反转/反转字典映射

# 原始字典
original_dict = {
    'a': 1,
    'b': 2,
    'c': 3
}

# 简单反转字典
reversed_dict = {value: key for key, value in original_dict.items()}
print(reversed_dict)  # 输出: {1: 'a', 2: 'b', 3: 'c'}

# 多值反转字典
original_dict_with_duplicates = {
    'a': 1,
    'b': 2,
    'c': 1
}

reversed_dict_with_duplicates = {}
for key, value in original_dict_with_duplicates.items():
    if value not in reversed_dict_with_duplicates:
        reversed_dict_with_duplicates[value] = [key]
    else:
        reversed_dict_with_duplicates[value].append(key)
print(reversed_dict_with_duplicates)  # 输出: {1: ['a', 'c'], 2: ['b']}

original_dict_with_duplicates = {
    'a': 1,
    'b': 2,
    'c': 1
}

reversed_dict_with_duplicates = {}
for key, value in original_dict_with_duplicates.items():
    if value not in reversed_dict_with_duplicates:
        reversed_dict_with_duplicates[value] = [key]
    else:
        reversed_dict_with_duplicates[value].append(key)
print(reversed_dict_with_duplicates)  # 输出: {1: ['a', 'c'], 2: ['b']}

def reverse_dict_generator(original_dict):
    for key, value in original_dict.items():
        yield value, key

original_dict = {
    'a': 1,
    'b': 2,
    'c': 3,
    # ... 更多数据
}

reversed_dict = dict(reverse_dict_generator(original_dict))
print(reversed_dict)  # 输出: {1: 'a', 2: 'b', 3: 'c'}