Python Class 方法不返回导入的 class 方法?

Python Class Method not returning imported class method?

我有一个 class 接受用户选择(如下)

from MiniProject1.interfaces.s_selection import SecondarySelection as SS  # 
imports the secondary_selection function from selections
import MiniProject1.interfaces.newcastle_cm as IT
from MiniProject1.Newcastle.newcastle_cc import ColumnCalculation as CC

class Newcastle:

    def __init__(self):
        self.key_typed = input(str("Select what you want to do: "))

    @staticmethod
    def column_or_graph():
        if SS.get_input(SS.display_input()) is True:
            IT.column_manipulation()
            return True
        IT.graph_plotting()
        return False

    def column_selection(self):
        if self.key_typed == 1:
            CC.total_electricity()  # Calls the total_electricity method
        elif self.key_typed == 2:
            pass
        elif self.key_typed == 3:
            pass
        elif self.key_typed == 4:
            pass
        elif self.key_typed == 5:
            pass

def main():
    if Newcastle.column_or_graph() is True:
        Newcastle.column_selection(Newcastle())
    elif Newcastle.column_or_graph() is False:
        Newcastle.graph_plotting(Newcastle())


if __name__ == "__main__":
    main()

第一部分似乎 运行 没有问题,因为从 class 导入的函数 SS.get_input(SS.display_input()) 工作没有任何问题并且 return 为真或假,并且当他们这样做时 Newcastle.column_selection(Newcastle()) 也能正常工作,因为它显示界面并接受用户输入。 所以,这一切似乎都奏效了。但是当用户选择 1 时,它应该 return CC.total_electricity() 方法,但它只是结束程序。 我也试过 return CC.total_electricity(),但它也做同样的事情,但不起作用。知道为什么会这样吗?我整天都在研究它。

CC.total_electricity class 方法如下所示:

import pandas as pd
class ColumnCalculation:
    """This houses the functions for all the column manipulation calculations"""

    @staticmethod
    def total_electricity():
        """Calculates the total amount of electricity used per year"""
        df = pd.read_csv("2011-onwards-city-elec-consumption.csv", thousands=',')
        df.set_index('Date', inplace=True)  # Sets index to months
        df.loc['Total'] = df.sum()  # Creates a new row for the totals of each year
        return print(df)  # Prints the dataframe

并且已经过尝试和测试可以正常工作,只是当我导入它时它没有 return 任何东西并结束了程序。

您将用户输入与一个整数进行比较:

if self.key_typed == 1:

因此,您也需要将输入转换为整数。

所以改为:

self.key_typed = input(str("Select what you want to do: "))

做:

self.key_typed = int(input("Select what you want to do: "))