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python subprocess错误怎么处理

小樊
81
2024-11-16 16:04:44
栏目: 编程语言

在Python中,subprocess模块用于执行外部命令

  1. 使用subprocess.run()执行外部命令并获取结果:
import subprocess

result = subprocess.run(['ls', '-l'], capture_output=True, text=True)
print(result.stdout)
  1. 检查subprocess.run()的返回码:
import subprocess

result = subprocess.run(['ls', '-l'], capture_output=True, text=True)
if result.returncode != 0:
    print(f"Error occurred: {result.stderr}")
else:
    print(result.stdout)
  1. 使用subprocess.Popen()进行更复杂的操作:
import subprocess

process = subprocess.Popen(['ls', '-l'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
stdout, stderr = process.communicate()

if process.returncode != 0:
    print(f"Error occurred: {stderr}")
else:
    print(stdout)
  1. 使用try-except捕获异常:
import subprocess

try:
    result = subprocess.run(['ls', '-l'], capture_output=True, text=True, check=True)
    print(result.stdout)
except subprocess.CalledProcessError as e:
    print(f"Error occurred: {e.stderr}")
  1. 使用subprocess.check_output()执行外部命令并检查输出:
import subprocess

try:
    output = subprocess.check_output(['ls', '-l'], stderr=subprocess.STDOUT, text=True)
    print(output)
except subprocess.CalledProcessError as e:
    print(f"Error occurred: {e.output}")

这些示例展示了如何处理subprocess模块中的错误。根据你的需求,你可以选择合适的方法来处理错误。

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