Cast string with decimal to int before putting it in JSON over Python

Question

I'm trying to change a value, which is parsed through CGI over GET to Python before I want to send all the values over MQTT with JSON.

The value is as follows:

exposure = "0.0"

which is gained over CGI like so:

if form.getvalue("exposure"):
        req["excompensaton"] = form.getvalue("exposure")

Sadly, however, the value needs to be "0", not "0.0" before I can send it over MQTT with JSON.

I've tried:

if form.getvalue("exposure"):
        req["excompensaton"] = int(form.getvalue("exposure")

Sadly this came up with the error:

ValueError: invalid literal for int() with base 10: '0.0'

I also tried math.floor, but it ended up telling me that it needs to float.

Any help would be really appreciated!!

Answer 1

If the behavior of int() is what you want, cast to a float first:

int(float(form.getvalue("exposure")))

If you want to be certain of getting one of math.floor() or math.ceil(), you can incorporate those:

int(math.floor(float(form.getvalue("exposure"))))