Question

所以我试图保存subprocess.call的输出但是我一直收到以下错误： AttributeError: 'int' object has no attribute 'communicate'

代码如下：

p2 = subprocess.call(['./test.out', 'new_file.mfj', 'delete1.out'], stdout = PIPE)
output = p2.communicate[0]

Answer 1

您正在寻找subprocess.Popen()而不是call()。

您还需要将其更改为p2.communicate()[0]。

Answer 2

那是因为subprocess.call返回一个int：

subprocess.call(args, *, stdin=None, stdout=None, stderr=None, shell=False)

    Run the command described by args. Wait for command to complete, then return the returncode attribute.

看起来你想要subprocess.Popen().

这是我必须执行此操作的典型代码：

p = Popen(cmd, stdout=PIPE, stderr=PIPE, bufsize=256*1024*1024)
output, errors = p.communicate()
if p.returncode:
    raise Exception(errors)
else:
    # Print stdout from cmd call
    print output

Answer 3

您应该使用子流程

    try:            
        subprocess.check_output(['./test.out', 'new_file.mfj', 'delete1.out'], shell=True, stderr=subprocess.STDOUT)
    except subprocess.CalledProcessError as exception:
        print exception.output

Python：使用stdout从subprocess.call捕获输出

3 个答案: