非常实用的Python小技巧总结

这篇文章主要介绍了Python常用小技巧,实例总结了Python关于字典、字符串、随机数等操作技巧,非常简单实用,需要的朋友可以参考下

import uuid
mac = uuid.uuid1().hex[-12:]
print(mac) 

a = ['b','c','d']
del a[0]
print(a)#  

输出 ['c', 'd']

a = ['b','c','d']
del a[0:2] # 删除从第1个元素开始，到第2个元素
print(a)#  

输出 ['d']

a = ['b','c','d']
del a
print(a) # 此时a未定义 

a = ['c','d']
a.reverse()
a = ['d','c']
b = ','.join(a)
print(b) #  

输出 d,c

import random
x = random.randint(1,100)
y = random.choice( 'abcd')
print(x)
print(y) 

a=[1,2,3]
b=['a','b','c']
c=dict(zip(a,b))
print(c) #  

输出： {1:'a',2:'b',3:'c'}

a='1-2-3-4'
b=map(int,a.split('-'))
print(b) #  

输出： [1,2,3,4]

a = str.decode( 'utf-8' )
b = str.encode( 'utf-8' )
str.isdigit() # 是否数值
str1 = 'abc%s'%str2 

import string
x= string.ascii_lowercase
# print(x) #  

输出： abcdefghijklmnopqrstuvwxyz d = enumerate( x ) c = list( d ) print(c)

输出：

[(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd'), (4, 'e'), (5, 'f'), (6, 'g'), (7, 'h'), (8, 'i'), (9, 'j'), (10, 'k'), (11, 'l'), (12, 'm'), (13, 'n'), (14, 'o'), (15, 'p'), (16, 'q'), (17, 'r'), (18, 's'), (19, 't'), (20, 'u'), (21, 'v'), (22, 'w'), (23, 'x'), (24, 'y'), (25, 'z')]

for i ,j in d:

此时：
i = 0,1,2,.....,25
j = 'a','b'......,'z'

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