s =[1,2,3,4,5,6,7,8]
for i in s:print(i+1)
res = [ i+1 for i in s]
res = [str(i) for i in s]print(res)

# def mysql (**mysql_info):
#     print(mysql_info)
# def request(url,method,**kwargs):                   # 两个星号 把关键字的参数都放到这个字典里
#      print(url)

def is_float(s):print(s)s=str(s)if s.count('.')==1:left,right = s.split('.')if left.isdigit() and right.isdigit():print('正小数')return Trueelif left.startswith('-') and left.count('-')==1 and \left[1:].isdigit() and right.isdigit():print('负')return Trueprint('不合法')return False

# #定义的全局变量是 list、字典、集合， 可以不用声明global，就可以用
# #如果是字符串、元组、float、
# name='小明'
# stus = []
# def a():
#     global name  #改全局变量的话，要修改的话改外面的name,尽量少用
#     name='hhh'
#     stus.append('a,b,c')
#     # print(name)
# def b():
#     print(name)
#     print('b的值',stus)
#     age = 18
#     print(name)
# a()
# b()

# num = [1,1,2,3,4,5,6,7,8,9]
# num2= [1,1,2,3,4,5,6,7,8,9]
# num2 = num  #浅拷贝，两个变量指向的同一块内存地址
# num2 = copy.deepcopy(num)  #深拷贝，新开辟一个内存，两块不同的内存

import json
#解析json的# json_str = '''
# {"name":"xiaohei","age":18,"sex":"男","age":18}
# '''
# res = json.loads(json_str) #把字符串(json串)转成字典
# print(res)
# print(type(json_str))
# print(type(res))

dic = {"xiaohei":{"age":18,"password":12345,"sex":"男","addr":"北京"},"马春波":{"age":18,"password":12345,"sex":"男","addr":"北京"},"王东泽":{"age":18,"password":12345,"sex":"男","addr":"北京"}# res = json.dumps(dic,ensure_ascii=False,indent=4)#把字典变成字符串
# print(res)
# f = open('user.json','w',encoding='utf-8')
# f.write(res)#load 自己读
# f = open('user.json',encoding='utf-8')
# res = json.loads(f.read())
# print(res)
# res = json.load(f)
# print(res)#dump 自己写的
fw = open('newuser.json','w')
json.dump(dic,fw,indent=4,ensure_ascii=False)

import os
res = os.listdir('/Users/nhy/Desktop') #列出某个目录下的所有文件
# os.remove()
# os.rename()
# os.mkdir(r'test/niuhy/haha')#创建文件夹
# os.makedirs(r'test1/lyl/aaa')#会创建父目录
# res = os.path.exists(r'/Users/nhy/Desktop/stu.txt')
# os.path.isfile() #判断是否为文件
# os.path.isdir()#判断是否为文件
# res = os.path.split(r'/Users/nhy/Desktop/stu.txt')
# res = os.path.dirname(r'/Users/nhy/Desktop/stu.txt')#取父目录
# res = os.getcwd() #获取当前的目录
# os.chdir(r'/Users/nhy/Desktop/')#更改当前目录
# res = os.getcwd()
# print(res)
# open('a.txt','w')
# print(os.environ)#看你电脑的环境变量
#
# res = os.path.join('test','hhh','abc','a.txt')#拼接路径
# print(res)
# res= os.path.abspath('..')#根据相对路径取绝对路径
# print(res)