How to open the command line window in python

How to open a command line window in Python? Import the subprocess module, create an object using subprocess.Popen, set shell=True (optional), and use the Popen object to interact with the command line window.

How to open a command line window using Python

The method to open a command line window in Python is very simple. The following steps will guide you through the process:

1. Import the Subprocess module

First, you need to import Python's subprocess module, which Allows you to execute system commands from within Python code.

<code class="python">import subprocess</code>

2. Create a subprocess.Popen object

Next, use subprocess.Popen to create an object that represents the Order. Here we specify cmd.exe or command.com (for Windows) or bash (for macOS/Linux).

<code class="python">subprocess.Popen("cmd.exe", shell=True)</code>

3. Setting shell=True (optional)

In Windows, setting shell=True is optional, but it Allows you to execute more complex commands from the command line. On macOS/Linux, this parameter has no effect.

4. Using the Popen Object

You can now interact with the command line window using the Popen object:

• communicate(): Send input and get output and error information.
• wait(): Wait for the command to complete and return the exit code.
• kill(): Terminate the command.

Sample code:

The following is a sample code to open a command line window using Python and run some commands:

<code class="python">import subprocess

# 打开命令行窗口
subprocess.Popen("cmd.exe", shell=True)

# 在命令行中键入命令并按回车
subprocess.Popen("echo Hello world!", shell=True)

# 发送输入并获取输出
input_text = "This is my input"
output, error = subprocess.Popen("echo " + input_text, shell=True, stdout=subprocess.PIPE).communicate()
print(output.decode())  # 打印输出</code>

Note:

• You can use the & or && symbols in the command to execute multiple commands serially or in parallel.
• You can use other methods of the Popen object to control command input, output, and error handling.

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