python - 通过类创建 pandas DataFrame 返回空 DataFrame

Question

此脚本的目的是生成一个数据帧，该数据帧是通过以面向对象风格编写的代码生成的。

问题是该脚本的结果是一个空数据框。

没有错误。

这是代码:

import pandas as pd


class Dataframe:
    def __init__(self):
        self.df = pd.DataFrame()

    def name(self):
        self.df['name'] = ["Hamza", "Carmen"]
        return print(self.df['name'])

    def age(self):
        self.df['age'] = [20, 15]
        return self.df['age']

    def sex(self):
        self.df['sex'] = ["Male", "Female"]
        return self.df['sex']

    def address(self):
        self.df['adress'] = ["Miami", "Seattle"]
        return self.df['adress']

    def print(self):
        return print(self.df)


x = Dataframe()
x.print()

Answer 1

您需要调用您创建的方法来填充 DataFrame。

import pandas as pd


class Dataframe:
    def __init__(self):
        self.df = pd.DataFrame()
        self.name()
        self.age()
        self.sex()
        self.address()

    def name(self):
        self.df['name'] = ["Hamza", "Carmen"]
        return print(self.df['name'])

    def age(self):
        self.df['age'] = [20, 15]
        return self.df['age']

    def sex(self):
        self.df['sex'] = ["Male", "Female"]
        return self.df['sex']

    def address(self):
        self.df['adress'] = ["Miami", "Seattle"]
        return self.df['adress']

    def print(self):
        print(self.df)


x = Dataframe()
x.print()