How to have { and ' into python f string

Question

Hi

I am using python f string as below:
def testMethod(ch):
return f'{ch}='

print(testMethod('B'))

Above code helps me print B= as expected.

What if I would need { and ' into this? Something like B='int' and {} is my expected output and hence I tried below:
return f'{ch}='int' and {}'

As Above was not working, I tried with backslash as below , but no success..!
return f'{ch}=\'int\' and \{\}'

Any solution of this?

Answer 1

You can double up the brace to have a single brace printed.
Backslash quotation mark \' prints a quotation mark. But also you can use the double-quotation mark as the string delimiter if you wish to include a single-quotation mark inside the string.

Working examples:
print(f' \'{{') # output: '{
print(f" '{{") # output: '{

And vice versa
print(f' "}}') # output: "}

Answer 2

Here’s another one:

print(f"-> {chr(123) + 'hello' } '%' {chr(125)} <-\n\tworld!!!")

Answer 3

Yet another, using the C-like metacharacter escape with octal values of the characters:

print(f'\042 \047 \173 \175')
# output
# " ' { }

This works inside ordinary strings too; not just f-strings.

Answer 4

I didn't read your question carefully enough and though you want the method to print
{B}=
as the output.

I thought it was return f"\{{}\}=" at first but it failed.
With a little research, it uses double curly braces {{ and }} as escape character.
https://stackoverflow.com/questions/5466451/how-do-i-escape-curly-brace-characters-in-a-string-while-using-format-or

Thus, the method becomes:
def testMethod(ch):
return f"{{{ch}}}="
print(testMethod("B")) >>> {B}=

Answer 5

To include curly braces `{}` and single quotes `'` inside an f-string in Python, you can escape them with double curly braces `{{}}` and double single quotes `''`. Here's how you can modify your code:

```python
def testMethod(ch):
return f"{ch}='int' and {{}}"

print(testMethod('B'))
```

This will print:

```
B='int' and {}
```

Using double curly braces `{{}}` escapes the curly braces and allows them to be included as literal characters in the string. Similarly, using double single quotes `''` escapes the single quotes and includes them as literal characters in the string.

Answer 6

Thanks Brian . Exactly what I was looking for..

https://sololearn.com/compiler-playground/cN07aiL82rvp/?ref=app