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Start your free trial###### Nick Gaudio

**Python Web Development**Techdegree Student 2,133 Points

# Error Handling on reverse number game

So I decided to take ol' Ken Love's advice and write the reverse version of the number game where I know the number and the computer is guessing. I also wrote this originally before watching the video on how Ken did it. I'm sure it might not be as pretty but it works! Below is my code:

# Import Random module/library

import random

def game():

```
#Guesses for the computer
guesses_left = 5
#Set the range for the computer to guess
lower_bound = 1
upper_bound = 10
while guesses_left:
ran_num = random.randint(lower_bound,upper_bound)
#Make the computer Guess
print("The computer's guess is {}.".format(ran_num))
my_response = input("Is this the correct number? (y) or is it 'Higher' or 'Lower'?")
if my_response.lower() == "higher":
guesses_left -= 1
print("You have {} guesses left, computer.".format(guesses_left))
lower_bound = ran_num + 1
print("")
elif my_response.lower() == "lower":
guesses_left -= 1
print("You have {} guesses left, computer.".format(guesses_left))
upper_bound = ran_num - 1
print("")
elif my_response.lower() == "y":
print("That's the correct number!")
break
else:
print("Man over Machine.")
```

game()

Everything works just fine. I just want to know how I can error handle for when I decide to be a jerk to the computer and set the upper bound (through my responses of higher and lower) below the lower bound on the random.randint() function.

e.g. lower_bound = 5 upper_bound = 4 random.randint(lower_bound, upper_bound) 5 4 This throws an error since 4 is lower than 5.

This obviously wouldn't happen if I play the game fairly and don't change my number but I'm just curious.

## 2 Answers

###### Oszkár Fehér

Treehouse Project ReviewerHi Nick Interesting idea.One approach would be a method which handles this. The second something like this:

```
if lower_bound > upper_bound:
ran_num = random.randint(upper_bound, lower_bound)
else:
ran_num = random.randint(upper_bound, lower_bound)
```

The method would be something similar:

```
def generator():
if lower_bound > upper_bound:
return random.randint(upper_bound, lower_bound)
else:
return random.randint(upper_bound, lower_bound)
```

and when you call:

```
ran_num = generator()
```

But this is just my idea. Keep up the good work!

###### Oszkár Fehér

Treehouse Project ReviewerHi Nick I apologize because i did a mistake but is fixable

```
def generator():
if lower_bound > upper_bound:
return random.randint(upper_bound, lower_bound)
else:
return random.randint(lower_bound, upper_bound)
```

and also with the if statement i forgot to change the order of the variables but i think you got the idea. Happy coding