遍历key值:
a = {'a':'1','b':'2','c':'3'}
for i in a:
print(i+':'+a[i])
输出:
a:1
b:2
c:3
a = {'a':'1','b':'2','c':'3'}
for i in a.keys():
print(i+':'+a[i])
等同于上面
遍历value值:
a = {'a':'1','b':'2','c':'3'}
for value in a.values():
print(value)
输出:
1
2
3
遍历字典项:
a = {'a':'1','b':'2','c':'3'}
for key_value in a.items():
print(key_value)
输出:
('a', '1')
('b', '2')
('c', '3')
遍历键值对:
a = {'a':'1','b':'2','c':'3'}
for key,value in a.items():#等同于for (key,value) in a.items():
print(key+":"+value)
输出:
a:1
b:2
c:3