浅谈String模块ascii_letters和digits

简介: 浅谈String模块ascii_letters和digits

本文介绍string模块ascii_letters和digits方法,其中ascii_letters是生成所有字母,从a-z和A-Z,digits是生成所有数字0-9.


示例如下:

In [2]: chars = string.ascii_letters + string.digits
In [3]: print(chars)
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789

生成所有字母和数字干什么?在哪个场景中会用到呢,举个例子:比如生成激活码(优惠券),激活码一般都是字母和数字组成的,首先要有一个所有字母和数字的字符串,然后随机取出几个字母或数字。

In [3]: import random,string
In [4]: def rand_str(num, length=7):
   ...:     f = open('Activation_code.txt', 'w')
   ...:     for i in range(num):
   ...:         chars = string.ascii_letters + string.digits
   ...:         s = [random.choice(chars) for i in range(length)]
   ...:         f.write('{0}\n'.format(''.join(s)))
   ...:     f.close()
   ...:
   ...:
   ...: if __name__ == '__main__':
   ...:     rand_str(200)
   ...:

生成了一个Activation_code.txt文件,如图:

1100338-20180421160107745-1020596236.png

内容如下:

NkjmMrL
L3Z5BjZ
WSTaprg
cneoNCQ
EtYRNZX
gYY14GK
hEhhgRM
VGD35Vo
krtzuHD
SLk1D37
68TnbAv
RtceKWE
cOx7l87
71uT0o6
ClUfT5Q
O6nmQWD
M2b3sx0
NsCkFKO
r6Jh5LM
KY57KL0
LpJJweL
fHK9ONG
SAfZBkc
ycmiTla
7IRJHQR
83PhGhP
FOKgT8a
rHMoCuc
sLd1J2C
poGo6Hn
FuU5H5E
pYV3yUq
APJSxzl
QpFHULN
ao63jjZ
4tPi790
cPDTvUQ
LMUuKxp
m72rvxC
C5kvNmk
BjeFNig
8ih206i
j3RkULM
IZnYjqD
ILjmKDx
K5Z5bQm
cBxJziK
8aRpkmU
JGqw4mx
NSvBFGO
mhDGina
6umZHdj
0N2hDyu
y6TtW5k
sTuII4a
hH6CnhT
bJRUU9G
bK38x7n
7JYKNuO
HfZ1R3r
fRfvJd5
aMFP1J4
nUFytKX
CfoKevR
iKvNLiW
IvAHqNC
dteDej1
GWBvtJL
aryuT9G
BYFY8t6
S2yCvy4
ZWOYkRy
1bI7ad1
JvMAA86
Nop10tJ
XZDetXj
idbluDS
xyf9M7C
TSY2vDZ
hBVdw0Z
K7bY5Lu
vmcI2Kb
npy5GJc
sYHrBLK
mLFYPh1
AnIvBRg
TMvzxK0
ObxJ6yP
E9eiRh3
EMovni7
1P1jDAb
iPEoLuC
tfr68fo
grNJzjz
NNDitm8
Kb7tVWK
DhsueP1
5NVMzVR
Ekdmfwl
Wv2WHui
xfh2M0v
IKkcdjz
11eMT8M
3Eh2nr3
lHJKpaF
P5NEcrn
oOdGE06
wVnEsJG
aUFEbMU
Wryb97U
IPoFVDi
H2eXNZ5
Ijamrlh
1cMkOTP
kLZ5rSj
y23jl8O
5Igwd3D
t1btfKo
6xoUeaf
asOMtG1
24L4VLK
jKDeNmH
IOg572i
pPfynrL
tOkZBp1
qeNMVnt
fK6Ma2D
HI9Bc4i
5S727EW
TMi2OBP
wbrNLL3
0BxrEIH
ADkUpzd
EZDqDOP
FDLAMtv
udfzu28
CPp6Z0G
ptf8YNa
POt8jpv
4a6fpiK
oux3JiK
e8fxCw1
z1ZvufB
Be6Zl3w
WEq7m8W
W94B68P
qTVfFLC
AO9awjc
q7AfX9y
4ELYqEW
zYAuCeL
P9qmKRq
97Py6su
hcb62Nr
UGZ0mqG
3A71orU
P8Q40O8
z3Ia7Xq
WQIISLD
nwx0xcZ
8HPUXFN
eSvJKJE
jNG8pyE
vMpcPkc
v5nkHVl
RyNsxSD
Fp3SSEC
9bCbLv2
GdMZMYe
A8PDaVE
DMPvpS5
OWPZFZk
GVOAY3j
vQefxQK
JO415kp
Qtbu6rE
0kbPooo
F4Lf5Kp
mI3Kwt3
qwYybC9
TQJJwlJ
ho5k2t4
0Co0A95
wVaggxp
TbAKHCD
i4bDyx0
EUTAJ5r
LiVZv0w
yZUoGsD
2LvY0Ie
PTXxhpg
FQU9dnN
TloBN3Z
d06uXpk
NjlY24X
GQjDjUh
htcFqlI
e8m8bak
O6L0QaX
U15RVBH


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