0
上下文:我試圖找到一個python包的github存儲庫。要做到這一點,我是zgrep'ping包歸檔github網址。它正常工作,直到我限制輸出1分的結果:subprocess.check_output(),zgrep和匹配限制
# works, returns a lot of results
subprocess.check_output(["zgrep", "-oha", "github", 'Django-1.10.1.tgz']) # works, a lot of results
# add -m1 to limit output, returns status 2 (doesn't work)
subprocess.check_output(["zgrep", "-m1", "-oha", "github", 'Django-1.10.1.tgz']) # works, a lot of results
# same command, different file - works
subprocess.check_output(["zgrep", "-m1", "-oha", "github", 'grabber.py'])
在命令行中,所有三個命令做工精細。有任何想法嗎?
回溯:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.7/subprocess.py", line 574, in check_output
raise CalledProcessError(retcode, cmd, output=output)
subprocess.CalledProcessError: Command '['zgrep', '-m1', '-oha', 'github', 'pkgs/Django-1.10.1.tar.gz']' returned non-zero exit status 2
命令行:
$ zgrep -m1 -oha "github.com/[^/]\+/django" pkgs/Django-1.10.1.tar.gz
github.com/django/django
'zgrep'是(顯然)返回了一個非零退出狀態...只是因爲命令打印上的東西命令行並不意味着它有0退出狀態。運行commmand後立即嘗試'echo $?' - 是否爲'0'? – mgilson
@mgilson,對不起,我之前沒有提及它。是的,如果從控制檯啓動,它將返回0狀態。只有在發生錯誤時,Grep纔會返回狀態2(1表示不匹配) – Marat
upd:'grep'對於Python中的'-m1'也可以正常工作 – Marat