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

Raising exceptions

Unfortunately Twitter can change the maximum amount of characters allowed at any time.

The only thing we know is that

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,
)

message = input("What would you like to tweet?  ")
try:
    tweet(message)
    if len(message) > tweet(message):
        raise MessageError("Oh no! Your message was too long (...)")   
    tweet(message)
except CommunicationError as err:
    print("An error occurred attempting to connect to Twitter. Please try again!{}".format(err))

1 Answer

Kamaren McCord
Kamaren McCord
11,033 Points

I'm not to familiar with the twitter library but it looks like you are not using the dry principle in your try block as you call tweet(message) twice. try calling it only after you do the length check and then also, you are comparing the len of message to the tweet. You have ''' if len(message) > tweet(message): ''' try this ''' if len(message) > len(tweet(message)): #error checking statements tweet(message) ''' in other words only tweet the message after you have error checked.