用前一天的值填充数组中缺少的日期

import datetime

def fill_missing_dates(array):
    # Find the minimum and maximum dates in the array
    min_date = min(array.keys())
    max_date = max(array.keys())

    # Create a new dictionary to store the filled values
    filled_array = {}

    # Iterate over the date range
    current_date = min_date
    while current_date <= max_date:
        # Check if the current date is in the original array
        if current_date in array:
            # Add the value to the filled array
            filled_array[current_date] = array[current_date]
        else:
            # Use the previous day's value to fill the missing date
            previous_date = current_date - datetime.timedelta(days=1)
            filled_array[current_date] = filled_array[previous_date]

        # Move to the next date
        current_date += datetime.timedelta(days=1)

    return filled_array