pathon字典遍历的方法举例

有两种实现字典遍历的方法，下面举例说明

方法1.

dic1 = {'Europe':{'man':'Guido','woman':'girl'},
       'Asia':{'man':'Gongzhen','woman':'Xudan'} }
# for i in dic1:
#     print(i,dic1[i])
for i in dic1.items():
    print(i)

方法2.

dic1 = {'Europe':{'man':'Guido','woman':'girl'},
       'Asia':{'man':'Gongzhen','woman':'Xudan'} }
for i in dic1:
    print(i,dic1[i])
# for i in dic1.items():
#     print(i)

两种方法得到的结果相同，如下：

 

3. 还可以用两个变量分别存键和值

dic1 = {'Europe':{'man':'Guido','woman':'girl'},
       'Asia':{'man':'Gongzhen','woman':'Xudan'} }
# for i in dic1:
#     print(i,dic1[i])
# for i in dic1.items():
#     print(i)
for i,v in dic1.items():
    print(i,v)

结果如下：