How to exit only an 'if' block in Python and not the entire program
Question:
Here I want to exit the if block, but I don’t want to use sys.exit() as it will terminate the program. I have a few lines to be executed at the end, hence I want to exit the if block only.
I can’t use break as it flags an error "break outside loop".
In this I want the program to exit the block at "if (retry == 3)", line 55 and print the lines at the end. However, it’s not happening until it is using sys.exit(), where it’s completely exiting the program.
import random
import sys
loop = ''
retry = 0
loop = input('Do you want to play lottery? yes/no: ')
if loop != 'yes':
print('Thank you!! Visit again.')
sys.exit()
fireball = input('Do you want to play fireball? yes/no: ')
lotto_numbers = sorted(random.sample(range(0, 4), 3))
fireball_number = random.randint(0, 3)
while loop == 'yes':
user_input1 = int(input('Please enter the first number: '))
user_input2 = int(input('Please enter the second number: '))
user_input3 = int(input('Please enter the third number: '))
print('Your numbers are: ', user_input1, user_input2, user_input3)
def check():
if lotto_numbers != [user_input1, user_input2, user_input3]:
return False
else:
return True
def fbcheck():
if lotto_numbers == [user_input1, user_input2, fireball_number]:
return True
elif lotto_numbers == [fireball_number, user_input2, user_input3]:
return True
elif lotto_numbers == [user_input1, fireball_number, user_input3]:
return True
else:
return False
retry += 1
result = check()
if (result == True):
print("Congratulations!! You won!!")
else:
print("Oops!! You lost.")
if (fireball == 'yes'):
fb_result = fbcheck()
if (fb_result == True):
print("Congratulations, you won a fireball!!")
else:
print("Sorry, you lost the fireball.")
print('No of retries remaining: ', (3 - retry))
if (retry == 3):
sys.exit()
loop = input('Do you want to try again? yes/no: ')
continue
else:
pass
print("Winning combination: ", lotto_numbers)
if (fireball == 'yes'):
print('fireball no: ', fireball_number)
print('Thank you!! Visit again.')
Answers:
You don’t need anything at all. Code inside the if
block will execute and the script will run code after the if
block.
if
is not a loop, so it doesn’t repeat. To proceed to further code, just remember to stop the indent; that’s all.
I.e.:
if some_condition:
# Do stuff
# Stop indent and do some more stuff
I think I gotcha your willing.
You want to execute something after the if condition is executed? So, create a subtask, and call it!
def finish_program():
print("something")
a = "foo"
print("finish program")
loop = input('Do u want to play lottery ? yes/no : ')
if loop!='yes':
print('Thank you!! visit again.')
finish_program()
Here I want to exit the if block, but I don’t want to use sys.exit() as it will terminate the program. I have a few lines to be executed at the end, hence I want to exit the if block only.
I can’t use break as it flags an error "break outside loop".
In this I want the program to exit the block at "if (retry == 3)", line 55 and print the lines at the end. However, it’s not happening until it is using sys.exit(), where it’s completely exiting the program.
import random
import sys
loop = ''
retry = 0
loop = input('Do you want to play lottery? yes/no: ')
if loop != 'yes':
print('Thank you!! Visit again.')
sys.exit()
fireball = input('Do you want to play fireball? yes/no: ')
lotto_numbers = sorted(random.sample(range(0, 4), 3))
fireball_number = random.randint(0, 3)
while loop == 'yes':
user_input1 = int(input('Please enter the first number: '))
user_input2 = int(input('Please enter the second number: '))
user_input3 = int(input('Please enter the third number: '))
print('Your numbers are: ', user_input1, user_input2, user_input3)
def check():
if lotto_numbers != [user_input1, user_input2, user_input3]:
return False
else:
return True
def fbcheck():
if lotto_numbers == [user_input1, user_input2, fireball_number]:
return True
elif lotto_numbers == [fireball_number, user_input2, user_input3]:
return True
elif lotto_numbers == [user_input1, fireball_number, user_input3]:
return True
else:
return False
retry += 1
result = check()
if (result == True):
print("Congratulations!! You won!!")
else:
print("Oops!! You lost.")
if (fireball == 'yes'):
fb_result = fbcheck()
if (fb_result == True):
print("Congratulations, you won a fireball!!")
else:
print("Sorry, you lost the fireball.")
print('No of retries remaining: ', (3 - retry))
if (retry == 3):
sys.exit()
loop = input('Do you want to try again? yes/no: ')
continue
else:
pass
print("Winning combination: ", lotto_numbers)
if (fireball == 'yes'):
print('fireball no: ', fireball_number)
print('Thank you!! Visit again.')
You don’t need anything at all. Code inside the if
block will execute and the script will run code after the if
block.
if
is not a loop, so it doesn’t repeat. To proceed to further code, just remember to stop the indent; that’s all.
I.e.:
if some_condition:
# Do stuff
# Stop indent and do some more stuff
I think I gotcha your willing.
You want to execute something after the if condition is executed? So, create a subtask, and call it!
def finish_program():
print("something")
a = "foo"
print("finish program")
loop = input('Do u want to play lottery ? yes/no : ')
if loop!='yes':
print('Thank you!! visit again.')
finish_program()