Question

Linux上的

我有以下名为visca.py的python源文件：

from subprocess import call
def recall(preset):
    call(["visca-cli", "memory_recall", str(preset)])

我在shell中打开python解释器并导入visca，然后输入visca.recall（0）并获取

Traceback (most recent call last):   File "<stdin>", line 1, in <module>   File "visca.py", line 13, in recall
    subprocess.call(["visca-cli", "memory_recall", str(preset)])   File "/usr/lib/python2.7/subprocess.py", line 493, in call
    return Popen(*popenargs, **kwargs).wait()   File "/usr/lib/python2.7/subprocess.py", line 629, in __init__
    raise TypeError("bufsize must be an integer") TypeError: bufsize must be an integer

但是，如果我直接在python shell中输入

>>> from subprocess import call
>>> call(["visca-cli", "memory_recall", "0"])
10 OK - no return value
0

它有效。有什么问题？

Answer 1

它告诉你bufsize must be an integer。我猜你在脚本中为preset设置的值不是整数（请记住0.0是浮点数，而不是整数）。通过在函数中打印出来，快速检查您的参数是什么。

python subprocess.call参数

1 个答案: