添加数据，满足所有的 时间序列，以nan值为插入函数

import numpy as np
import pandas as pd
import datetime
import re
import time
import glob
import copy

def buchong_shuju(path_in):
    time_parse = lambda date: datetime.datetime.strptime(date, '%Y-%m-%d %H:%M:%S')
    df = pd.read_csv(path_in, encoding='utf-8', parse_dates=['date'],
                 date_parser=time_parse)
    c= pd.read_csv(r'.
an值补充.csv')
    d = []
    a = np.array(c['hb'])

    helper = pd.DataFrame({'date': pd.date_range(df['date'].min(), df['date'].max(), freq='H')})
    df1 = pd.merge(df,helper,on = 'date',how='outer').sort_values('date')

    op1 = df1.groupby(df1['date'])
    for date,op2 in op1:
        # print(len(op2))

        if len(op2)==1:
            s = op2['date']

            op2 =copy.deepcopy(c)
            op2['date'] = op2['date'].apply(lambda x:s)
            # print(op2)
            # d.append(op2)
            # s =d
            # print(s)
            op2 = op2.sort_values('hb')
        d.append(op2.sort_values('hb'))
    print(d)

    return d
def save_weniian(path_in,path_out):
    with open(path_in,'r')as f:
        df = pd.DataFrame()
        df = df.append(buchong_shuju(path_in))
        # print(df)
        df.to_csv(path_out,index=False)
        print('Finished ' + path_in)
if __name__ == "__main__":
    ff = glob.glob("*_日t.csv")
    if not ff:
        print('No files to convert.')
        exit()
    else:
        print("Detected ASCII *日_.csv files: 
", "
".join(ff))
        for f in ff:
            path_in = f
            path_out = re.sub(r'(?i)t.csv', 't_1.csv', f)
            s = buchong_shuju(f)
            d = save_weniian(path_in, path_out)