[Solved]-How do I change the value of submitted form data using form object and redisplay it?

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If the data is coming from a request (which is the case if you are using a view) the form.data dictionary will be a QueryDict which is supposed to be immutable. Thankfully you can hack your way into changing it by copying it first:

self.data = self.data.copy()
self.data['phone_number'] = 1234567890

If you are changing directly a form instance that is not from a view’s request, you can change the form.data dictionary (it’s a simple dictionary object this way) directly like so:

# Don't need to copy `data` first
self.data['phone_numer'] = 123456789
👤Bernhard Vallant

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