如何在多个哈希中按字母顺序对数组进行分组

def group_array_by_alphabet(arr):
    # 步骤1：按字母顺序排序数组
    sorted_arr = sorted(arr)

    # 步骤2：创建空的哈希表
    groups = {}

    # 步骤3-4：按字母顺序将元素分组
    for element in sorted_arr:
        first_letter = element[0].lower()  # 忽略大小写
        if first_letter not in groups:
            groups[first_letter] = [element]
        else:
            groups[first_letter].append(element)

    # 步骤5：对每个分组按字母顺序排序
    for group in groups.values():
        group.sort()

    return groups

# 示例用法
array = ['Apple', 'Banana', 'Cat', 'Dog', 'Elephant', 'Fish', 'Giraffe']
result = group_array_by_alphabet(array)
print(result)

{
    'a': ['Apple'],
    'b': ['Banana'],
    'c': ['Cat'],
    'd': ['Dog'],
    'e': ['Elephant'],
    'f': ['Fish'],
    'g': ['Giraffe']
}