尝试使用熊猫数据框将数据写入特定列

Question

`

import pandas as pd
import numpy as np
import csv

header = ["Blues", "Jazz", "Rock", "Country", "Pop", "Rap", "Metal", "Classical"]

with open("music.csv", "w") as SectorCSV:
    csvwriter = csv.writer(SectorCSV, lineterminator = "\n")
    print("Creating Sector.csv")
    csvwriter.writerow(header)

df = ["Beethoven", "Mozart", "Adele", "Beyonce", "Nirvana", "Eminem", "Metallica", "Bach"]
df = pd.DataFrame(df)
df.to_csv("Sector.csv", index=False, columns=header, mode="a")

`

例如，我想将贝多芬附加到经典列中，但我不知道如何将数据附加到特定列。

1 个错误示例：KeyError: "None of [Index(['Blues', 'Jazz', 'Rock', 'Country', 'Pop', 'Rap', 'Metal', 'Classical'], dtype='object')] are in the [columns]"

Answer 1

我是这就是你的例外

df = pd.DataFrame()
df['columnname'] = ["Beethoven", "Mozart", "Adele", "Beyonce", "Nirvana", "Eminem", "Metallica", "Bach"]
df.to_csv("Sector.csv", index=False, columns=header, mode="a")