A twist on the previous Recursively Modify Python Dictionary, this function will modify a Python dictionary to convert snake_case keys to PascalCase keys.

def snake_to_PascalCase(d):
    for k, v in d.copy().items():
        if isinstance(v, dict):
            d.pop(k)
            d[k.title().replace("_", "")] = v
            snake_to_PascalCase(v)
        elif isinstance(v, list):
            d.pop(k)
            d[k.title().replace("_", "")] = v
            for i in v:
                v.remove(i)
                v.append(snake_to_PascalCase(i))
        else:
            d.pop(k)
            d[k.title().replace("_", "")] = v
    return d

• Gist: snake_to_PascalCase.py