In python, is it possible to fetch variable value, where the variable name is passed as a function argument

Question

I am trying to fetch a variable value by passing the variable name into a calling function. My intention is to get the variable value based on the variable name passed as parameter.

class myConfigConstants():
    Name = "XYZ"
    Address = "abcd"
    Age = 10

    def __init__(self):
        self.value = ""

    def fetch_myConfigConstants(self, strVariableName: str):
        self.value = myConfigConstants.strVariableName
        print(self.value)
        return self.value

mc = myConfigConstants()
mc.fetch_myConfigConstants('Name')

Expected output: XYZ

This results in error: AttributeError: type object 'myConfigConstants' has no attribute 'strVariableName'

I understand that it is looking for the exact attribute, but how to make passed parameter name resolves into actual attribute at runtime.

score 0 · Accepted Answer · answered May 18 '22 at 05:53

0

You can use getattr function.

getattr(self, strVariableName)

In your code,

...
def fetch_myConfigConstants(self, strVariableName: str):
    self.value = getattr(self, strVariableName)
    print(self.value)
    return self.value

Hope it could help.

answered May 18 '22 at 05:53

David Lu

2,160
1
5
14

score 0 · Answer 2 · answered May 18 '22 at 05:57

0

You can use getattr for this.

self.value = getattr(myConfigConstants, strVariableName)

answered May 18 '22 at 05:57

Rinkesh P

454
2
11

In python, is it possible to fetch variable value, where the variable name is passed as a function argument

2 Answers2