def truncate_data(data, max_records):

"""Truncates a list of records to a maximum number of records."""

if not isinstance(data, list):

print("Error: Input data must be a list.")

return []

if not isinstance(max_records, int) or max_records <= 0:

print("Error: max_records must be a positive integer.")

return []

truncated_data = data[:max_records]

print(f"Truncated data to {max_records} records.")

return truncated_data

if __name__ == '__main__':

# Example usage

my_data = list(range(100))

max_records = 10

truncated_data = truncate_data(my_data, max_records)

print(f"Truncated data: {truncated_data}")

#Example with invalid input

invalid_data = "not a list"

truncated_data = truncate_data(invalid_data, 5)

invalid_max_records = [1,2,3]

truncated_data = truncate_data(my_data, invalid_max_records)