Question

我有一些字符串日期我尝试计算从今天到字符串日有多少天示例字符串日期

examples=["June 30 - July 16","Thursday, July 15","July 9 - 19"]

我只写一种类型

import datetime
arriveTimes="June 30 - July 16"
dates=arriveTimes.split(" - ")
monthToNumber = {
'January' : 1,         
'February' : 2,         
'March' : 3,           
'April' : 4,              
'May' : 5, 
'June' : 6,
'July' : 7, 
'August' : 8, 
'September' : 9, 
'October' : 10, 
'November' : 11, 
'December' : 12}
firstMounth=""
arriveTimesOnDayList=[]
for date in dates:
    
    month,day=date.split(" ")
    
    
    month=str([v for k, v in monthToNumber.items() if month.lower() in k.lower()][0])
    today = datetime.datetime.now()
    year=str(today.year)
    dateTimeObj = datetime.datetime.strptime(year+"-"+month+"-"+day, '%Y-%m-%d')
    arriveTimeDatetimeObj = dateTimeObj - today
    arriveTimesOnDayList.append(str(arriveTimeDatetimeObj.days))
print(arriveTimesOnDayList)
arriveTimesOnDayStr=arriveTimesOnDayList[0]+"-"+arriveTimesOnDayList[1]
print(arriveTimesOnDayStr)

但我希望它支持所有类型

Answer 1

datetime 没有解析任意日期字符串的功能，您可能需要找到一些这样做的库。

datetime.strptime() 需要固定格式，因此您需要将所有日期字符串保持为相同格式，或者您可能需要列出您想要的所有格式，然后一一尝试。

from datetime import datetime
def get_date(date):
    # %B for month full name, %A for weekday full name
    formats = ["%B %d", "%A, %B %d", "%d"]
    today = datetime.now()
    for f in formats:
        try:
            dt = datetime.strptime(f"{today.year} {date}", f"%Y {f}")
            # if the date is before today, treated as date in next month
            if dt < today:
                dt = dt.replace(month=today.month+1)
            return dt
        except ValueError:
            continue
    else:
        print("Date format not supported.")

def day_from_today(dates):
    for date in dates:
        dt = get_date(date)
        if dt:
            dft = (dt - datetime.now()).days
            print(f"{dft} {'days' if dft > 1 else 'day'} to {dt.date()}")

example = ["June 30", "July 16", "Thursday, July 15", "June 28", "19", "7 19"]
day_from_today(example)

结果：

2 days to 2021-06-30
18 days to 2021-07-16
17 days to 2021-07-15
0 day to 2021-06-28
21 days to 2021-07-19
Date format not supported.

python日期str解析

1 个答案: