python dict()

# 创建一个空字典
empty_dict = dict()
print(empty_dict)  # 输出: {}

# 使用键值对创建字典
fruit_colors = dict(apple='red', banana='yellow')
print(fruit_colors)  # 输出: {'apple': 'red', 'banana': 'yellow'}

# 从元组列表创建字典
tuple_list = [('apple', 'red'), ('banana', 'yellow')]
fruit_colors_from_tuples = dict(tuple_list)
print(fruit_colors_from_tuples)  # 输出: {'apple': 'red', 'banana': 'yellow'}

# 从关键字参数创建字典
fruit_colors_from_kwargs = dict(apple='red', banana='yellow')
print(fruit_colors_from_kwargs)  # 输出: {'apple': 'red', 'banana': 'yellow'}

# 从另一个字典创建字典
another_dict = {'apple': 'green', 'banana': 'yellow'}
new_dict = dict(another_dict)
print(new_dict)  # 输出: {'apple': 'green', 'banana': 'yellow'}