day1 python基础

print('hallo world!')
#
name = 'tank'
print(name)
# type
str1 = 'hallo'
print(type(str1))
# value
str2 = 'hallo'
print(str1 == str2)
# 让用户输入用户名
name = input('请输入名字：')
# 输出用户名
print(name)
#
print(type(name))
#双引号
str2 = "遇见米老鼠"
print(str2)
print(type(str2))
#三引号
str3 = '''
anhui
hefei
hefei xueyuan

'''
print(str3)
print(type(str3))
#
str2 = "遇见米老鼠"
print(str2)
print(type(str2))
# 三引号
str3 = '''
anhui
hefei
hefei xueyuan

'''
print(str3)
print(type(str3))
# 1.按索引取值（正向取+反向取）：只能取
# 正向取
str1 = 'hallo tank!'
print(str1[0])
print(str1[9])
# 反向取
print(str1[-2])
# 切片
print(str1[0:5])
# 歩长
print(str1[0:11])
print(str1[0:11:2])
# 长度
print(len(str1))
# 成员运算in和not in
print('h' in str1)
print('h' not in str1)
#
str1=' hello tank!'
print(str1)
str1=' hello tank! '
print(str1)
print(str1.strip())
#去除
str2='!tank!'
print(str2.strip('!'))
#切分
str1 ='hello tank!'
print(str1.split(' '))
#循环
for line in str1:
    print(line)

#大小写转换
str1='hello WuYueFeng'
print(str1.lower())
print(str1.upper())
#手欸判断
str1='hello WuYueFeng'
print(str1.startswith('hello'))
print(str1.endswith('WuYueFeng'))
#join
print(' '.join(['tabk','18','from GZ']))
print('_'.join(['tabk','18','from GZ']))
#替换replace
str1='my name is WangWei,my age is 19'
print(str1)
str2=str1.replace('WangWei','nb')
print(str2)
#判断数字
choice=input('SHUZI :')
print(choice.isdigit())
#作业
name ="aleX"
#1
print(name)
print(name.strip())
#2
print(name.startswith('al'))
#3
print(name.endswith('X'))
#4
name='aleX'
print(name)
str2=name.replace('l','p')
print(str2)
#5
print(name.split('l'))
#6
name='aleX '
print(name.upper())
#7
print(name.lower())
#8
print(name[1])
#9
print(name[0:3])
#10
print(name[2:4])

　　

转载于:https://www.cnblogs.com/tlszjz/p/11080427.html