__getitem__

class History:
    def __init__(self, file_path:str, max_count:int=10):
        self.file_path = file_path
        self.max_count = max_count
        self.data = []
        
    def __getitem__(self, target):
            if isinstance(target, int) and target <= self.max_count:
                return self.data[target]
          
# 此时可以通过 xxxx[int] 的方式获取到属性
if ( __name__ == "__main__"):
    tar = '.histroy'
    histroy = History(tar)
    histroy.add('ccvb')
    histroy.add('1')
    
    print(histroy[0]) # 1