我想知道两天之间有多少天。下一步是找出两天之间有多少小时,但那是以后的事了。我用今天的日期创建了一个日期对象,用用户输入创建了另一个日期对象,然后用较大的日期减去较小的日期。我想这就是我错的地方,因为当两个日期都很幼稚的时候,从另一个日期中减去一个日期是没有意义的,但是从另一个日期时间中减去一个日期时间是有意义的(意识到)
我已经使用print(type(var))验证了对象的类型。两个创建的对象都是date类型,相减的结果是timedelta对象,正如预期的那样。减去date对象会给我错误的天数(大约400天),而在我的例子中应该是350天
from datetime import date, timedelta, datetime
days = list(range(1, 32))
months = list(range(1, 13))
today = date.today()
def inputInteger(message):
while True:
try:
userInput = int(input(message))
except ValueError:
print("Please enter an integer.")
continue
else:
return userInput
break
def inputMonth(message):
while True:
message = inputInteger(message)
if message in months:
return message
break
else:
print("Please pick a value from 1-12")
def inputDay(message):
while True:
message = inputInteger(message)
if int(message) in days:
return message
break
else:
print("Please pick a value from 1-31")
year = int(inputInteger('Enter a year'))
month = int(inputMonth('Enter a month (1-12)'))
day = int(inputDay('Enter a day (1-31)'))
# 2. add exception handling: leap years, leap seconds?, etc.
significantDate = date(year, month, day)
print("significant date:", significantDate, "of type", type(significantDate))
print("today:", today, "of type", type(today))
# 2. Tell me how many days are left until a certain date
if today > significantDate:
delta = today - significantDate
print("Days left:", delta.days)
else:
print("entered less than")
delta = significantDate - today
print("Days left:", delta.days)
```
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