Python Practice Creating and Using Functions in Python Practice Functions Use an External Function

Thomas Suerth
Thomas Suerth
1,438 Points

What is wrong with my code?

it is about the challenge in task 3 of 3

using_a_function.py
"""
This is importing a function named `tweet` from a file
    that we unfortunately don't have access to change.

You use it like so:
>>> tweet("Hello this is my tweet")

If the function cannot connect to Twitter,
    the function will raise a `CommunicationError`
If the message is too long,
    the function will raise a `MessageTooLongError`
"""
from twitter import (
    tweet,
    MessageTooLongError,
    CommunicationError,
)

try:
    message = input("What would you like to tweet?  ")
    tweet(message)
except CommunicationError:
    print("An error occurred attempting to connect to Twitter. Please try again!")
except MessageTooLongError:
    print("Oh no! Your message was too long (...)")

2 Answers

Thomas Suerth
Thomas Suerth
1,438 Points

Thank you for your help...appreciate it

you are welcome :)

Hi Thomas,

"""
This is importing a function named `tweet` from a file
    that we unfortunately don't have access to change.

You use it like so:
>>> tweet("Hello this is my tweet")

If the function cannot connect to Twitter,
    the function will raise a `CommunicationError`
If the message is too long,
    the function will raise a `MessageTooLongError`
"""
from twitter import (
    tweet,
    MessageTooLongError,
    CommunicationError,
)

message = input("What would you like to tweet?  ")
# Your code here

try:
    tweet(message)
except CommunicationError:
    print("An error occurred attempting to connect to Twitter. Please try again!")
except MessageTooLongError as err:
    print(f"Oh no! Your message was too long ({err})")

First of all, you can leave user input outside of try block because we are trying to catch possible errors from tweet() function only ( at lease, that's what the challenge is asking us to do here ).

In MessageTooLongError exception, we can get a reference to it. And we can do this with a new keyword that's called as, so you say except MessageTooLongError as error, we'll just call it err. It's a new variable that will be created, and it will be assigned the exception that was thrown. So now, we can just print that out.

Please, refer back to this video for more information about raising exceptions: https://teamtreehouse.com/library/expecting-exceptions and https://teamtreehouse.com/library/raising-exceptions