AttributeError: 'NoneType' object has no attribute 'head'

Question

import pandas as pd    
from alpha_vantage.timeseries import TimeSeries
from alpha_vantage.techindicators import TechIndicators 
ts = TimeSeries(key=api_key, output_format = 'pandas')
ti = TechIndicators(key=api_key, output_format='pandas')
data1, meta_data1 = ts.get_intraday(symbol = 'GOOGL' ,interval = '5min', outputsize = 'full')
data2, meta_data2 = ti.get_bbands(symbol = 'GOOGL' , interval='5min', time_period=60)
data = pd.concat([data1, data2], axis=1, sort=False)
data = data.rename(columns={'1. open': 'Open', '2. high': 'High', '3. low': 'Low', '4. close': 'Close'}, inplace = True)
data.head()

在上面的代码中，我从 alpha vantage api 导入数据。但是出现了上面的错误。请帮助我！

Answer 1

当您使用 inplace=True 时，rename 函数就地执行操作，而不是 return 具有重命名列的数据框。相反，它 returns None，然后被分配给 data - 使其成为 NoneType 对象。由于 data 不再是 df，调用 head() 会导致您遇到错误。