🔒 An f string that is a sentence with an embedded item from a list. | Python | Page 1

topaz reef Jul 14, 2024, 6:18 PM

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how do I change the article "a" to "an" when needed as it precedes input that sometimes starts with a vowel and therefore changes the grammar of the sentence.

ex: motorcycles = []
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
motorcycles.append('harley')
motorcycles.append('kawasaki')
motorcycles.append('aprilia')
motorcycles.append('indian')
motorcycles.append('bmw')
motorcycles.insert(0, 'ducati')
del motorcycles [1]
popped_motorcycle = motorcycles.pop()
print(motorcycles)
print(popped_motorcycle)

last_owned = popped_motorcycle
print(f"the last motorcycle I owned was a {motorcycles.pop()}")

if the input is "aprilia" or "Indian" the "a" before {motorcycles.pop()} needs to be changed to "an"

I also would love to know a more precise way to eplain this so that Im no only learning to code but also learning to communicate as a developer.

thanks for reading!

spark loomBOT Jul 14, 2024, 6:18 PM

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topaz reef how do I change the article "a" to "an" when needed as it precedes input that so...

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@topaz reef

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undone trout Jul 14, 2024, 6:19 PM

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this is probably a bit more complex than you think

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there are cases where it will become "an" without the word beginning with a vowel

topaz reef Jul 14, 2024, 6:20 PM

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Well I think I have done it before but I forget not

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oh right that's true also.. I thought of an if clause???

undone trout Jul 14, 2024, 6:23 PM

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you mean like

f'{"an" if word[0].lower() in ["a","e","i","o","u"] else "a"}'

undone gull Jul 14, 2024, 6:23 PM

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there's a lot of edge cases to deal with here

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regex could get you close

topaz reef Jul 14, 2024, 6:24 PM

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Yay!

undone trout Jul 14, 2024, 6:25 PM

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as fashoomp said, there are a lot of cases where this won't be a correct solution

undone gull Jul 14, 2024, 6:25 PM

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!e

import re

message = 'a snake, a elephant, a apple, a computer, a umbrella'

print(re.sub('a ([aeiou]+)', r'an \1', message))

spark loomBOT Jul 14, 2024, 6:25 PM

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undone gull !e ```py import re message = 'a snake, a elephant, a apple, a computer, a umbre...

:white_check_mark: Your 3.12 eval job has completed with return code 0.

a snake, an elephant, an apple, a computer, an umbrella

topaz reef Jul 14, 2024, 6:25 PM

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yes siqius something like that.

undone trout Jul 14, 2024, 6:25 PM

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undone gull !e ```py import re message = 'a snake, a elephant, a apple, a computer, a umbre...

regex will never fail to make me confused

topaz reef Jul 14, 2024, 6:26 PM

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do both solutions work?

undone trout Jul 14, 2024, 6:27 PM

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regex solution is probably better

topaz reef Jul 14, 2024, 6:27 PM

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ok. thanks. what is regex?

undone trout Jul 14, 2024, 6:27 PM

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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_expressions

MDN Web Docs

Regular expressions - JavaScript | MDN

Regular expressions are patterns used to match character combinations in strings.
In JavaScript, regular expressions are also objects. These patterns are used with the exec() and test() methods of RegExp, and with the match(), matchAll(), replace(), replaceAll(), search(), and split() methods of String.
This chapter describes JavaScript regu...

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string manipulation

undone gull Jul 14, 2024, 6:28 PM

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topaz reef ok. thanks. what is regex?

"Regular Expressions" are a way of pattern matching specific text

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my example looks for the letter "a", followed by a space, followed by a word starting with a vowel

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actually sorry it's a bit wrong right now

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print(re.sub('a ([aeiou][a-z]+)', r'an \1', message))

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a ([aeiou][a-z]+)

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this is the pattern

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it's looking for letter a, followed by a space, followed by a vowel, followed by any number of letters

topaz reef Jul 14, 2024, 6:29 PM

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ok, thanks so much!!! how do you attach that inside the code I already wrote? I just tried it and it's not correct.

undone gull Jul 14, 2024, 6:30 PM

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store the sentence you want to print in a variable first

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then re.sub that string

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regex101.com is a great way to learn as well

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the top is the pattern, and then you can put in text to match it against

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if it gets highlighted, then it's a match

undone trout Jul 14, 2024, 6:33 PM

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topaz reef ok, thanks so much!!! how do you attach that inside the code I already wrote? I ...

this is most likely the line that isn't correct

print(f"the last motorcycle I owned was a {motorcycles.pop()}")

undone gull Jul 14, 2024, 6:35 PM

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yes, instead of printing it, store it in a variable and re.sub it afterwards

slender nova Jul 14, 2024, 6:41 PM

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an accurate a/an regex would be interesting to see, you'd have to take into account sound rules on words starting with u, irregular words like honour, acronyms... y as a vowel? the simple vowel checker is good enough though

topaz reef Jul 14, 2024, 6:43 PM

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import re
motorcycles = []
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
motorcycles.append('harley')
motorcycles.append('kawasaki')
motorcycles.append('aprilia')
motorcycles.append('indian')
motorcycles.append('bmw')
motorcycles.insert(0, 'ducati')
del motorcycles [1]
popped_motorcycle = motorcycles.pop()
print(motorcycles)
print(popped_motorcycle)

last_owned = popped_motorcycle
articles = 'a snake', 'an elephant', 'an apple', 'a computer', 'an umbrella'
print(f"the last motorcycle I owned was a {motorcycles.pop()}")
print(re.sub('a ([aeiou]+)', r'an \1', articles))

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this is what i did so far...

