python字典去除空值

在Python中，可以使用字典推导式和内置函数来去除字典中的空值（None、空字符串和空列表等）。具体实现方法如下：

1. 字典推导式

original_dict = {"a": 1, "b": None, "c": "", "d": []}
new_dict = {k: v for k, v in original_dict.items() if v is not None and v != "" and v != []}
print(new_dict)
# 输出：{"a": 1}

2. 内置函数filter()配合lambda表达式

original_dict = {"a": 1, "b": None, "c": "", "d": []}
new_dict = dict(filter(lambda x: x is not None and x != "" and x != [], original_dict.items()))
print(new_dict)
# 输出：{"a": 1}