To update the value associated with a key like "name", we start by accessing it.
After accessing the value, we update it like we would any variable, by coding an equals = followed by the new value, like "Tim" here.
>>> data = {
... "name":"Zoc",
... "age":38
... }
>>> data["name"]="Tim"
>>> data
{'name': 'Tim', 'age': 38}