import subprocess
# 运行系统命令并获取输出
result = subprocess.run(["ls", "-l"], capture_output=True, text=True)
print(result.stdout)

import os
print(os.getcwd())

os.chdir("/path/to/your/directory")

import os
for item in os.listdir("."):
print(item)

os.mkdir("new_directory")

os.remove("file.txt")

os.rmdir("empty_directory")

import shutil
shutil.copy("source.txt", "destination.txt")

shutil.move("oldname.txt", "newname.txt")

import os.path
if os.path.exists("file.txt"):
print("File exists.")
else:
print("File not found.")

import os.path
print(os.path.getsize("file.txt"))

import os
print(os.environ.get("PATH"))

import os

os.environ["MY_VARIABLE"] = "my_value"
print(os.environ["MY_VARIABLE"])

import getpass
print(getpass.getuser())

import platform
print(platform.system())

import time
time.sleep(5) # 睡眠5秒

import datetime
print(datetime.datetime.now())

import os
os.startfile("C:\\") # Windows
# 或在Linux上
import subprocess
subprocess.run(["xdg-open", "/home"]) # Linux

import webbrowser
webbrowser.open("https://www.baidu.com")

import psutil
print("CPU Usage Per Core:")
for i, percentage in enumerate(psutil.cpu_percent(percpu=True, interval=1)):
print(f"Core {i}: {percentage}%")
print(f"Total CPU Usage: {psutil.cpu_percent()}%")