python - 对消息进行 grepping 时，bufsize 必须是整数错误

Question

我在尝试使用 grep 查找由日志中的多行组成的消息时遇到以下错误...谁能提供有关如何克服此错误的输入？

代码：-

    print gerrit_commitmsg
    gerritlog = Popen('git','log','--grep','gerrit_commitmsg', stdout=PIPE, stderr=PIPE)
    print gerritlog

错误：-

Commit message:-

Build system changes

Build system changes to include packages in the build

Change-Id: I697558f01ae367d2baacdf2c7fcf1a03753edacd

Traceback (most recent call last):
  File "gerrits_in_workspace.py", line 87, in <module>
    main()
  File "gerrits_in_workspace.py", line 77, in main
    grep_commitmsg(gerrit_commitmsg)
  File "gerrits_in_workspace.py", line 48, in grep_commitmsg
    gerritlog = Popen('git','log','--grep','gerrit_commitmsg', stdout=PIPE, stderr=PIPE)
  File "/usr/lib/python2.7/subprocess.py", line 629, in __init__
    raise TypeError("bufsize must be an integer")

Answer 1

该类subprocess.Popen需要一个像这样的参数列表：

Popen(args, bufsize=0, ...)

所以你通过它：

• args=git
• bufsize=log

因此错误（bufsize需要一个整数值）。命令向量需要是一个列表，如下所示：

gerritlog = Popen(['git','log','--grep','gerrit_commitmsg'], stdout=PIPE, stderr=PIPE)