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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def pretty(d, indent=0):
 """A prettier way to print nested dicts """

    for key, value in d.items():
        print('  ' * indent + str(key))
        if isinstance(value, dict):
            pretty(value, indent+1)
        else:
            sys.stderr.write('  ' * (indent+1) + str(value) + '\n')