單擊幾個月的月份檢查文件是否存在

Question

我試圖從2012年和11月份開始，一直到當前年份和月份，一直循環使用幾個月的列表。

start_year = "2012" 
start_month = "November" 

month = start_month 
year = start_year 

# some sort of for loop or cycle here 
    try: 
     with open('{} {}.csv'.format(month, year)): 
      CSVFile = True 
     if CSVFile: 
      print "do something cool here" 
    except IOError: 
     CSVFile = False 
    print "" 

任何意見或建設性的意見，如何實現這個或建議將不勝感激。 感謝SMNALLY

Answer 1

我可能會做如下：

import datetime, os 

current_month = datetime.date.today().replace(day=1) 
# this could be more concise if `start_month` were the month number rather than month name 
possible_month = datetime.datetime.strptime('%s %s' % (start_month, start_year), '%B %Y').date() 
while possible_month <= current_month: 
    csv_filename = possible_month.strftime('%B %Y') + '.csv' 
    if os.path.exists(csv_filename): 
     CSVFile = True 
     # do something cool here, and maybe break the loop if you like 
    possible_month = (possible_month + datetime.timedelta(days=31)).replace(day=1) 

讓我知道，如果你需要我就如何工作的展開。

Answer 2

import datetime as dt 
startYear = 2012 
startMonth = 11 
delta = 1 
curr = dt.datetime(year=startYear, month=startMonth, day=1) 

now = dt.datetime.now() 
endYear = now.year 
endMonth = now.month 

while dt.datetime(year=year+(delta/12), month=month+(delta%12),day=1) <= now: 
    try: 
     with open('{} {}.csv'.format(month, year)): 
      CSVFile = True 
     if CSVFile: 
      print "do something cool here" 
    except IOError: 
     CSVFile = False 
    print "" 
    delta += 1