BMI.py | Python Fiddle

"""Program to calculate BMI that demonstrates many commonly used utilities
"""

# function for caclulating BMI (weight in kilos / height in meters squared)
def BMI_calc (height,weight):
    height_meters = height * 0.0254        # converts inches to meters
    height_m_sqr = height_meters ** 2      # squares height in meters
    weight_kilos = weight * 0.453592       # converts pounds to kilos
    BMI = weight_kilos / height_m_sqr
    return BMI                             # returns the final calculated BMI

# routine for obtaining height in either inches or feet and inches
noProb = False
while noProb == False:
    inp_height = raw_input("How tall are you in 'inches' or in 'feet, inches'? ")
    try:
        if ',' in inp_height:                          
            feet, inches = inp_height.split(',')     
            height = float(feet) * 12 + float(inches)
        else:
            height = float(inp_height)
        noProb = True
    except:
        print 'Enter height in inches as a number.'

# routine for obtaining weight in pounds
noProb = False
while noProb == False:
    inp_weight = raw_input('What is your weight in pounds? ')
    try:
        weight = float(inp_weight)
        noProb = True
    except:
        print 'Enter weight as a number.'

print BMI_calc(height, weight)

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