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I want to use f string formatting instead of print. However, I get these errors: Unterminated expression in f-string; missing close brace Expected ')'
var="ab-c"
f"{var.replace("-","")}text123"
I tried to use single quote f'' and also double brackets but neither of them worked. Any idea about how to fix this?
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Format strings contain “replacement fields” surrounded by curly braces {}. Anything that is not contained in braces is considered literal text, which is copied unchanged to the output. If you need to include a brace character in the literal text, it can be escaped by doubling: {{ and }}.
Also called “formatted string literals,” f-strings are string literals that have an f at the beginning and curly braces containing expressions that will be replaced with their values.
Python f-string Quotation Marks To use quotation marks in f-string in Python, you have to only avoid using the same type of quotations as used with the f. And in case you have to use the same quotes in the string as well as with the f, use the backslash character to escape.
Strings in Python are usually enclosed within double quotes ( "" ) or single quotes ( '' ). To create f-strings, you only need to add an f or an F before the opening quotes of your string. For example, "This" is a string whereas f"This" is an f-String.
Python identifies the problem and tells you that it exists inside the f-string. The message "unterminated string" also indicates what the problem is. The caret in this case only points to the beginning of the f-string.
Python f-string is a string literal that starts with letter f and has curly braces ({}, placeholder) containing the variables, which will change into the value of that variable. It was added in Python 3.6.0 as PEP-498 – Literal String Interpolation.
You can print braces/brackets using the Python f-strings by using two braces to print single brace and 4 braces to print double braces. How to do a dictionary format with f-strings in Python 3? Since dictionaries involve quotes, using them inside the f-string could be tricky.
This is also called f-string padding in Python. How to pad string with zero in Python f-strings (0-Padding)? We can pad a string with zeros (0-Padding) in Python f-strings by adding {variable:0N} inside the braces, where N stands for total number of digits-
For f"{var.replace("-","")}text123", Python parses f"{var.replace(" as a complete string, which you can see has an opening { and opening (, but then the string is terminated. It first expected a ) and eventually a }, hence the error you see.
To fix it, Python allows ' or " to enclose a string, so use one for the f-string and the other for inside the string:
f"{var.replace('-','')}text123"
or:
f'{var.replace("-","")}text123'
Triple quotes can also be used if internally you have both ' and "
f'''{var.replace("-",'')}text123'''
or:
f"""{var.replace("-",'')}text123"""
Use single quotes:
var="ab-c"
f'{var.replace("-","")}text123'
# display abctext123
var = "ab-c"
f"{var.replace('-','')}text123"
always use a different quote character than the ones inside the f-string
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