python dictionary key exist

python dictionary key exist

Python 字典(Dictionary) has_key()方法 描述 Python 字典(Dictionary) has_key() 函数用于判断键是否存在于字典中,如果键在字典dict里返回true,否则返回false。 语法 has_key()方法语法: dict.has_key(key) 参数 key -- 要在字典中查找的键。 返回值 如果键在 ...

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