python小练0001
Posted Liez
tags:
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第 0001 题:做为 Apple Store App 独立开发者,你要搞限时促销,为你的应用生成激活码(或者优惠券),使用 Python 如何生成 200 个激活码(或者优惠券)?
# coding = utf-8 __author__= ‘liez‘ import random def make_number(num, length): str = ‘abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789‘ a = [] i = 0 while i < num: numstr = ‘‘ for j in range(length): numstr += random.choice(str) if numstr not in a: #如果没重复 a.append(numstr) i += 1 print(numstr) make_number(20,10)
note:
random.
choice
(seq): Return a random element from the non-empty sequence seq. If seq is empty,
这里先生成了20个:
COsSx9umWf
QKMSbDVj0G
ARdycodYAf
f8h0drSHJl
e0T6lF6aO1
ZB06xAlSnf
SmcAqxYHqm
209me2lsCl
NnvmMeMgqd
FqxLZVlzpC
dj7luHI53s
RytNv7yhTH
bg7PDFmGE1
I7r7S1mpWK
agN2PYF3TI
523YX6TdS8
GmffcmyoYX
MmZZ2pHieO
gaHTmOVPDT
6rgb3v2TJP
ps:
1.我是用random module的,也看到其他人很多不同的做法。比如用的uuid module,uuid-Universally unique identifier(通用唯一识别码)。
暂时不清楚这些序列生成函数间有什么区别(是不是哪个更安全之类的?)。uuid module docs
2.我用list来放生成的序列号,也看见用set的: A set object is an unordered collection of distinct hashable objects. Common uses include membership testing, removing duplicates from a sequence, and computing mathematical operations such as intersection, union, difference, and symmetric difference. 功能更多嘛。set types docs
具体改动:
def make_number(num, length): str = ‘abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789‘ a = set() //... i = 0 while i < num: numstr = ‘‘ for j in range(length): numstr += random.choice(str) if numstr not in a: a |= {numstr} //... i += 1 print(numstr)
练习簿:https://github.com/Yixiaohan/show-me-the-code
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