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'