python持久化存储文件操作方法

f = open('C:/Users/Shinelon/PyCharmProjects/PythonProject1/python/westos',mode='a+')
f.write('\nxinxiedeo')

with open('/root/PycharmProjects/pythonProject1/4/test.txt','w+') as f:
    f.write('hello world\n')
    f.seek(0,0)   #移动指针位置到文件最开始
    print("当前指针位置为：",f.tell())
    print(f.read())   #读取文件内容

with open('/root/PycharmProjects/pythonProject1/4/test.txt','w+') as f:
    f.write('hello world\n')
    f.seek(0,2)  #移动指针位置到文件末尾
    print("当前指针位置为：",f.tell())
    print(f.read())   #读取文件内容

import os #linux操作系统
import platfORM #windows操作系统
print(os.name)
# 2.获取主机信息，windows系统使用platform模块，如果是linux系统直接使用os模块

import os
import platform
try:
	uname = os.uname()
except :
	uname = platform.uname()
finally:
	print(uname)

import os

envs  = os.environ
print(envs)

import os
print(os.path.isabs('/root/PycharmProjects/pythonProject1/4/test.txt'))
print(os.path.isabs('test.txt'))

import os
print(os.path.abspath('/root/PycharmProjects/pythonProject1/4/test.txt'))
print(os.path.abspath('test.txt'))

import os
BASE_DIR = os.path.dirname(__file__)
setting_file = os.path.join(BASE_DIR,'dev.conf')
print(setting_file)

import os
filename = 'D:/root/westos/test.txt'
print(os.path.basename(filename)) #输出文件名
print(os.path.dirname(filename)) #输出文件所在目录