Adding and Averaging Variables in Python.

Thanks for you help, I do get the same error message. Also if I change the int for a str

Thanks for you help, I do get the same error message. Also if I change the int for a str

Post an updated screen shot.

here it is

That's a very different error message.

The string variables you're trying to use aren't just numbers. They have that string (" kWh") at the end. You either need to get rid of it before you do the calculation, or you need to not have it in the variable at all. Without seeing all your code there's no way to know which is better.

As FlyingDiver says you aren't dealing with a valid numeric field.

You could change your code to something like this:

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theVar1 = indigo.variables[258092774].value
theVar2 = indigo.variables[1797074476].value
theVar1Float = float(theVar1.split(' ')[0])  # splits the field on a space and you access the first element in the resultant list [0] and converts it to a float as your field has a decimal point
theVar2Float = float(theVar2.split(' ')[0])
theDiffFloat = theVar1Float - theVar2Float
theDiffString = str('%.3f kWh' % theDiff)  # gives you 3 decimal places
indigo.variable.updateValue(783072313, theDiffString)


Note the change to setting theVar1 and theVar2 variables to their values i.e. .value added to end

Double check my transcription of your variable Id numbers as I had to copy them from your screen capture

Thank you both, I will have a look if I can get rid of the kWh.

It works! I got rid of the kWh in the variables and changed the int to float.

Thanks again.

So I'm trying to get this small bit of code to work, but the problem I'm having is my variables are decimal numbers, not whole numbers.

When I manually enter whole numbers into Var1 and Var2, it works fine, but am hoping to get python to deal with the decimals

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# Listing variables, subtracting, updating variable

theVar1 = indigo.variables[392364558]
theVar2 = indigo.variables[908595901]

theDif =str(int(theVar1.value) - int(theVar2.value))

indigo.variable.updateValue(1505943804, ((theDif)))


Here is the error code:

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Script Error                    embedded script: invalid literal for int() with base 10: '52.3'
   Script Error                    Exception Traceback (most recent call shown last):

     embedded script, line 6, at top level
ValueError: invalid literal for int() with base 10: '52.3'


You can't do "int()" on a non-integer.

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# Listing variables, subtracting, updating variable

theVar1 = indigo.variables[392364558]
theVar2 = indigo.variables[908595901]

theDif =str(float(theVar1.value) - float(theVar2.value))

indigo.variable.updateValue(1505943804, theDif)

its the little things... I would have never figured that out.

THANKS!!

Joe is of course right, but he means you can't do int() on a non-integer--when it's cast as a string.

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>>> a = '52.3'
>>> print(int(a))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '52.3'

>>> a = 52.3
>>> print(int(a))
52

>>> a = '52'
>>> print(int(a))
52