Python----Python字典类型数据通过点‘.’的方式访问

（1）对于类似如下结构类型的数据，在一定的场合下，希望类似于info.student, info.student.name, info.teacher.course.math 等递归地通过点（.）的方式调用字典的数据

info={
"student":{
"name":"zhangsan",
"age":20,
"male":"man"
},
"teacher":{
"name":"Mr Wang",
"age":25,
"male":"woman",
"course":{
"math":"Friday",
"english":"Monday"
}
}
}

（2）可通过自定义如下类，然后将上述字典类型的数据转换一下即可
本质是递归的将字典类型的数据转换为Dotdict类型的（即实现了__getattr__的类）

class DotDict(dict):
def __init__(self, *args, **kwargs):
super(DotDict, self).__init__(*args, **kwargs)

def __getattr__(self, key):
value = self[key]
if isinstance(value, dict):
value = DotDict(value)
return

（3）完整代码如下：

class DotDict(dict):
def __init__(self, *args, **kwargs):
super(DotDict, self).__init__(*args, **kwargs)

def __getattr__(self, key):
value = self[key]
if isinstance(value, dict):
value = DotDict(value)
return value

info={
"student":{
"name":"zhangsan",
"age":20,
"male":"man"
},
"teacher":{
"name":"Mr Wang",
"age":25,
"male":"woman",
"course":{
"math":"Friday",
"english":"Monday"
}
}
}

dot_info=DotDict(info)
print(dot_info.student)
print(dot_info.student.name)
print(dot_info.teacher.name)
print(dot_info.teacher.course.math)

执行结果如下：

{'name': 'zhangsan', 'age': 20, 'male': 'man'}