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py

topaz reef Jul 14, 2024, 7:21 PM

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Thanks so much @undone trout and @undone gull '''py import re
motorcycles = []
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
motorcycles.append('harley')
motorcycles.append('kawasaki')
motorcycles.append('aprilia')
motorcycles.append('indian')
motorcycles.append('bmw')
motorcycles.insert(0, 'ducati')
del motorcycles [1]
popped_motorcycle = motorcycles.pop()
print(motorcycles)
print(popped_motorcycle)

last_owned = popped_motorcycle
message = (f"the last motorcycle I owned was a {motorcycles.pop()}")
print(re.sub('a ([aeiou]+)', r'an \1', message))

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I got it now!

undone gull Jul 14, 2024, 7:26 PM

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topaz reef Thanks so much <@267702803831455751> and <@143878644169834496> '''py import re ...

You're removing 2 motorcycles. Not sure if that's what you meant to do

topaz reef Jul 14, 2024, 7:27 PM

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///py

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sorry trying to format my code

topaz reef Jul 14, 2024, 7:29 PM

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undone gull You're removing 2 motorcycles. Not sure if that's what you meant to do

yeah for now that is fine. I'm just starting to learn. I did understand what I was doing though so understanding is the most important part right now.

topaz reef Jul 14, 2024, 7:30 PM

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undone gull You're removing 2 motorcycles. Not sure if that's what you meant to do

how do I format my code correctly in discord?

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`import re
motorcycles = []
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
motorcycles.append('harley')
motorcycles.append('kawasaki')
motorcycles.append('aprilia')
motorcycles.append('indian')
motorcycles.append('bmw')
motorcycles.insert(0, 'ducati')
del motorcycles [1]
popped_motorcycle = motorcycles.pop()
print(motorcycles)
print(popped_motorcycle)

last_owned = popped_motorcycle
message = (f"the last motorcycle I owned was a {motorcycles.pop()}")
print(re.sub('a ([aeiou]+)', r'an \1', message))`

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motorcycles = []
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
motorcycles.append('harley')
motorcycles.append('kawasaki')
motorcycles.append('aprilia')
motorcycles.append('indian')
motorcycles.append('bmw')
motorcycles.insert(0, 'ducati')
del motorcycles [1]
popped_motorcycle = motorcycles.pop()
print(motorcycles)
print(popped_motorcycle)

last_owned = popped_motorcycle
message = (f"the last motorcycle I owned was a {motorcycles.pop()}")
print(re.sub('a ([aeiou]+)', r'an \1', message))```

spark loomBOT Jul 14, 2024, 7:37 PM

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Hey @topaz reef!

It looks like you pasted Python code without syntax highlighting.

Please use syntax highlighting to improve the legibility of your code and make it easier for us to help you.

To do this, use the following method:
```py
print('Hello, world!')
```

This will result in the following:

print('Hello, world!')```
You can **edit your original message** to correct your code block.

topaz reef Jul 14, 2024, 7:38 PM

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motorcycles = []
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
motorcycles.append('harley')
motorcycles.append('kawasaki')
motorcycles.append('aprilia')
motorcycles.append('indian')
motorcycles.append('bmw')
motorcycles.insert(0, 'ducati')
del motorcycles [1]
popped_motorcycle = motorcycles.pop()
print(motorcycles)
print(popped_motorcycle)

last_owned = popped_motorcycle
message = (f"the last motorcycle I owned was a {motorcycles.pop()}")
print(re.sub('a ([aeiou]+)', r'an \1', message))```

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import re
motorcycles = []
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
motorcycles.append('harley')
motorcycles.append('kawasaki')
motorcycles.append('aprilia')
motorcycles.append('indian')
motorcycles.append('bmw')
motorcycles.insert(0, 'ducati')
del motorcycles [1]
popped_motorcycle = motorcycles.pop()
print(motorcycles)
print(popped_motorcycle)

last_owned = popped_motorcycle
message = (f"the last motorcycle I owned was a {motorcycles.pop()}")
print(re.sub('a ([aeiou]+)', r'an \1', message))```

#

import re
motorcycles = []
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
motorcycles.append('harley')
motorcycles.append('kawasaki')
motorcycles.append('aprilia')
motorcycles.append('indian')
motorcycles.append('bmw')
motorcycles.insert(0, 'ducati')
del motorcycles [1]
popped_motorcycle = motorcycles.pop()
print(motorcycles)
print(popped_motorcycle)

last_owned = popped_motorcycle
message = (f"the last motorcycle I owned was a {motorcycles.pop()}")
print(re.sub('a ([aeiou]+)', r'an \1', message))```

spark loomBOT Jul 14, 2024, 8:41 PM

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Python help channel closed

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#🔒 An f string that is a sentence with an embedded item from a list.