python - 类型错误 : Type Tuple cannot be instantiated; use tuple() instead

Question

我用以下代码编写了一个程序:

import pandas as pd
import numpy as np
from typing import Tuple

def split_data(self, df: pd.DataFrame, split_quantile: float) -> Tuple(pd.DataFrame, pd.DataFrame):
    '''Split data sets into two parts - train and test data sets.'''
    df = df.sort_values(by='datein').reset_index(drop=True)
    quantile = int(np.quantile(df.index, split_quantile))
    return (
        df[df.index <= quantile].reset_index(drop=True),
        df[df.index > quantile].reset_index(drop=True)
    )

程序返回以下错误: TypeError: Type Tuple cannot be instantiated; use tuple() instead .我明白，我可以通过替换 Tuple(pd.DataFrame, pd.DataFrame) 来解决我的代码与 tuple() ，但是我丢失了信息的一部分，即我的元组将由两个 Pandas 数据框组成。

请您帮帮我，如何解决错误并同时不丢失信息？

Answer 1

使用方括号:

Tuple[pd.DataFrame, pd.DataFrame]

来自 docs :

Tuple type; Tuple[X, Y] is the type of a tuple of two items with the first item of type X and the second of type Y. The type of the empty tuple can be written as Tuple[()].