Dictionary won't update the value from a variable that was updated outside of the dictionary

Question

I have a dictionary that contains variables that are text. I want the dictionary to have the updated values of all the variables.However, when I update the variable, the dictionary still holds the old value.

For instance:

firstValue = "First Value Key"
secondValue = "Second Value Key"
thirdValue = "Third Value Key"

Dictionary = {"0":firstValue,
              "1":secondValue,
              "2":thirdValue}

print(Dictionary["0"])

firstValue = "New Value"

print(Dictionary["0"])

The output is the following:

First Value Key
First Value Key

But I want the output to look like this:

First Value Key
New Value

What am I missing?

The dictionary contains a reference to the _value_, not the _name_. Recommended reading: https://nedbatchelder.com/text/names.html — jonrsharpe, Oct 31 '21 at 17:06

score -1 · Answer 1 · answered Oct 31 '21 at 17:06

-1

You're only changing the variable that you already passed into the dictionary, update the value directly to it:

Dictionary['0'] = "New Value"

answered Oct 31 '21 at 17:06

Pedro Maia

2,666
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You should use the variable value instead – Cardstdani Oct 31 '21 at 17:11

score -1 · Answer 2 · edited Nov 01 '21 at 09:58

-1

You need to assign the value of the variable to the dictionary value:

firstValue = "First Value Key"
secondValue = "Second Value Key"
thirdValue = "Third Value Key"

Dictionary = {"0":firstValue,
              "1":secondValue,
              "2":thirdValue}

print(Dictionary["0"])

firstValue = "New Value"
Dictionary["0"] = firstValue
print(Dictionary["0"])

edited Nov 01 '21 at 09:58

E_net4

27,810
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answered Oct 31 '21 at 17:08

Cardstdani

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Dictionary won't update the value from a variable that was updated outside of the dictionary

2 Answers2