小编Hri*_*kar的帖子

我想使用 pandas 中的 fillna 命令来估算数据帧。这是我的代码片段：

import glob
import pandas as pd
files=glob.glob("IN.201*.csv")
i=0
n=1    
#the while loops are for reading and writing different subsets of the table into 
#different .txt files:
while i<15:
   j=0
   while j<7:
    dfs=[]
    m=1
   #for loop over only one file for testing:
       for file in files[:1]:
        z=i+1
        #reading subset of the dataframe:
        k=float(68.109375)+float(1.953125)*i
        k1=float(68.109375)+float(1.953125)*z
        l=float(8.0)+float(4)*j
        l1=float(8.0)+float(4)*(j+1)
        df=pd.read_csv(path+file).query( '@k <= lon < @k1 and @l < lat <= @l1')[['lon','lat','country','avg']]
        #renaming columns in df: 
        df.rename(columns={"avg":"Day"+str(m)}, inplace=True)
        #print(df)
        m=m+1 …