If statement syntax error

[OkieWolf]

def button3_tapped(sender):
    sidea = float(v['textfield3'].text)I
    sideb = float(v['textfield4'].text)
    sidec = float(v['textfield5'].text)
    if sidea is not None and sideb is not None
        sidec = sidea + sideb
        v['label1'].text = 'sidec = ' + str(sidec)

I have a dialog box with three text fields and a button. Upon pushing the button I want to look at the three fields and see if they’re blank. If two are not then do something. I keep getting a syntax error on the above if statement and can’t figure out why.
I also tried if (sidea.length()!=0)

[cvp]

@OkieWolf I understand, I only want to show what @ccc adviced. The triangle code without any print and only one print of triangle results

[OkieWolf]

@cvp

I think I understand now. But I can’t get the indentation at “return” to stop erroring.

import math

def triangle(short, long, hypotenuse, angle):
    if len([x for x in (hypotenuse, short, long, angle) if x]) != 2:
        raise ValueError("Exactly two parameters must be zero.")
    if hypotenuse and angle:
        angle = math.radians(angle)
        print   ('Short = ' + str(hypotenuse * (math.sin(angle))))
        print   ('Long = ' + str(hypotenuse * (math.cos(angle))))
    elif long and angle:
        angle = math.radians(angle)
        print   ('Short = ' + str(long * (math.tan(angle))))
        print   ('Hypotnuse = ' + str(long / (math.cos(angle))))
    elif short and angle:
        angle = math.radians(angle)
        print   ('Long = ' + str(short / (math.tan(angle))))
        print   ('Hypotnuse = ' + str(short / (math.sin(angle))))
    elif hypotenuse and short:
        print ('Long = ' + str(math.sqrt(hypotenuse ** 2 - short ** 2)))
        print ('Angle = ' + str(math.degrees(math.asin(short / hypotenuse))))
    elif hypotenuse and long:
        print ('Short = ' + str(math.sqrt(hypotenuse ** 2 - long ** 2)))
        print ('Angle = ' + str(math.degrees(math.acos(long / hypotenuse))))
    elif short and long:
        print ('Hypotenuse = ' + str(math.sqrt(short ** 2 + long ** 2)))
        print ('Angle = ' + str(math.degrees(math.atan(short / long))))
  return(short, long, hypotenuse, angle)
        
#triangle(5,0,10,0) 

[ccc]

from math import acos, asin, atan, cos, degrees, radians, sin, sqrt, tan


def triangle(short, long, hypotenuse=0, angle=0):
    if (hypotenuse, short, long, angle).count(0) != 2:
        raise ValueError("Exactly two parameters must be zero.")
    radians_angle = radians(angle)
    if short:
        if long:
            hypotenuse = sqrt(short ** 2 + long ** 2)
            angle = degrees(atan(short / long))
        elif hypotenuse:
            long = sqrt(hypotenuse ** 2 - short ** 2)
            angle = degrees(asin(short / hypotenuse))
        else:  # short and angle
            long = short / tan(radians_angle)
            hypotenuse = short / sin(radians_angle)
    elif long:
        if hypotenuse:
            short = sqrt(hypotenuse ** 2 - long ** 2)
            angle = degrees(acos(long / hypotenuse))
        else:  # long and angle
            short = long * tan(radians_angle)
            hypotenuse = long / cos(radians_angle)
    else:  # hypotenuse and angle
        short = hypotenuse * sin(radians_angle)
        long = hypotenuse * cos(radians_angle)
    short, long, hypotenuse = sorted([short, long, hypotenuse])
    return float(short), float(long), float(hypotenuse), float(angle)


# The result for each of these should be (3.0, 4.0, 5.0, 36.8698976458440x)
print(triangle(3, 4))  # short and long
print(triangle(3, 0, 5))  # short and hypotenuse
print(triangle(0, 4, 5))  # long and hypotenuse
print(triangle(0, 0, 5, 36.86989764584402))  # hypotenuse and angle

[ccc]

This post is deleted!

[cvp]

@ccc as short and long are différent, why do you think angle could be 45°?

[cvp]

@ccc error, you use angle instead of radians_angle

    else:  # hypotenuse and angle
        short = hypotenuse * sin(radians_angle)
        long = hypotenuse * cos(radians_angle) 

[ccc]

Thanks! Now you know why I failed trig back in the day...

Both issues fixed in the code above.

[ccc]

For completeness...

def button3_tapped(sender):
    hypotenuse = float(v['hypotenuse'].text or 0)
    short = float(v['short'].text or 0)
    long = float(v['long'].text or 0)
    angle = float(v['angle'].text or 0)
    try:
        short, long, hypotenuse, angle = triangle(short, long, hypotenuse, angle)
    except ValueError:
        v['mess'].text = "Enter two fields"
        v['mess'].background_color = 'red'
        v['mess'].text_color = 'white'
        return
    v['short'].text = str(short)
    v['long'].text = str(long)
    v['hypotenuse'].text = str(hypotenuse)
    v['angle'].text = str(angle)

[cvp]

@ccc said:

For completeness..

def button3_tapped(sender):
    # erase previous eventual error message
    v['mess'].text = ""
    v['mess'].background_color = 'white'
    .
    .
    .