------------------------------------------------------

product=[‘a’,’b’,’c’,’d’]

for index,item in enumerate(product):

print(index,item)

>>>

0 a

1 b

2 c

3 d

------------------------------------------------------

if a.isdigit():#判断是否为数字（1或‘1’）

\033[31:1m%s\033[0m    #%s加颜色31

l  字符串操作：name=”My \t name is chen”
print(name.capitalize())#大写
print(name.count(“a”))

print(name.center(50,”_”))

print(name.endswith(“en”))#是否为指定字符结尾

print(name.expandtabs(tabsize=30))#tab 空格个数

print(name.find(“”))

print(name.format(name=’chen’,year=26))#格式化输出 name=”My name is {name} and i am {year} old”

print(name.format_map(_{‘name’:’chen’,’year’”26}))#格式化输出字典格式 name=”My name is {name} and i am {year} old”

print(name.islnum())#是否为A-Z,a-z,0-9

print(name.alphabet())#是否为A-Z,a-z

print(name.isdecimal())#是否为十进制

print(name.isdigit())#是否为整数

print(name.isidentifier())#判断是不是一个合法的标识符（变量名）

print(name.islower())#是否为小写

print(name.istitle())#是否首字母大写 “My Name Is”,是否为标题样式

print(name.isupper())#是否为大写

join:

s = ';'

li = ['apple', 'pear', 'orange']

fruit = s.join(li)

print fruit

>>> apple;pear;orange

print(name.ljust(50,’*”))#保证name长度为50，不够用*补全(右边)

print(name,rjust(50,’*’)) #保证name长度为50，不够用*补全(左边)

print(name.lower())#变小写

print(name.upper())#变大写

print(name.lstrip())#在左边去掉空格或回车

maketrans()

p=str.maketrans(“abcdef”,”123456”)

print(“chen”.translate(p))

>>>3h4n#把字符串转换为后面的值

print(‘chen’.replace(‘e’,’E’,1))>>>chEn

print(‘chen’.rfind(‘e’))#找到最右边的值的下标

split()

print(‘chen q1ang’.split(‘ ’))>>>[‘chen’,’q1ang’]

print(‘chen\n q1ang’.splitlines())#等于split(‘\n’) 按换行符分解

print(‘Chen’.swapcase())>>>cHEN

print(‘chen’.zfill(50))>>>00000000000000chen#十六进制时补位