python如何在字典中插入或增加一个字典

字典名 = {
        '键1(key1)'：'值1(value1)',

        '键2(key2)'：'值2(value2)',
        ......
}

dict_2 = {'name': 'Lihua', 'age': 19}
dict_3 = {'name': '小红', 'age': 18}
dict_1 = {}
 
dict_1['key_1'] = dict_2
dict_1['key_2'] = dict_3
 
print(dict_1)
# 输出
#{
#    'key_1': {'name': 'Lihua', 'age': 19}, 
#   'key_2': {'name': '小红', 'age': 18}
#}

info_list = [{'name': 'Lihua', 'age': 19},
             {'name': '小红', 'age': 18}]
dict_1 = {}
 
for i in range(2):
    dict_1[i] = info_list[i]
 
print(dict_1)
# 输出
#{
#    0: {'name': 'Lihua', 'age': 19}, 
#    1: {'name': '小红', 'age': 18}
#}

dict_2 = {'name': 'Lihua', 'age': 19}
dict_3 = {'name': '小红', 'age': 18}
dict_4 = {'habit': 'sport', 'high': 178}
dict_1 = {}
 
dict_1.update(dict_2)
print(dict_1)
# 输出 {'name': 'Lihua', 'age': 19}
 
dict_2.update(dict_3) # 因为两个字典键相同，所以dict_2内容被覆盖
print(dict_2)
# 输出  {'name': '小红', 'age': 18}
 
dict_3.update(dict_4)
print(dict_3)
# 输出  {'name': '小红', 'age': 18, 'habit': 'sport', 'high': 178}