

Answer 2

如果你想使用Python，那就使用Python：

with open('1.log') as f:
    count = 0
    for line in f:
        if "Job 'Initialize' completed" in line:
            count += 1
print "Count: {}".format(count)

或

with open('1.log') as f:
    count = sum(1 for line in f if "Job 'Initialize' completed" in line)
print "Count: {}".format(count)

Answer 3

shell命令可以在python中以三引号的形式执行，并将shell = True传递给subprocess.call。请注意，根据文档“如果与不受信任的输入结合使用，则调用具有shell = True的系统shell可能存在安全隐患”

 subprocess.call(''' grep -c "Job 'Initialize' completed" 1.log ''', shell=True)