Scientific notation[ENG].py

def nota():
 def void():
  print("\n"*1000)
 import string
 bol=True
 try:
  m=string.punctuation
  m=m.replace(".","")
  c="10"
  a=input("Insert the number: ")
  if a=="":
   import dlkjfg
  for kjkj in string.ascii_letters:
   if a.count(kjkj)!=0:
    6/0
  for kjkjk in m:
   if a.count(kjkjk)!=0:
    6/0
  if a.count(".")==0:
   a=a[:1]+"."+a[1:]
   b=a.find(".")
   d=(a[b+1:len(a)-1])
   for l in range(len(d)):
    c=c+"0"
   e=str(c.count("0"))
   print(a+" * 10^"+e)
  else:
   if a[0]!="." and a[0]!="0":
    print(a+" * 10^0")
    bol=False
   w=2
   q=a.find(".")
   if q==0:
    a="0"+a
   while True:
    if a[w]=="0":
     w=w+1
    else:
     break
   r=a[w:len(a)]
   t=len(a)-(len(r)-1)
   for ll in range(t):
    c=c+"0"
   u=str(c.count("0")-3)
   r=r[:1]+"."+r[1:]
   if bol:
    print(r+" * 10^-"+u)
  input("Enter to delete.")
  void()
 except ZeroDivisionError:
  input("You may not post lettere.Invio to Cancel.")
  void()
 except ImportError:
  input("Enter a number.")
  void()
while True:
 nota()