使用python和pandas读取Yahoo数据时出现错误

Question

我正在使用Python和Pandas。

我下面有以下代码正在读取亚马逊股票的信息：

import gspread
from oauth2client.service_account import ServiceAccountCredentials
import pprint
import datetime as dt
import matplotlib.pyplot as plt
from matplotlib import style
from scipy.signal import argrelextrema
from pandas_datareader import data as pdr
import fix_yahoo_finance as yf
import pandas as pd


def sample_reading_from_yahoo():
    # setting plotting, start  / end date and time
    style.use('ggplot')

    # setting up the date and time
    start = dt.datetime(2017, 1, 1)
    end = dt.date.today()

    # pull back the data
    yf.pdr_override()
    #data = pdr.get_data_yahoo("AMZN", start, end="2017-09-12")

    data = pdr.get_data_yahoo("AMZN", start, end)

    data = data.rename(columns={'Open': 'open'})
    data = data.rename(columns={'High': 'high'})
    data = data.rename(columns={'Low': 'low'})
    data = data.rename(columns={'Close': 'close'})
    data = data.rename(columns={'Adj Close': 'adjusted'})
    data = data.rename(columns={'Volume': 'vol'})

    data = data.drop_duplicates(keep=False)

    data = data[['open', 'high', 'low', 'close', 'vol']]
    return data


# MAIN
data = sample_reading_from_yahoo()
print(data)

输出如下所示：

                   open         high          low        close       vol
Date                                                                    
2017-01-03   757.919983   758.760010   747.700012   753.669983   3521100
2017-01-04   758.390015   759.679993   754.200012   757.179993   2510500
2017-01-05   761.549988   782.400024   760.260010   780.450012   5830100
2017-01-06   782.359985   799.440002   778.479980   795.989990   5986200
2017-01-09   798.000000   801.770020   791.770020   796.919983   3440100
2017-01-10   796.599976   798.000000   789.539978   795.900024   2558400

每当我对MAIN区域进行如下更改时，

# MAIN

data = sample_reading_from_yahoo()
print(data)

data.Date = pd.to_datetime(data.Date, format='%d.%m.%Y %H:%M:%S.%f')

data.set_index(data.Date)

我收到以下错误

追溯（最近一次通话最近）：文件“ C：/Users/dgmufasa/PycharmProjects/Opportunities/Opportunities.py”，行96，数据= sample_reading_from_yahoo（）文件“ C：/ Users / dgmufasa / PycharmProjects / Opportunities / Opportunities。 py”，第86行，在sample_reading_from_yahoo data.Date = pd.to_datetime（data.Date，format ='％d。％m。％Y％H：％M：％S.％f'）文件“ C：\\ WORK getattr返回对象中的\\ Software \\ Python64bitv3.6 \\ lib \\ site-packages \\ pandas \\ core \\ generic.py“行3614。 getattribute （自身，名称）AttributeError：'DataFrame'对象没有属性'Date'

我怎样才能解决这个问题？

修改方式

@CK Chen-感谢您的回复。

我进行了以下更改：

def sample_reading_from_yahoo():
    [... snip ...]

    #print(data['vol'])

    data = data.drop_duplicates(keep=False)

    data = data[['open', 'high', 'low', 'close', 'vol']]
    return data

# MAIN

data = sample_reading_from_yahoo()

#print(data.index)

data['datetime_index'] = pd.to_datetime(data.index, format='%m-%d-%Y %H:%M:%S')
data.set_index('datetime_index')

print('THIS THE DATA RESULT')
print(data)

并得到结果：

THIS THE DATA RESULT
                   open         high          low        close       vol  \
Date                                                                       
2017-01-03   757.919983   758.760010   747.700012   753.669983   3521100   
2017-01-04   758.390015   759.679993   754.200012   757.179993   2510500   
2017-01-05   761.549988   782.400024   760.260010   780.450012   5830100    

           datetime_index  
Date                       
2017-01-03     2017-01-03  
2017-01-04     2017-01-04  
2017-01-05     2017-01-05  

时间格式似乎没有变化。 我做错了什么？

TIA

Answer 1

“日期”是数据框的index.name。
你可以试试：

data['datetime_index'] = pd.to_datetime(data.index, format='%Y-%m-%d')
data.set_index('datetime_index')