TypeError: float() argument must be a string or a number, not 'NoneType' Trying to take in-CodePudding

So essentially I'm trying to make a combustion analysis solver where it takes in a mass (with the likelihood of there being decimals) of water and carbon dioxide (CO2) and then also the mass of the CxHyOz to find the empirical formula for such a problem. But it is giving me an error on my input line. It's been many years since I've written in python but I figured it would be faster this way because of the minimal syntax required lol. one small project has now taken up many hours.

The error I'm getting...

>>> 
= RESTART: C:/Users/Minec/OneDrive/Documents/Python Files/CombustionAnalysis.py
What is the mass of the CO2? 
Traceback (most recent call last):
  File "C:/Users/Minec/OneDrive/Documents/Python Files/CombustionAnalysis.py", line 9, in <module>
    massCarbonDioxide = float(print("What is the mass of the CO2? "))
TypeError: float() argument must be a string or a number, not 'NoneType'
>>>

my code:

##Constants
waterMM = 18.0158
carbonDioxideMM = 44.0115
cMM = 12.010
hMM = 1.0078
oMM = 15.999

##variable inputs
massCarbonDioxide = float(print("What is the mass of the CO2? "))
massWater = float(print("What is the mass of the water? "))
totMass = float(print("What is the total mass of the compound X? "))

#calculating moles of CO2 and water
molesCarbonDioxide = massCarbonDioxide / carbonDioxdideMM
molesWater = massWater / waterMM

#calculating moles of Hydrogen and Carbon
molesH = 2 * molesWater
molesC = molesCarbonDioxide

#calulating mass of Hydrogen Carbon and Oxygen
massH = molesH * hMM
massC = molesC * cMM
massO = (totMass - massC) - massH

#dealing with oxygen
oxygenPresent = false
molesO = 0.0000000000000000000
if(massO > 0):
    molesO = massO / oMM
    oxygenPresent = true

#finding the minimum moles
minMole = 0.000000000000000000
if(oxygenPresent):
    if(molesH < molesC):
        if(molesH < molesO):
            minMole = molesH
        else:
            minMole = molesO
    else:
        if(molesC < molesO):
            minMoles = molesC
        else:
            minMoles = molesO
else:
    if(molesH < molesC):
        minMoles = molesH
    else:
        minMoles = molesC

#calculating mole ratio
molesH = molesH / minMoles
molesC = molesC / minMoles
if(oxygenPresent):
    molesO = molesO / minMoles

i = 1
if(oxygenPresent):
    if(molesH == 1):
        go = true
        while(go):
            if((((molesC * i) % 1) > 85) or (((molesC * i) % 1) < 15)):
                molesC = molesC * i
                molesO = molesO * i
                molesC = round(molesC,0)
                molesH = molesH * i
                if((((molesO * 1) % 1) > 85) or (((molesO * 1) % 1) < 15)):
                    molesO = round(molesO,0)
                else:
                    gogo = true
                    ii = 1
                    while(gogo):
                        if((((molesO * ii) % 1) > 85) or (((molesO * ii) % 1) < 15)):
                            molesO = molesO * ii
                            molesO = round(molesO,0)
                            molesH = molesH * ii
                            molesC = molesC * ii
                            gogo = false
                        else:
                            ii = ii   1
                go = false
            else:
                i = i   1
    elif(molesC == 1):
        go = true
        while(go):
            if((((molesH * i) % 1) > 85) or (((molesH * i) % 1) < 15)):
                molesH = molesH * i
                molesO = molesO * i
                molesH = round(molesH,0)
                molesC = molesC * i
                if((((molesO * 1) % 1) > 85) or (((molesO * 1) % 1) < 15)):
                    molesO = round(molesO,0)
                else:
                    gogo = true
                    ii = 1
                    while(gogo):
                        if((((molesO * ii) % 1) > 85) or (((molesO * ii) % 1) < 15)):
                            molesO = molesO * ii
                            molesO = round(molesO,0)
                            molesH = molesH * ii
                            molesC = molesC * ii
                            gogo = false
                        else:
                            ii = ii   1
                go = false
            else:
                i = i   1
    else:
        go = true
        while(go):
            if((((molesC * i) % 1) > 85) or (((molesC * i) % 1) < 15)):
                molesC = molesC * i
                molesH = molesH * i
                molesC = round(molesC,0)
                molesO = molesO * i
                if((((molesH * 1) % 1) > 85) or (((molesH * 1) % 1) < 15)):
                    molesH = round(molesH,0)
                else:
                    gogo = true
                    ii = 1
                    while(gogo):
                        if((((molesH * ii) % 1) > 85) or (((molesH * ii) % 1) < 15)):
                            molesH = molesH * ii
                            molesH = round(molesH,0)
                            molesO = molesO * ii
                            molesC = molesC * ii
                            gogo = false
                        else:
                            ii = ii   1
                go = false
            else:
                i = i   1
else:
    if(molesH == 1):
        go = true
        while(go):
            if((((molesC * i) % 1) > 85) or (((molesC * i) % 1) < 15)):
                molesC = molesC * i
                molesC = round(molesC,0)
                molesH = molesH * i
                go = false
            else:
                i = i   1
    else:
        go = true
        while(go):
            if((((molesH * i) % 1) > 85) or (((molesH * i) % 1) < 15)):
                molesH = molesH * i
                molesH = round(molesH,0)
                molesC = molesC * i
                go = false
            else:
                i = i   1


#printing out the empirical formula
if(oxygenPresent):
    print("C",molesC,"H",molesH,"O",molesO)
else:
    print("C",molesC,"H",molesH)

CodePudding user response：

I am very dumb the input lines under secition ##variable inputs needed to read:

##variable inputs
massCarbonDioxide = float(input("What is the mass of the CO2? "))
massWater = float(input("What is the mass of the water? "))
totMass = float(input("What is the total mass of the compound X? "))

CodePudding user response：

Note that the Python print function does not return anything. Instead, it simply outputs to the console. That is why Python is complaining about trying to convert a none type to a float.

You need an input, however, and that can be done with the input function like so:

massCarbonDioxide = float(input("What is the mass of the CO2? "))

Just to note, your booleans also should be capitalized. Rather than false, it should be False!