How to count a list? | Smarter Dev | Page 1

shrewd crescent Dec 29, 2022, 7:13 PM

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I have this list here and I want to count the number of patient there is.

patients = [Patient('Sara','Smith', 20, '07012345678','B1 234','Cold',''), Patient('Will','Smith', 24, '07012345678','B1 234','Diabetic',''),Patient('Sam','Jones', 21, '07012345678','B1 234','Cold',''), Patient('Mike','Jones', 37,'07555551234','L2 2AB','Diabetic',''), Patient('Daivd','Smith', 15, '07123456789','C1 ABC','Heart Disease','')]

safe topaz Dec 29, 2022, 7:21 PM

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len(patients)

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Well, if you have a heterogeneous list, you can use a for loop, a counter and isinstance to check if the current object is a patient and update the counter

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Since that's not the case right now, len will work fine.

shrewd crescent Dec 29, 2022, 7:30 PM

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I want something like```py
Registered Patients: 5

safe topaz Dec 29, 2022, 7:32 PM

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shrewd crescent I want something like```py Registered Patients: 5 ```

You would use a print statement with an f string

shrewd crescent Dec 29, 2022, 7:33 PM

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how do you do that

safe topaz Dec 29, 2022, 7:33 PM

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What?

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https://realpython.com/python-f-strings/

Python 3's f-Strings: An Improved String Formatting Syntax (Guide) ...

As of Python 3.6, f-strings are a great new way to format strings. Not only are they more readable, more concise, and less prone to error than other ways of formatting, but they are also faster! By the end of this article, you will learn how and why to start using f-strings today.

shrewd crescent Dec 29, 2022, 7:34 PM

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how do you do the f string? I'm new to python, learning.

safe topaz Dec 29, 2022, 7:35 PM

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Read the article above 🙂

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Basically, you can write code inside the curly braces

shrewd crescent Dec 29, 2022, 7:40 PM

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print('Registered Patients', {len(patients)}.format(patients))

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like that

safe topaz Dec 29, 2022, 7:43 PM

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That's not an f string

#How to count a list?