Search for a value in a nested dictionary python

Here’s a simple recursive version:

def getpath(nested_dict, value, prepath=()):
    for k, v in nested_dict.items():
        path = prepath + (k,)
        if v == value: # found value
            return path
        elif hasattr(v, 'items'): # v is a dict
            p = getpath(v, value, path) # recursive call
            if p is not None:
                return p

Example:

print(getpath(dictionary, 'image/svg+xml'))
# -> ('dict1', 'part2', '.svg')

To yield multiple paths (Python 3 only solution):

def find_paths(nested_dict, value, prepath=()):
    for k, v in nested_dict.items():
        path = prepath + (k,)
        if v == value: # found value
            yield path
        elif hasattr(v, 'items'): # v is a dict
            yield from find_paths(v, value, path) 

print(*find_paths(dictionary, 'image/svg+xml'))