Discuss / Python / 再简单的代码也要亲手敲一遍

再简单的代码也要亲手敲一遍

Topic source

翁岚敏

#1 Created at ... [Delete] [Delete and Lock User]

问题: (1)既然元祖是可以作为key的 那么是应用在什么情况下? (2)如何添加字典的项, 还是说原来有多少key,就只能放入多少value,而不能增加key的数目?

the_dict.py

!/usr/bin/env python3

-- coding:utf-8 --

d ={ 'Michael':95, 'Bob':75, 'Tracy':85 }

print('d[\'Michael\']=',d['Michael']) print('d[\'Bob\'] =',d['Bob']) print('d[\'Tracy\']=',d['Tracy']) print('d.get(\'Thomas\',-1)=',d.get('Thomas',-1))

the_set.py

!/usr/bin/env python3

-- coding:utf-8 --

s1 =set([1,1,2,2,3,3]) print(s1) s2 =set([2,3,4]) print(s1 & s2) print(s1 | s2)


  • 1

Reply