[Tutor] eval func with floating...

[Peter Otten]

simulacrx wrote:

> check=(1,2,3,4,5,6,7,8,9,"/","*","-","+","(",")","[","]")

You have to quote the digits: 1 is an integer while "1" is a string of 
length one: 

>>> "1" == 1
False

Also, you forgot the "0". 
Note that there's no need to use a tuple as set() will happily accept a 
string:

check = set("0123456789/*-+,()")
 
> while True:
>      a=raw_input("type your query : \n")
>      c=set(a).intersection(set(check))
> 
>      if c:
>          print *eval("float(%s)"%a)*
>      else:
>          print "error! please use -defined operators-!"
> -----------------------------
> 
> this script works.. but if i type
> 
> 15/8
> 
> it returns 1.. no floatin'.. i must fix this? can anyone help me?