在Python的元组列表中查找重复的值

def find_duplicates(tuple_list):
    values = [value for sublist in tuple_list for value in sublist]
    unique_values = set(values)
    
    if len(tuple_list) != len(unique_values):
        duplicates = [value for value in unique_values if values.count(value) > 1]
        return duplicates
    else:
        return "No duplicates found"

# 示例元组列表
tuple_list = [(1, 2, 3), (4, 5, 6), (7, 8, 9), (1, 2, 3)]

duplicates = find_duplicates(tuple_list)
print(duplicates)

[1, 2, 3]