Proporzioni[ITA].py

def prop():
 try:
  print("\n"*1000)
  valid="abcdefghijklmnopqrstuvwyzABCDEFGHIJKLMNOPQRSTUVWYZ!#$%&\'()*+,-./;<>?@[\\]^_`{|}~ \t\n\r\x0b\x0c"
  print("x per le incognite")
  a=input("Inserire proporzione: \n")
  if a.count(":")!=2:6/0
  if a.count("=")!=1:6/0
  findi=a.find(":")
  findii=a.find("=")
  findiii=a.find(":",findi+1)
  inum=a[0:findi]
  iinum=a[findi+1:findii]
  iiinum=a[findii+1:findiii]
  iiiinum=a[findiii+1:len(a)]
  for x in valid:
   if a.count(x)!=0:break
  b=inum+iinum+iiinum+iiiinum
  if b.count("x")==0 or b.count("X")==0:
   if int(inum)/int(iinum)==int(iiinum)/int(iiiinum):
    b="Proporzione Vera"
   else:b="Proporzione Falsa"
  elif inum==iiiinum:b=(str(int(iinum)*int(iiinum))**(1/2))
  elif iinum==iiinum:b=str((int(inum)*int(iiiinum))**(1/2))
  elif inum==iiinum or iinum==iiiinum: b="0.0"
  elif inum=="x" or inum=="X":b=str((int(iinum)*int(iiinum))/int(iiiinum))
  elif iinum=="x" or iinum=="X":b=str((int(inum)*int(iiiinum))/int(iiinum))
  elif iiinum=="x" or iiinum=="X":b=str((int(inum)*int(iiiinum))/int(iinum))
  elif iiiinum=="x" or iiiinum=="X":b=str((int(iinum)*int(iiinum))/int(inum))
 except ZeroDivisionError:b="Formato della proporzione errato"
 print(b)
 input()
while True:
 prop()