Python Quick Tip: F-Strings - How to Use Them and Advanced String Formatting

In this Python Programming Tutorial, we will be learning how to use f-strings to format strings. F-strings are new to Python3.6+ and are extremely useful once you learn how to use them. Viewers have likely seen me use f-strings in previous videos so this video will go into detail exactly how to use them so that everyone can follow along confidently. Let's get started...

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#Python

[sandeepvk]

f string is god send. I am glad I started python in the post 3.6 era

[slavoie]

One cool use of f-strings can be to iterate over a dictionary where the keys are strings of integers for some reason (using a JSON dictionary for instance) and get the values out of it directly with integers. No need to add an extra step to convert to strings, just use an f-string!

Example:
>>> mydict = {'0': 30, '1': 12, '2': 6, '3': 11, '4': 20} # using strings as keys
>>> [mydict[f'{i}'] for i in range(4)] # list comprehension to retrieve values in dictionary based on integer
>>> [30, 12, 6, 11] # list of values retrieved

Hopefully someone will find that useful... or at least somewhat interesting :).

[lalligood]

I've been using f-strings for a while but never about the colon formatting "tricks" before this. Nice!

[theegreatestever]

Its amazing how short but absolutely clear and excellently explained your videos are. Thank you from South Africa

[stuthomas]

Another excellent video from Corey Schafer. Easily the best python instructor on YouTube. I'll be switching to f-string from now on.

[TheVerucAssault]

This is probably the best video I have seen explaining how F strings work. Thanks.

[doruletu]

Thanks Corey Schafer for f' string quick video explanation!

[noobinvestor]

Precise, informative and exact..how do you do this Corey?

[ajkraftt]

This was the first time I liked, subscribed and hit the bell icon before being asked. This explains #fstrings on an intuitive level. Well done with the comparisons as well!

[SACHIN-gdzy]

Hey Buddy ur videos are of top quality

[lucasflores]

your english is clear, your teaching skills are amazing. Thanks!

[WisomofHal]

I was introduced to f-strings today in John Zelle's Intro to Computer Science: Python Programming book, which is very good and has taught me the Python I know, so far. I wasn't grasping the concept as quickly as I expected from the book, which has been the only thing I haven't been able to grasp within a few days so I came here to your channel. This makes f-strings look so sexy. Thanks a lot!

[WisomofHal]

Wow! Came back to this video after letting f'strings mingle in my mind for a few weeks and this is even more golden haha. Really like the calculation exercise you showed uses f'string it's so cool Python allows us to run calculations within the {} Thanks again coach!

[srikanthspl]

Such a delightful feature! Thanks Corey.

[akira_asahi]

Thank you for the video. I am gratuful for your time and contribution. Kind regards, Akira.

[kelue]

I am in Shanghai, China. Watching your video is very helpful. I am very interesting about Python.

[dsuryas]

this is similar to template literals in javascript, awesome. Thanks, bro!

[TechReptile]

I have followed your video and get courage to learn python.
Thanks god I have find you.
You are really a good guy. Thanks a lot.
Just carry on.

[sampanicker]

this video was very helpful. Thanks Corey!!

[KakaTu]

Helpful video, easy and to the point . Thanks mate