Python小技巧

1.2个变量交换值

a, b = 5, 8
a, b = b, a
print(a)
print(b)

 

2.列表转字符串

list = ["one", "two"]
print(",".join(list))

 

3.获取列表中频率最高的值

from collections import Counter

list = ["one", "one", "two"]
print(Counter(list).most_common(1))

4.反转字符串/列表

a = "qepriojnfg"
print(a[::-1])

 

5.字典get默认值

d = {'a': 1, 'b': 2}
print(d.get('r', 3))

6.列表去重

a = ['b', 'c', 'd', 'b', 'c', 'a', 'a']
b = list(set(a))
print(b)