Split error while input string contained whitespace in tokenize function under lis.py

[klose911]

for example , just input "hello wolrd" after call repl()

"hello world" will be splitted to two tokens like ("hello) and (world"). it should be treated as one single string expression, not two tokens, otherwise "hello will be thought as an operator, but it can not be found from environment.

Below is my test log:

lis.py> "hello world"
Traceback (most recent call last):
File "", line 1, in
File "/home/klose/Documents/programming/python/intepreter/lis.py", line 98, in repl
val = eval(parse(raw_input(prompt)))
File "/home/klose/Documents/programming/python/intepreter/lis.py", line 123, in eval
return env.find(x)[x]
File "/home/klose/Documents/programming/python/intepreter/lis.py", line 89, in find
return self if (var in self) else self.outer.find(var)
AttributeError: 'NoneType' object has no attribute 'find'

[klose911]

Closed - this problem was fixed by lisp.py

[norvig]

@klose911 has it right -- lis.py does not support the string datatype, only symbols, lists, and numbers, so you shouldn't expect it to parse string literals. lispy.py does support strings.