为什么输出csv文件不显示预期结果？

Question

import glob 
from datetime import date 
import csv 
import numpy as np 
import pandas as pd 
from itertools import islice 
path = 'C:/Users/Calum/AppData/Local/Programs/Python/Python35-32/Python Programs/Brunel Forecasts/November/*.csv' 
for fname in glob.glob(path): 
    with open (fname) as f: 
     readCSV = csv.reader ((islice(f, 24, None)), delimiter = ';') 
     irrad_fore = [] 
     timestamp = [] 
     day = [] 
     month = [] 
     year = [] 
     for row in readCSV: 
      irrad1 = row[4] 
      time = row[3] 
      d = row[2] 
      m = row[1] 
      y = row[0] 

      irrad_fore.append(irrad1) 
      timestamp.append(time) 
      day.append(d) 
      month.append(m) 
      year.append(y) 

      out = csv.writer(open('C:/Users/Calum/AppData/Local/Programs/Python/Python35-32/Python Programs/Brunel Forecasts/forecast_11-2016.csv','w', newline=''), delimiter=';') 
      for values in zip(year, month, day, timestamp, irrad_fore): 
       x = values 
       out.writerow(x) 

为什么输出csv文件只包含最后几天的数据，因为当我刚刚将变量x打印到屏幕上时，它包含整个月份的数据？

Answer 1

编辑：

在我看来，那是你要实现的目标（基本串连所有文件？）是这样的：

path = 'C:/Users/Calum/AppData/Local/Programs/Python/Python35-32/Python Programs/Brunel Forecasts/November/*.csv' 

irrad_fore = [] 
timestamp = [] 
day = [] 
month = [] 
year = [] 

for fname in glob.glob(path): 
    with open (fname) as f: 
     readCSV = csv.reader ((islice(f, 24, None)), delimiter = ';') 

     for row in readCSV: 
      irrad1 = row[4] 
      time = row[3] 
      d = row[2] 
      m = row[1] 
      y = row[0] 

      irrad_fore.append(irrad1) 
      timestamp.append(time) 
      day.append(d) 
      month.append(m) 
      year.append(y) 

out = csv.writer(open('C:/Users/Calum/AppData/Local/Programs/Python/Python35-32/Python Programs/Brunel Forecasts/forecast_11-2016.csv','w', newline=''), delimiter=';') 
for values in zip(year, month, day, timestamp, irrad_fore): 
    x = values 
    out.writerow(x) 

虽然这将是可能更好写CSV文件直接没有汇总到临时列表中的所有内容：

path = 'C:/Users/Calum/AppData/Local/Programs/Python/Python35-32/Python Programs/Brunel Forecasts/November/*.csv' 
out = csv.writer(open('C:/Users/Calum/AppData/Local/Programs/Python/Python35-32/Python Programs/Brunel Forecasts/forecast_11-2016.csv','w', newline=''), delimiter=';') 

for fname in glob.glob(path): 
    with open (fname) as f: 
     readCSV = csv.reader ((islice(f, 24, None)), delimiter = ';') 

     for row in readCSV: 
      irrad1 = row[4] 
      time = row[3] 
      d = row[2] 
      m = row[1] 
      y = row[0] 

      out.writerow([y,m,d,time,irrad1])