"str.contains(part)" or alternatives?

[Delaney, Timothy]

> From: Joseph A. Knapka [mailto:jknapka at earthlink.net]
>
> So in 2.3, can I do this and get the expected result?
> 
> >>> "" in "abc"
> 1

Yes - this has been hotly debated and defined as true.

> >>> for subst in "abc":
> ...   print subst
> ...
> <empty string>
> a
> ab
> abc
> b
> bc
> c

No. Iterating over a string is defined to return each single character in
turn. Remember:

    for subst in "abc":

is equivalent to

    for subst in iter("abc"):

and iter("abc") returns "a", "b", "c"

whilst

    if subst in "abc":

is equivalent to

    if "abc".__contains__(subst):

(falling back to if subst in iter("abc") if "abc" does not define
__contains__)

and str.__contains__ performs a substring match.

Tim Delaney