Refer a String for Creating Class Dynamically

Question

I want to use a string as class member name. the way I thought (but it doesn't work) is in the below.

class Constant():
    def add_Constant(self, name, value): self.locals()[name] = value  # <- this doesn't work!
# class

CONST = Constant()
CONST.add_Constant(name='EULER', value=2.718)
print(CONST.EULER)

Welcome to Stack Overflow. I linked some duplicates that explain the standard tools for addressing your question in Python. But - why not [just use a dictionary](https://stackoverflow.com/questions/1373164/how-do-i-create-variable-variables)? Or an [enum with custom values](https://docs.python.org/3/library/enum.html#planet), depending on the actual *problem you are trying to solve* with the `Constant` class? — Karl Knechtel, Jan 19 '22 at 10:39

score 2 · Accepted Answer · answered Jan 19 '22 at 10:34

2

You can use setattr:

class Constant():
    def add_Constant(self, name, value):
        setattr(self, name, value) # <- this does work!

CONST = Constant()
CONST.add_Constant(name='EULER', value=2.718)
print(CONST.EULER)

This outputs:

2.718

answered Jan 19 '22 at 10:34

Tom Aarsen

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isʞuɐɥʇ ʎǝɥ hey thanks! – LIFE1UP Jan 19 '22 at 10:37

Refer a String for Creating Class Dynamically

1 Answers1