在我的csv in Currency列中，我试图打印Currency = 'Swiss Franc'的索引。我的代码以某种方式打印所有索引。这是我的代码：

import pandas as pd
df = pd.read_csv('data/data.csv', sep=',')
def invalid_currency(df):
    ids_invalid_currency = df[df['Currency'] == 'Swiss Franc'].index.tolist()
    print (ids_invalid_currency)
    return ids_invalid_currency

output_1 = ids_invalid_currency(df)

我尝试了其他功能：

def invalid_currency_names(df):
    valid_names = ['USD', 'JKF', 'CAD']
    sus_name = df[~df['Currency'].isin(valid_names)]
    ids_sus_name = sus_name.index.to_list()
    print("Currency with invalid values: {}".format(ids_sus_name))
    return ids_sus_name
out_2 = invalid_currency_names(df)

它还打印csv中的每一行