subprocess.call和subprocess.check_output的区别
时间: 2023-06-05 16:05:48 浏览: 60
subprocess.call是用于执行外部程序的Python命令,而subprocess.check_output是在执行外部程序时获取其输出。subprocess.call返回程序的退出状态码,而subprocess.check_output返回程序的标准输出。
相关问题
subprocess.check_call
subprocess.check_call is a Python method that is used to execute a command or a program in a new process. It is a blocking call, which means that the calling process will wait for the command to complete before continuing execution. If the command returns a non-zero exit status, a CalledProcessError will be raised. This method is commonly used for running shell commands in Python scripts.
Syntax:
```
subprocess.check_call(args, *, stdin=None, stdout=None, stderr=None, shell=False, cwd=None, timeout=None, encoding=None, errors=None)
```
Parameters:
- args: A string or a sequence containing the command to be executed and its arguments.
- stdin: A file-like object representing the standard input of the command. If None, the standard input is redirected to /dev/null.
- stdout: A file-like object representing the standard output of the command. If None, the standard output is redirected to /dev/null.
- stderr: A file-like object representing the standard error of the command. If None, the standard error is redirected to stdout.
- shell: A boolean value indicating whether the command should be executed in a shell or not. If True, the command is executed in a shell. If False, the command is executed directly.
- cwd: The working directory in which the command should be executed.
- timeout: The maximum amount of time in seconds that the command is allowed to run. If the command takes longer than the specified timeout, a TimeoutExpired error is raised.
- encoding: The character encoding to be used for the standard input, output, and error streams.
- errors: The error handling strategy to be used for the standard input, output, and error streams.
Return Value:
- This method returns None if the command is executed successfully. If the command returns a non-zero exit status, a CalledProcessError is raised.
请将shell语句转化为pytthon: source ./get_directory_list.sh source ./printf_coloring.sh source ./check_directory.sh source ./check_tools_exist.sh check_all_directory_exist ./clean_output_directory.sh ./clean_build_directory.sh ./RebuildProject.sh
以下是将Shell语句转换为Python的等效代码:
```python
import subprocess
subprocess.call(["source", "./get_directory_list.sh"], shell=True)
subprocess.call(["source", "./printf_coloring.sh"], shell=True)
subprocess.call(["source", "./check_directory.sh"], shell=True)
subprocess.call(["source", "./check_tools_exist.sh"], shell=True)
subprocess.call(["check_all_directory_exist"], shell=True)
subprocess.call(["./clean_output_directory.sh"], shell=True)
subprocess.call(["./clean_build_directory.sh"], shell=True)
subprocess.call(["./RebuildProject.sh"], shell=True)
```
在Python中,您可以使用 `subprocess` 模块来执行Shell命令。上述代码使用 `subprocess.call` 函数来执行每个Shell命令,其中第一个参数是命令和参数的列表形式,`shell=True` 参数用于告诉Python运行一个Shell解释器来执行命令。请确保在运行代码之前安装了 `subprocess` 模块。