Respuesta :
Answer:
#SECTION 1
while True:
month = input("Input the month (e.g. January, February etc.): ")
try:
if month in ('January', 'February', 'March','April', 'May', 'June','July', 'August', 'September', 'October', 'November', 'December',):
day = int(input("Input the day: "))
try:
if day > 31:
raise
elif day == 31 and month in ('September', 'April', 'June', 'November'):
raise
elif day > 29 and month == 'February':
raise
else:
break
except:
print('Invalid!!!')
print('Day not correct')
else:
raise
except:
print('Invalid!!!')
print('Enter correct Month')
#SECTION 2
if month in ('January', 'February', 'March'):
season = 'winter'
elif month in ('April', 'May', 'June'):
season = 'spring'
elif month in ('July', 'August', 'September'):
season = 'summer'
else:
season = 'autumn'
if (month == 'March') and (day > 19):
season = 'spring'
elif (month == 'June') and (day > 20):
season = 'summer'
elif (month == 'September') and (day > 21):
season = 'autumn'
elif (month == 'December') and (day > 20):
season = 'winter'
print("Season is",season)
Explanation:
#SECTION 1
This section ensures that a correct input is inserted. The try and except blocks in combination with IF statements are used to archive the result. The while loop will continue to run until a valid input is inserted.
In the first try block, It checks to see if the month inputted is a month that exists by comparing it with a list of months, if it does not exist it raises an error and executes the except block and prints invalid and states the error that occurred.
If the first TRY block executes successful, the program moves to the next, it takes an input for the number and ensures that us a valid number for each month. If the number is invalid, it raises an error and executes the try block which prints invalid and states the problem.
If al inputs are valid the program breaks out of the loop and proceeds to the next section.
#SECTION 2
In this section the data provided is used to calculate the season, by making use of IF statements and finally the season is printed.
I have attached a sample for you to see how the code runs by inputting some inaccurate values and accurate ones.
The program is an illustration of conditional statements.
Conditional statements are statements whose execution is dependent on its truth value.
The program in Python where comments are used to explain each line is as follows:
#This initializes a list of months
mnths = ["january","february","march","april","may","june","july","august","september","october","november","december"]
#This gets input for days
days = int(input("Day: "))
#This gets input for months
month = input("Month: ")
#This checks if the input month is present in the list of months.
if not(month.lower() in mnths):
#Print invalid, if not
print("Invalid")
#If yes,
else:
#This reads the month index, from the list where 0 - January...... 11 - December
month_index = mnths.index(month.lower())
#For January
if month_index == 0:
#If days is not between 1 and 31 (inclusive), then the date is invalid
if days<1 or days>31: print("Invalid")
#else, all days in January are winter
else: print("Winter")
#For February
elif month_index == 1:
#If days is not between 1 and 28 (inclusive), then the date is invalid
if days<1 or days>28: print("Invalid")
#else, all days in February are winter
else: print("Winter")
#For March
elif month_index == 2:
#If days is not between 1 and 31 (inclusive), then the date is invalid
if days<1 or days>31: print("Invalid")
#Days less than 20 are Winter
elif days<= 19: print("Winter")
#Others are spring
else: print("Spring")
#For April
elif month_index == 3:
#If days is not between 1 and 30 (inclusive), then the date is invalid
if days<1 or days>30: print("Invalid")
#else, all days in April are winter
else: print("Spring")
#For May
elif month_index == 4:
#If days is not between 1 and 31 (inclusive), then the date is invalid
if days<1 or days>31: print("Invalid")
#else, all days in May are winter
else: print("Spring")
#For June
elif month_index == 5:
#If days is not between 1 and 30 (inclusive), then the date is invalid
if days<1 or days>30: print("Invalid")
#Days less than 21 are Spring
elif days<= 20: print("Spring")
#Others are summer
else: print("Summer")
#For July
elif month_index == 6:
#If days is not between 1 and 31 (inclusive), then the date is invalid
if days<1 or days>31: print("Invalid")
#else, all days in July are summer
else: print("Summer")
#For August
elif month_index == 7:
#If days is not between 1 and 31 (inclusive), then the date is invalid
if days<1 or days>31: print("Invalid")
#else, all day in August are Summer
else: print("Summer")
#For September
elif month_index == 8:
#If days is not between 1 and 31 (inclusive), then the date is invalid
if days<1 or days>31: print("Invalid")
#Days less than 22 are Summer
elif days<= 21: print("Summer")
#Others are Autumn
else: print("Autumn")
#For October
elif month_index == 9:
#If days is not between 1 and 31 (inclusive), then the date is invalid
if days<1 or days>31: print("Invalid")
#All days in October are Autumn
else: print("Autumn")
#For November
elif month_index == 10:
#If days is not between 1 and 30 (inclusive), then the date is invalid
if days<1 or days>30: print("Invalid")
#Else, all days are Autumn
else: print("Autumn")
#For December
elif month_index == 11:
#If days is not between 1 and 31 (inclusive), then the date is invalid
if days<1 or days>31: print("Invalid")
#Days less than 21 are Autumn
elif days<21: print("Autumn")
#Others are Winter
else: print("Winter")
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