Stack Overflow
Stack Overflow

Questions tagged [f-string]

Literal string interpolation in Python

An f-string is the abbreviated name for a "formatted string" syntax that was introduced in Python 3.6 and extended in Python 3.7. They enable literal string interpolation: 

>>> value = 80
>>> f'The value is {value}.'
'The value is 80.'

See PEP 498 for a comprehensive description of the feature, and also PEP 536 for the final grammar.

621 questions
0
votes
1 answer

Unsure how to manage my variables/data using tkinter and openpyxl: fstring issue

I am creating an app on a Raspberry Pi (if its at all relevent) which needs to access data from specific cells from a spreadsheet in order to display the settings as button text. There are multiple 'modes', settings and buttons. The button that may…
Matthew Axe
  • 21
  • 5
0
votes
4 answers

Is there a reverse "fstring"?

I need to find a way to call a way to use something with fstring syntax to retrieve information from a string. My goal is to use the same fstring to create a string, and then decode it. For example: def encode(): a = "fizz" b = "buzz" …
Apitronix
  • 305
  • 2
  • 13
0
votes
1 answer

Nested f-strings in Python (Third nested f-string)

I need to convert json to given hcl structure. There is this code: user_dicts = { 'users': [ {'name': 'test1', 'pass': 'password1', 'permissions': [ {'access': 'yes', 'role': 'admin'}, {'access': 'yes', 'role': 'user'} ] }, {'name': 'test2', 'pass':…
RMNTRVN
  • 63
  • 1
  • 5
0
votes
2 answers

How to use escape characters in python fstrings deprecated, without converting to raw string

When running python3.10 -B -Wall testcode.py I get the following deprecation warnings in my code which I would like to fix DeprecationWarning: invalid escape sequence '\:' DeprecationWarning: invalid escape sequence '\:' DeprecationWarning: invalid…
remustata
  • 69
  • 2
  • 5
0
votes
2 answers

Problem with alligning my output (f string) Python

I am having some trouble with aligning things in my output. Down below I have copied the expected output and the output my code gives me. It is very similar, however, the numbers aren't aligned correctly. My numbers would align to the right (and…
Fedra Herman
  • 77
  • 8
0
votes
1 answer

Strange behavior when trying to create and write to a text file on macOS

I'm opening a plain text file, parsing it, and adding different lines to existing, empty string variables. I add these variables into a new variable that is a multi-line fstring. Trying to write the data to a new text file is not behaving as…
liquidRock
  • 327
  • 2
  • 12
0
votes
1 answer

Trying to use f' string to print out a list but not the string

I'm trying to print out a list using a following code: list_1 = [1,2,3] list_2 = [1,2,3,4] list_3 = [1,2,3,7,9] list_4 = [1,2,7,11,12,15] for x in range(1,5): print(f'list_{x}') print(list_1) which outputs the…
Jason
  • 35
  • 4
0
votes
1 answer

How can I pad an fstring with dictionary values in

I can use fstring with a dictionary: mydict = {'foo': 'py', 'bar': 'thon'} print(f"I am using {mydict['foo']}{mydict['bar']}") > I am using python I can also pad strings: f"{'Foo': <16} Bar" >'Foo Bar' I want to be able to pad a…
Tim Edwards
  • 1,031
  • 1
  • 13
  • 34
0
votes
1 answer

Indentation appears in the output string when broken it over multiple lines

I have large f-string, and I am braking it (see below), for code readability. but when I print (print to file, it is String.IO object) the string I get the indentation leading each new line (except the first), and I don't want that (my IDE is…
Adam
  • 2,820
  • 1
  • 13
  • 33
0
votes
4 answers

How do you round all decimal places to 2?

Noob to Python and new to Code in general. I "know" how to use the round function and can use it for numbers that have more then 2 decimal places. My question is how do I get numbers that only have 1 decimal place to add the zero to make it to two…
desolator_net_decker
  • 13
  • 3
0
votes
2 answers

Lambda f-string for JSON string?

I have a JSON body string in python that contains lorem ipsum e.g. body = '[{ "type": "paragraph", "children": [ { "text": "lorem ipsum" } ] } ]' I want to create a lambda f-string that can take any string and place it where lorem ipsum is. E.g. #…
Chris
  • 500
  • 6
  • 25
0
votes
2 answers

Why do not f-strings work in comprehensions inside other f-strings?

I would like to use an f-string inside a generator which I put inside another f-string, such as here: MORSE_CODE = {'123' : '456', '789' : 'qwe'} print(f'{(f'{key}, {value}' for key, value in MORSE_CODE.items())}') When this was run I got the next…
Vovin
  • 720
  • 4
  • 16
0
votes
1 answer

f string backslash escape

I have a request payload where i need to use a variable to get details from different products payload =…
Herminio Henriques
  • 15
  • 5
0
votes
2 answers

Add spaces at the beginning of the print output in python

I'm wondering how Am I suppose to add 4 spaces at the beginnings of the print outputs with f-string or format in python? This is what I use to print now: print('{:<10}'.format('Constant'),'{:{width}.{prec}f}'.format(122, width=10, prec=3)) and my…
Andrew Swainskeren
  • 67
  • 7
0
votes
1 answer

Function argument for an f-string '=' debugging operator

How to pass a variable for an f-string '=' debugging operator? from datetime import datetime def print_var(var): print(str(datetime.now())[:19], end=' ') print(f'{var = }') test = 5 print_var(test) I expect print_var(test) to print the…
OneArb
  • 453
  • 2
  • 14
1 2 3
…
41 42