I am trying to assign variables dynamically to a class:
Example:
class P:
def __init__(self, field):
for key, value in self.func(field):
self.key = value
field = {'a' : 1, 'b' : 2}
obj = P(field)
print(obj.a)
print(obj.b)
Here I want to assign attributes dynamically to a object, basically keys of field dict as attribute. but I think it will assign 'key' as attribute to that object. How can we do this?
Use setattr to set attributes dynamically:
class P:
def __init__(self, field):
for key, value in field.items(): # <== note "items" needed here
setattr(self, key, value)
field = {'a' : 1, 'b' : 2}
obj = P(field)
print(obj.a) # 1
print(obj.b) # 2
self.func (whatever that is).
field and that self.func is what the OP thought might be necessary to extract them - in fact field.items()field itself. I now see that you've added a good answer allowing for both possible interpretations, so thanks for that.You need to use setattr, so that the value of the variable, not the name, is used as the attribute to set.
for key, value in self.func(field):
setattr(self, value, key)
Not knowing what self.func is, it's possible you just want to use the dictionary to initialize attributes, in which case you want
for key, value in field.items():
setattr(self, key, value)
or simply
self.__dict__.update(field)
self.func?