On Thu, Jul 14, 2011 at 12:06 AM, ArrC wrote:
So, i want to know what are the core diff btw PyPy and Python ?
Python is a language; PyPy is one implementation of that language. The
"classic" implementation of Python is CPython, not to be confused with
Cython; there are a few others as well. If you talk of "installing
Python", it probably means CPython.
And they also talked about the lack of type check in python.
So, how does it help (strongly typed) in debugging?
Sloppy but brief explanation: Python's variables are typeless; its
objects are strongly typed.
Longer explanation: Every piece of data in Python is an object.
Objects can be referenced by names; one object can have more than one
name pointing to it. Any name can point to any value, which is
somewhat the opposite of "strongly-typed variables" in other
languages. For instance:
a = "Hello" # a points to or "holds" a string
a = 234 # a now points to an integer
a = 1.0 # a now points to a float
a = [1,2,3] # a now has a list (array)
In debugging, all you generally care about is "what does this object
point to". I guess whether or not this makes things easier or harder
depends a lot on what sort of bugs you're tracking down.
Hope that helps!