new_contents: st="234"
  
  print(st,"->isnum: ",st.isalnum())
  
  st="Aeiou"
  print(st,"->isallalph: ",st.isalpha())
  
  st="312"
  print(st,"->chek decimle:",st.isdecimal())
  print(st,"->check digit:",st.isdigit())
  
  st="AEIou"
  print(st,"->check lower:",st.islower())
  
  print(st,"->check upper:",st.isupper())
  st="23heloo"
  print(st,"->check numeric:",st.isnumeric())
  
subject: Create 9string_stringCheck.py