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Question

我在代码的前一部分中定义了日期和月份。我需要这个程序在一天不到7点的时候运行。我要求提供过去7天的支出情况。

问题：例如，如果输入的日期是4，则4-4(天(是第0天(不存在(，4-5是第1天，4-6是第2天，4-7是第3天。我需要它是第4-4=31或30或28或29天(已经定义(，4-5=30，4-6=29天。

我知道这篇文章结构不好，我很抱歉，英语不是我的第一语言。如果不这样理解，我会尽量说清楚。

listOfSpendings = []
x = 0
while x < 7:
if day - x <=0:
month = month - 1
dayDiff= ###SOMETHING I DUNNOOOO
day = monthlenght - dayDiff
print ("How many liters did you spend on the day", day - x, "of", month)
spendings = input()
while True:
try:
spendings = int(spendings)
if spendings < 0:
spendings = input ("Insert a value =! 0")
else:
break
except ValueError:
spendings = input("Incorrect value, correct")
x = x+1
listOfSpendings.append(spendings)
sumSpendings = sum (listOfSpendings)

Answer 1

您的代码也会遇到月份为负数的情况。使用建议的日期时间库，您可以执行以下操作：

from datetime import datetime, timedelta
list_of_spendings = []
# Month number
for day in [(datetime.now()-timedelta(x)) for x in range(7)]:
print('How many liters did you spend on the day {} of {}'.format(day.day, day.month))
#Rest of your code

或

# Month name
for day in [(datetime.now()-timedelta(x)) for x in range(7)]:
print('How many liters did you spend on the day {} of {}'.format(day.day, day.strftime('%B')))
#Rest of your code

或

# Short month name
for day in [(datetime.now()-timedelta(x)) for x in range(7)]:
print('How many liters did you spend on the day {} of {}'.format(day.day, day.strftime('%b')))
#Rest of your code

Answer 2

我就是这么想的。"Dia"one_answers"mes"是先前定义的。

翻译：

listaGastos = listOfSpendings
gastos = spendings
dia = day
mes = month
DuracMes = monthlenght
diaC = currentDay
mesC = currentMonth

代码：

DuracMes = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
listaGastos = []
x = 0
diaC = dia
mesC = mes
while x < 7:
dia = diaC - x
if dia <= 0:
mes = mesC - 1
diaDif = diaC - 1
dia = DuracMes [mes - 1] + dia
print("Quantos litros de soro fisiologico foram gastos no dia", dia, "de", mes)
gastos = input()
while True:
try:
gastos = int (gastos)
if gastos < 0:
gastos = input ("Introduza um valor diferente de 0: ")
else:
break
except ValueError:
gastos = input ("Nao inseriu um valor adequado, quantos litros de soro fisiologico foram gastos nos ultimos sete dias? ")
x += 1
listaGastos.append(gastos)
sumGastos = sum (listaGastos)