import os

print(os.name)

结果：
nt

import os

print(os.getcwd())

结果：
D:\python_workshop\python6\study

import os

dirs = os.listdir(r"D:\python_workshop\python6")
print(dirs)

for file in dirs:
    print(file)


结果：
[‘.idea‘, ‘alice.txt‘, ‘homeworks‘, ‘lessons‘, ‘personal_practices‘, ‘study‘, ‘url.txt‘]
.idea
alice.txt
homeworks
lessons
personal_practices
study
url.txt

import os

path = "./test"
os.mkdir(path, 0o755)

print("目录已创建")


结果：
目录已创建

import os

path = "./test/android_app/auto_test"
os.makedirs(path, 0o755)

print("递归目录已创建")


结果：
递归目录已创建

import os

path = "../"
print("移除前的目录文件为:", os.listdir(path))

os.remove("../math.txt")
print("移除后的目录文件为: ", os.listdir(path))


结果：
移除前的目录文件为: [‘.idea‘, ‘alice.txt‘, ‘homeworks‘, ‘lessons‘, ‘math.txt‘, ‘personal_practices‘, ‘study‘, ‘url.txt‘]
移除后的目录文件为:  [‘.idea‘, ‘alice.txt‘, ‘homeworks‘, ‘lessons‘, ‘personal_practices‘, ‘study‘, ‘url.txt‘]

import os

path = "../"
print("删除前的目录文件为: ", os.listdir(path))

os.rmdir("../test")
print("删除后的目录文件为: ", os.listdir(path))


结果：
删除前的目录文件为:  [‘.idea‘, ‘alice.txt‘, ‘homeworks‘, ‘lessons‘, ‘personal_practices‘, ‘study‘, ‘test‘, ‘url.txt‘]
删除后的目录文件为:  [‘.idea‘, ‘alice.txt‘, ‘homeworks‘, ‘lessons‘, ‘personal_practices‘, ‘study‘, ‘url.txt‘]

import os

print(os.environ.get("path"))


结果：
C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Intel\OpenCL SDK\3.0\bin\x86;C:\Program Files (x86)\Intel\OpenCL SDK\3.0\bin\x64;D:\Program\python34;D:\Program\python34\Scripts;D:\Program\python34\Lib;D:\Program\python34\PyInstaller-3.3.1;D:\Program\python34\lib\site-packages\pywin32_system32

import os

os.system(‘echo "hello world!"‘)


结果：
"hello world!"

import os

path = "D:\\python_workshop"
name = "hello_world"                  #可以是不存在的目录或文件名

print(os.path.join(path, name))


结果：
D:\python_workshop\hello_world

import os

path = "./url.txt"
print(os.path.isfile(path))

path = "../python6"
print(os.path.isdir(path))


结果：
False
False

import os

path = "../test"
print(os.path.exists(path))


结果：
True

import os

path = r"D:\python_workshop"
print(os.path.split(path))


结果：
(‘D:\\‘, ‘python_workshop‘)

import os

path = r"D:\python_workshop\python6\lesson1.py"
print(os.path.splitext(path))


结果：
(‘D:\\python_workshop\\python6\\lesson1‘, ‘.py‘)

import os

path = r"D:\python_workshop\python6"
print(os.path.dirname(path))


结果：
D:\python_workshop

import os

path = r"D:\python_workshop\python6"
print(os.path.basename(path))


结果：
python6

import os

name = r"D:\python_workshop\1.txt"
print(os.path.getsize(name))

name = r"D:\python_workshop"
print(os.path.getsize(name))


结果：
197
4096