Adding to dictionary

[ameliabob]

I see many examples o dictionary used but I cannot find any that adds to an existing dictionary

	a = dict()
	a['fgh']=123
	a['ghi'] = 345
	

Yields the error

    a['ghi']=345
TypeError: 'str' object does not support item assignment

Is it only possible to build it once and not add to it??

[Ingolme]

That code should run without error, as you can see in the documentation: https://docs.python.org/3/tutorial/datastructures.html#dictionaries

Is that all of the code? There might be something you're not showing that is interfering.