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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 _encode_dict(self, obj):
 """Returns a JSON representation of a Python dict"""


        self._increment_nested_level()

        buffer = []
        for key in obj:
            buffer.append(self._encode_key(key) + ':' + self._encode(obj[key]))

        self._decrement_nested_level()

        return '{'+ ','.join(buffer) + '}'