Python comment inside a multi-line string

No. ''' is a multi-line string. Anything inside it is part of the string, even lines starting with #.

If you're in a situation where you need to quickly comment/uncomment part of the string and you don't mind using a function, you can abuse str.join:

foo = '\n'.join((
    'some',
    'important',
    'stuff',
))

print(foo)

outputs

some
important
stuff

while

foo = '\n'.join((
    'some',
#     'important',
    'stuff',
))

print(foo)

outputs

some
stuff

It is impossible, because ''' is a multi-line string. Everything inside it is a string. If you explain why you need it I can think of an other solution for your problem.

Basically, no. You could do something like

f'''
one line
two line
{"# A comment"[:0]}
fourth line
'''

The '{...}' will be replaced by nothin. There will be an empty line tho.

You can remove the empty line also, but then you need a { on the line beform

f'''
one line
two line{
"#comment"[:0]}
three line
'''

I ran into this issue while maintaining prompts for LLMs. English is code now, and I'd like to comment the rationale behind different sections as the prompt evolves.

I made a function to drop any lines from a multi-line string that start with a # character.

def remove_comments(text):
    lines = [line for line in text.split('\n') if not line.startswith('#')]
    return '\n'.join(lines)

prompt = """You are a agent that assists with ___.
# cut unnecessary chatter at end of replies
Do not show appreciation in your responses, say only what is necessary."""

remove_comments(prompt)
# 'You are a agent that assists with ___.\nDo not show appreciation in your responses, say only what is necessary.'

Comments are often outdated as they are not maintained and overlooked by the IDE.

How about a function, you still can add your comment there but at least we have some code as a foundation

def define_an_important_string() -> str:
    """
    some things here are important
    
    Returns: string with stuff (maybe important)

    """
    return '''
    some stuff
    '''