模块 string 常用序列字符

自从知道string模块后再也不用abcd了

>>> string.digits                         #数字

'0123456789'

>>> string.ascii_letters                  #大小写

'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'

>>> string.ascii_lowercase                #小写

'abcdefghijklmnopqrstuvwxyz'

>>> string.ascii_uppercase                #大写

'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

>>> string.punctuation                    #标点符号

'!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'

>>> string.ascii_lowercase+string.digits  #相加

'abcdefghijklmnopqrstuvwxyz0123456789'

>>> s=string.ascii_lowercase+string.digits

>>> s

'abcdefghijklmnopqrstuvwxyz0123456789'

>>> c=random.sample(s,5)                  #random.sample()  随机数

>>> c

['1', '7', 't', 'd', '3']

>>> ''.join(c)

'17td3'

                                          #随机数

>>> ''.join(random.sample(string.ascii_lowercase+string.digits+string.punctuation,6))

',8kn&h'