To fix the SyntaxError: f-string: unmatched ‘(‘ in Python, you need to pay attention to use single or double quotes in f-string. You can change it or not use it. Please read the following article for details.
What causes the SyntaxError: f-string: unmatched ‘(‘ in Python?
New built-in string formatting method from Python 3.6 in the following syntax:
f''a{value:pattern}b''
Parameters:
- f character: use the string f to format the string.
- a,b: characters to format.
- {value:pattern}: string elements need to be formatted.
- pattern: string format.
In simple terms, we format a string in Python by writing the letter f or F in front of the string and then assigning a replacement value to the replacement field. We then transform the replacement value assigned to match the format in the replace field and complete the process.
The SyntaxError: f-string: unmatched ‘(‘ in Python happens because you use unreasonable single or double quotes in f-string.
Example:
testStr = 'visit learnshareit website'
# Put variable name with the string in double quotes in f-string for formatting
newStr = f"{(testStr + "hello")}"
print(newStr)Output:
File "code.py", line 4
newStr = f"{(testStr + "hello")}"
^
SyntaxError: invalid syntaxHow to solve this error?
Change the quotes
The simplest way is to change the quotes. If your f-string contains double quotes, put the string inside it with single quotes.
Example:
testStr = 'visit learnshareit website'
# Use single quotes for strings in f-string when f-string contains double quotes
newStr = f"{(testStr + ' hello')}"
print(newStr)Output:
visit learnshareit website helloSimilarly, we will do the opposite if the f-string carries single quotes. The string in it must carry double quotes.
Example:
testStr = 'visit learnshareit website'
# f-string contains single quotes. The string must contain double quotes
newStr = f'{(testStr + " hello")}'
print(newStr)Output:
visit learnshareit website helloDo not use single or double quotes
If the problem is with quotes confusing you, limit their use inside the f-string.
Example:
- I want to concatenate two strings instead of using quotes inside the f-string. Then I declare 2 variables containing two strings and use the addition operator to concatenate two strings inside f-string so that will avoid SyntaxError: f- string: unmatched ‘(‘.
testStr = 'visit learnshareit website'
secondStr = '!!!'
newStr = f'{ testStr + secondStr }'
print(newStr)Output:
visit learnshareit website!!!Summary
The SyntaxError: f-string: unmatched ‘(‘ in Python has been resolved. You can use one of two methods above for this problem. If there are better ways, please leave a comment. We appreciate this. Thank you for reading!
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My name is Jason Wilson, you can call me Jason. My major is information technology, and I am proficient in C++, Python, and Java. I hope my writings are useful to you while you study programming languages.
Name of the university: HHAU
Major: IT
Programming Languages: C++, Python, Java