[Python] Comment in python changes apache mimetype

I have a simple python cgi script: (my python is Python 3.9.21)

#!venv/bin/python

# " xxx "

def main():
html = """

<!DOCTYPE html>
<html>
</html>
"""
print(html)
exit(0)

if __name__ == "__main__": main()


When I access this using curl, I get this:

$ curl -v http://.../gordo.py
* Trying 10.1.31.11:80...
* Connected to ... (10.1.31.11) port 80 (#0)
> GET /gordo.py HTTP/1.1
> Host: ...
> User-Agent: curl/7.76.1
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Date: Thu, 22 May 2025 03:11:21 GMT
< Server: Apache/2.4.62 (CentOS Stream) OpenSSL/3.5.0
< Transfer-Encoding: chunked
< Content-Type: text/html; charset=UTF-8
<

<!DOCTYPE html>
<html>
</html>

* Connection #0 to host ... left intact


but when I change the xxx to the:

#!venv/bin/python

# " the "

def main():
html = """

<!DOCTYPE html>
<html>
</html>
"""
print(html)
exit(0)

if __name__ == "__main__": main()


I get this:

$ curl -v http://.../gordo.py
* Trying 10.1.31.11:80...
* Connected to ... (10.1.31.11) port 80 (#0)
> GET /gordo.py HTTP/1.1
> Host: ...
> User-Agent: curl/7.76.1
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Date: Thu, 22 May 2025 03:18:58 GMT
< Server: Apache/2.4.62 (CentOS Stream) OpenSSL/3.5.0
< Transfer-Encoding: chunked
< Content-Type: text/plain; charset=UTF-8
<

<!DOCTYPE html>
<html>
</html>

* Connection #0 to host ... left intact


Note that the Content-Type has changed from text/html to text/plain.

I plan to manually set the Content-Type in my script, but I'd like to understand how a commented-out line changes how Apache guesses at the mimetype.

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