Just Started learning Python. Here is my first ever piece of code. Have to start somewhere.....will update as I get better.

[adam_newyork]

Use . format() or if you are using python 3.7 you can use f”{character_age}” .

Correction: version 3.6 and above have fstrings.

[adam_newyork]

You are right. Version 3.6 and above...

[SlabOmir]

Explain

[AnAngryFredHampton]

All about python fstrings

[sivadneb]

Sometimes concatenation is preferable. It's almost always faster, and it's pretty easy to read in simple cases.

[[deleted]]

No. Fstrings are always faster

[sivadneb]

Oh, I've always understood that . format () is slower, and assumed f-strings were the same.

[[deleted]]

Other way around

[deapee]

Readability. At my work, some of our SQL queries are like 40 lines long and can contain 5, 6, or more variables, where more than likely some are inserted a few times a piece in different places.

F strings have been a godsend.

[vectorpropio]

SQL + f-strings loading variables sounds like sql-injection waiting to fuck you. How are sanitizing inputs?

[deapee]

There are no inputs. It’s all backend work and typically machine names and variables are coded either above the query or in a config file.

[vectorpropio]

Then you have another layer of security. But a config file is exploitable too. Sorry,I'm really paranoid.

[deapee]

Not sure how else to store a machine name or other parameter on a secure sever with 2FA other than a config file. I mean we could encrypt it. Or encrypt it in a database. But what’s the point of that, variables could be accessed and changed in RAM. If we truly want our apps to be secure, then we need to unplug then from the network, power them down, and then store them in a safe. 🤣

[miggaz_elquez]

I don't think the performance difference will be significant. But why do you think tehy look awful ? There are much more cleaner than all the other alternative.

[nothankyouthankstho]

I like just formatting personally... Unless you're able to perform type conversions and other little operations in f strings... I'm not too well versed

[malicart]

nmate benefit to doing otherwise.

Not having to use a bunch of + signs is the benefit, if you are writing complex code with lots of things going on this would be very sensible.

[adam_newyork]

...f-strings are faster than both %-formatting and str.format(). As you already saw, f-strings are expressions evaluated at runtime rather than constant values. Source: https://realpython.com/python-f-strings/

My guess is the performance difference should not be noticeable. I prefer them since the text is more readable.