Ohms wheel part | Python Fiddle

# e = volt = r * i, p / i, sqrt(p * r)
# i = amp = sqrt(p / r), p / e, e / r
# r = ohm = e / i, e**2 / p, p / i**2
# p = watt = e**2 / r, i**2 * r, e * i

import math

print "How many volts?"
e = raw_input("")
#print e, " volts"

print "How many amps?"
i = raw_input("")
#print i, " amps"

print "How many ohms?"
r = raw_input("")
#print r, " ohms"

print "How many watts?"
p = raw_input("")
#print p, " watts"

# convert anything entered to int... may need float
e = int(e)
i = int(i)
r = int(r)
p = int(p)

# find the value of volts
def volts(e, i, r, p):
    if r > 0 and i > 0:
        e = r * i
        return e
    else:
        if r > 0 and p > 0:
            e = math.sqrt(p * r)
            return e

#find the value of amps
def amps(e, i, r, p):
	if e > 0 and r > 0:
		i = e / r
		return i
	else:
		if p > 0 and r > 0:
			i = math.sqrt(p / r)
			return i

# find value of ohms
def ohms(e, i, r, p):
	if e > 0 and i > 0:
		r = e * i
		return r
	else:
		if p > 0 and i > 0:
			r = p / i**2
			return r

# find value of watts
def watt(e, i, r, p):
	if e > 0 and r > 0:
		p = e**2 / r
		return p
	else:
		if i> 0 and r > 0:
			p = i**2 * r
			return p
	
e = volts(e, i, r, p)
i = amps(e, i, r, p)

print e, "volts..."
print i, "amps..."
print r, "ohms..."
print p, "watts..."

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