# input = input('age>>:')
# input = int(input)
# if input > 18:
# print('大了')
# elif input < 18:
# print('小了')
# else:
# print('ok')
# count = 0
# while count <= 10:
# print(count)
# count += 1
# count = 0
# while count <= 10:
# print(count)
# count += 1
# count = 1
# while count <= 10:
# if count == 7:
# break
# print(count)
# count += 1
# count = 1
# while count <= 10:
# if count == 4:
# count += 1
# continue # 跳过本次循环，后面的循环都不执行
# print(count)
# count += 1
# name = input('name>>:')
# paseword = input('paseword>>:')
# if name == 'rambo' and paseword == '123':
# print('登陆成功')
# else:
# print('用户名或者密码错误')
# while True: # 全选+tab键 全部向前缩进 &&&&&&&&&&
# # tab+shift键 全部向后缩进 **********
# name = input('name>>:')
# paseword = input('paseword>>:')
# if name == 'rambo' and paseword == '123':
# print('登陆成功')
# else:
# print('用户名或者密码错误')
# count = 1
# while True:
# if count > 3:
# break # break之后的都不运行了
# name = input('name>>:')
# paseword = input('paseword>>:')
# if name == 'rambo' and paseword == '123':
# print('登陆成功')
# else:
# print('用户名或者密码错误')
# count += 1
# count = 1
# while True:
# if count > 3:
# break # break之后的都不运行了
# name = input('name>>:')
# paseword = input('paseword>>:')
# if name == 'rambo' and paseword == '123':
# print('登陆成功')
# while True:
# cmd=input('name>>:')
# if cmd == 'sean':
# break
# print('run %s' %cmd) # 执行命令！执行命令！执行命令！执行命令！执行命令！执行命令！执行命令！
# break # 结束本层循环
# else:
# print('用户名或者密码错误')
# count += 1
# count = 1
# tag = True
# while tag:
# if count > 3:
# break # break之后的都不运行了
# name = input('name>>:')
# paseword = input('paseword>>:')
# if name == 'rambo' and paseword == '123':
# print('登陆成功')
# while tag:
# cmd=input('name>>:')
# if cmd == 'sean':
# tag = False
# continue
# print('run %s' %cmd) # 执行命令！执行命令！执行命令！执行命令！执行命令！执行命令！执行命令！
# else:
# print('用户名或者密码错误')
# count += 1
# count = 0
# while count < 7:
# print(count)
# count += 1
# else:
# print('当while在运行过程中没有被break打断时，执行')
# count = 0
# while count < 7:
# if count == 4:
# break
# print(count)
# count += 1
# else: # 了解！！！！！！
# print('当while在运行过程中没有被break打断时，运行')
# 字符串里的单个字符是可以取出来的，
# msg='hello world'
# print(msg[0]) # 得到h 按照索引取值，正向取
# print(msg[-1]) # 得到d 按照索引取值，反向取
# 字符串是不可变类型，python中没有单个字符
# print(msg[0:3])# =< 0 <3 切片，顾头不顾尾 hel
# print(msg[0:7])# =< 0 <7 切片，顾头不顾尾 空格也算字符 hello w
# print(msg[0:7:2])# =< 0 <3 切片，顾头不顾尾 步长为2 hlow
# print(msg[5:0:-1])# =< 0 <3 切片，顾头不顾尾 倒着取 步长为1 olle
# print(msg[-1:0:-1])# =< 0 <3 切片，顾头不顾尾 倒着取 步长为1 dlrow olle
# print(msg[-1::-1])# =< 0 <3 切片，顾头不顾尾 倒着取 步长为1 dlrow olleh
# print(msg.__len__()) # 11 长度
# print(len(msg)) # 11 len调用 “msg.__len__() ”python内部调用的功能
# 成员运算 in not in
# print('llo' in msg) # True
# 移除空白 strip 用法.strip()
# password=' deicbricbr ' 用法.strip()
# print(password.strip()) # deicbricbr 用法.strip()
# password=input('>>:').strip() 用法.strip()
# print(password) 用法.strip()
# password='asdf 1234 ' 字符中间的空格不会去掉
# print(password) # asdf 1234 字符中间的空格不会去掉
# 切分 split
# user_info='root:123:/1:asdf'
# cmd=user_info.split(':') 命令符为：
# print(cmd) # ['root', '123', '/1', 'asdf']
# print(cmd[0]) # root
# file='salary /kook1/book/asdf'
# cmd=file.split()
# print(cmd) # ['salary', '/kook1/book/asdf']
# print(file.split()[0]) # salary
# file='c:\\a\\b\\c.txt'
# print(file.split('\\')[0]) # c:
# print(file.split('\\',1)) # ['c:', 'a\\b\\c.txt']
# print(file.rsplit('\\',1)) # ['c:\\a\\b', 'c.txt']
# msg='hello world'
# print(len(msg))
# n = 0
# size=len(msg)
# while n < size:
# print(msg[n])
# n += 1
# for i in msg:
# print(i)
