<｜begin▁of▁sentence｜>### Instruction:
As a risk analyst, you have received a dataset containing multiple entries of the form ('key1', 'value1'), ('key2', 'value2'), ('key1', 'value3'). Your task is to determine the number of unique keys present in the dataset using a specific method provided by the MultiDict API. This will allow you to assess the potential impact of duplicate keys on the overall dataset risk.
### Response:
from multidict import MultiDict

# Initialize MultiDict with some values
md = MultiDict([('key1', 'value1'), ('key2', 'value2'), ('key1', 'value3')])

# Use the __len__ method to get the number of distinct keys
distinct_keys_count = len(md)

# Print the number of distinct keys
print(f'Distinct keys count: {distinct_keys_count}')
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