panda.DataFrame 分析库存数据出错

Question

I was coding a Stock Analyzer program following this guide: https://towardsdatascience.com/in-12-minutes-stocks-analysis-with-pandas-and-scikit-learn-a8d8a7b50ee7

I got stuck on the part of the code which said

dfreg = df.loc[:,['Adj Close','Volume']]
dfreg['HL_PCT'] = (df['High'] - df['Low']) / df['Close'] * 100.0
dfreg['PCT_change'] = (df['Close'] - df['Open']) / df['Open'] * 100.0

First, it gave this error:

NameError: name 'df' is not defined

I changed it to pandas.DataFrame and it gave me this error:

TypeError: 'property' object is not subscriptable

I don't know how to fix this. Please help.

Answer 1

Did you do?:

import pandas as pd
import datetime
import pandas_datareader.data as web
from pandas import Series, DataFrame


start = datetime.datetime(2010, 1, 1)
end = datetime.datetime(2017, 1, 11)

df = web.DataReader("AAPL", 'yahoo', start, end)
df.tail()

If df.tail() don`t show you the dataframe clean your workspace and try again because it show like you haven't load corectly the dataFrame --> df