python作业

# print('hello world')
# print("hello 'big' world")
#
# a1 = input('请输入一个数字')
# print(a1)
# print(type(a1))
#
# a2 = int(input('请输入一个内容：'))
# print(a2)
# print(type(a2))
#
# # if else
# a3 = input('请输入一个数字：')
# a4 = input('请输入一个数字：')
# if a3>a4 :
#     print(a3)
# else:
#     print(a4)
#
# #算术运算符
# x = 1
# y = 3
# print(x+y)
# print(x*y)
# print(x/y)
# print(x%y)
# print(x**y)
# print(x//y)

# 赋值运算符
# a = 7
# b = 3
# a = a+b
# a += b
# a -= b
# a *= b
# a /= b
# a **=b
# a //= b
# a %= b
# print(a)

# 比较运算符
# a = 3
# b = 2
# c = 5
# print(a>b)
# print(a==b)
# print(a<c)
# print(a!=c)

# 逻辑运算符
# a = 4
# b = 3
# c = 2
# print(a>b and b>c)
# print(a>c or c>b)
# print(b>c or a!=c)
# print(not a<b)

# 成员运算符
# list1 = ['xiaoming','xiaozhang','xiaoli',7000,8000,7500]
# print('xiaoming' in list1)
# print('xiaoli' not in list1)
# print(8000 in list1)
# print(not 7500 in list1)

# 位运算符
# a = 8
# b = 9
# print(a&b)      #与
# print(a|b)      #或
# print(a^b)      #异或
# print(~a)       #取反
# print(a>>b)     #a往右移动2位
# print(a<<b)     #a往左移动2位

# 索引
# str1 = 'qwertyuiop'
# print(str1[1:2:1])
# print(str1[1:3])
# print(str1[:2])
# print(str1[-1:-4:-1])
# print(str1[2::1])
# print(str1[:1:-1])
# print(str1[::])
# print(str1[::-2])

# capitalize()函数    title()
# str1 = 'zxcvb'
# str2 = 'good_boy'
# print(str1.capitalize())
# print(str1.title())
# print(str2.capitalize())
# print(str2.title())
# count()函数
# str1 = 'qwerqwerqqwre'
# print(str1.count('q'))

# join()函数
# str1 = 'qwertyuiop'
# print('-' .join(str1))

# # split()函数
# str1 = 'q-w-e-r-t-y-u-i-o-p'
# print(str1.split('-'))
# print(str1.split('y')[1])

# strip()  lstrip()   rstrip()
# str1 = 'qwertyuiopq'
# print(str1.strip('qw'))
# print(str1.lstrip('qw'))
# print(str1.rstrip('qw'))