我尝试使用熊猫合并两个数据框,但这是我得到的错误代码:
ValueError:您正在尝试合并datetime64 [ns]和datetime64 [ns,UTC]列。如果您希望继续,则应使用pd.concat
我尝试了在线找到其他解决方案,但是没有任何效果!!该代码已提供给我,似乎可以在其他PC上使用,但不能在我的计算机上使用。
这是我的代码:
import sys
import os
from datetime import datetime
import numpy as np
import pandas as pd
# --------------------------------------------------------------------
# -- price, consumption and production --
# --------------------------------------------------------------------
fn = '../data/np_data.csv'
if os.path.isfile(fn):
df_data = pd.read_csv(fn,header=[0],parse_dates=[0])
else:
sys.exit('Could not open data file {}̈́'.format(fn))
# --------------------------------------------------------------------
# -- temp. data --
# --------------------------------------------------------------------
fn = '../data/temp.csv'
if os.path.isfile(fn):
dtemp = pd.read_csv(fn,header=[0],parse_dates=[0])
else:
sys.exit('Could not open data file {}̈́'.format(fn))
# --------------------------------------------------------------------
# -- price data --
# -- first date: 2014-01-13 --
# -- last date: 2020-02-01 --
# --------------------------------------------------------------------
fn = '../data/eprice.csv'
if os.path.isfile(fn):
eprice = pd.read_csv(fn,header=[0])
else:
sys.exit('Could not open data file {}̈́'.format(fn))
# --------------------------------------------------------------------
# -- combine dataframes (and save as CSV file) --
# --------------------------------------------------------------------
#
df= df_data.merge(dtemp, on='time',how='left') ## This is where I get the error.
print(df.info())
print(eprice.info())
#
# add eprice
df = df.merge(eprice, on='date', how='left')
#
# eprice available only available on trading days
# fills in missing values, last observation is used
df = df.fillna(method='ffill')
#
# keep only the relevant time period
df = df[df.date > '2014-01-23']
df = df[df.date < '2020-02-01']
df.to_csv('../data/my_data.csv',index=False)
已导入的数据集看起来很正常,具有预期的列数和观察值。我在Panda中使用的版本是1.0.3
尝试在加入之前在两个时间列上都执行df['Time'] = pd.to_datetime(df['Time'], utc = True)
(或者更确切地说,没有UTC的时间需要经历!)