True of False
Caseyweb at gmail.com
Thu Sep 27 18:58:44 CEST 2007
On Sep 27, 12:48 pm, "Simon Brunning" <si... at brunningonline.net>
> On 9/27/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
> > I tried writing a true and false If statement and didn't get
> > anything? I read some previous posts, but I must be missing
> > something. I just tried something easy:
> > a = ["a", "b", "c", "d", "e", "f"]
> > if "c" in a == True:
> > Print "Yes"
> > When I run this, it runs, but nothing prints. What am I doing wrong?
> Just use
> if "c" in a:
> and all will be well. The True object isn't the only truthy value in
> Python - see <http://docs.python.org/lib/truth.html>.
I would recommend the OP try this:
run the (I)python shell and try the following:
>>> a = [x for x in "abcdefg"]
>>> "c" in a
>>> "c" in a == True
>>> ("c" in a) == True
The reason your conditional failed is that it was interpreted as "c"
in (a == True) which is False.
the "==" operator binds at a higher precedence level than the "in"
operator, just as multiplication
binds higher than addition
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