Python初學——字典遍歷

# 字典的遍歷
dict1 = {'Alice': '2341', 'Lucy': '9102', 'Ziky': '3258'}

print(dict1.keys())
print(dict1.value())
print(dict1.items())

 

 

# 按鍵遍歷
for i in dict1.keys():
    print(i)

 

# 按值遍歷
for value in dict1.values():
    print(value)

 

#鍵值對輸出
for key,value in dict1.items():
    print(key,value)

 

# 字典包含列表
info = {'name':'xiaoming','course': ['數據結構', '計算機網絡', '計算機組成原理', '操作系統']}
print(info['course'][3])#先找到key，才能對應value,value是列表，可用下標訪問

for i in info['course']:#循環訪問字典中的列表
    print (i)

 

#字典包含字典
info = {'info2017':{'name':'xiaoming','age':'22'}}
print (info['info2017']['age'])

for key,value in info.items():
    for v in value.items():
        print (v)