Updating values in nested dictionary

[imas]

I'm looking for a way to update a nested dict dict1
dic1 = {'key1': {'key2': {'key3': {'key4': {'key51': {'key511': 'val511', 'key512': 'val512'}}, 'key52': {'key521': {'key5211': 'val5211', 'key5212': 'val5212'}}}}}}

I want to replace the element in dic1: {'key51': {'key511': 'val511', 'key512': 'val512'}} to 'val4'

So I can get a new dictionary as the following:
dic2 = {'key1': {'key2': {'key3': {'key4': 'val4', 'key52': {'key521': {'key5211': 'val5211', 'key5212': 'val5212'}}}}}}

I can do this manually using the following statement

>>> dic1['key1']['key2']['key3']['key4'] = 'val4'

>>> dic1
{'key1': {'key2': {'key3': {'key52': {'key521': {'key5211': 'val5211', 'key5212': 'val5212'}}, 'key4': 'val4'}}}}

but I got stuck in writing Python code for this problem

Your help would be very much appreciated. Thank you.

[bvdet]

The way you updated the dictionary manually would be the way to do it. What about writing code for it is a problem? Are you trying to copy the dictionary and change a value?

[dwblas]

When a dictionary is nested more than one or two levels deep, you should consider using SQLite instead http://www.wdvl.com/Authoring/python...s07162009.html