孙兆坤

# print('wo gan jue jin tian tian qi hen re')
# print('我觉得''今天''很开心')
# print('''天天'就'是睡觉''')
# print("你过'''的'''好吗")
# abc123_=100
# __abc=500
# name=67
# Name=899
# NAME=9000
# name=input('ni zhi dao ma')
# name=int (input('wo bu zhi dao:'))
# print(type(name))
#
# print(name+6)
#
# name=['xiaowang','xiuaohong']
# print(name)
#运算
# s=20
# z=6
# print(s+z)
# print(z-s)
# print(s*z)
# print(s/z)
# print(s%z)
# print(s**z)
# print(s//z)

#赋值运算
o=8
p=3

# o //=p
# print(o)
# o **=p
# print(o)
# o -=p
# print(o)
# o +=p
# print(o)

#python比较运算值
# a=8
# b=5
# c=8
# print(a>b)
# print(a<b)
# print(a == b)
# print(a==c)
# print(a!=b)
# print(a>=c)
# print(b<=c)

# python中的逻辑运算符
# a = 2
# b = 1
# c = 2
# print(a>b and a!=c)
# print(a>b and a==c)
# print(a>b or a!=c)
# print(not a>b)

# python中的成员运算符
# xiaoming = ['男的','女的',666,999]
#
# print(999 in xiaoming)
#
# print('男的' not in xiaoming)
#
# print('666' not in xiaoming)
#
# print(not 666 in xiaoming)




# 1TB = 1024GB
# 1GB = 1024MB
# 1MB = 1024KB
# 1KB = 1024byte
# 1byte = 8bit       #计算机的最小单位,bit
# 0 0 0 0 0 0 0 0
# # 128,64,32,16,8,4,2,1
# a=11     #00001011
# b=17     #00010001
# print(a&b)  #00000001  与
# print(a|b)  #00011011   或
# print(a^b)  #00011010   异或
# 按位取反公式-(x+1)
#print(~a)
#print(~-17)

# print(b<<2)      #01000100
# print(b>>2)      #000000100
#
#
# # python中的索引   index
# # 索引分为正向索引(从0开始,从左到右)
# # 和负向索引(从-1开始,从右往左)
#
# str='szkzytlbhsxc'
# print(str[5])
#
# print(str[-2])
#
# str1='asdfghjklas'
# print(str1[1:6:1])
# print(str1[-2:-8:-2])
# print(str1[:2:-1])
# print(str1[-1::-2])


str1 ='qwertyuiop'
str2 ='where,hert'

print(str1.capitalize())
print(str2.capitalize())

print(str1.title())
print(str2.title())


str3='aassshhhjkkdyyasi'

print(str3.count('s'))


str4='asgjsdjnh'
print(' '.join(str4))


str5 ='s*g*k*g*p'
print(str5.split('g'))

print(str5.split('g')[2])



str6 ='qazwsxedcraq'

print(str6.strip('aq'))

print(str6.lstrip('aq'))

print(str6.rstrip('aq'))