EvilZone

Programming and Scripting => Scripting Languages => : Lionofgod May 04, 2012, 03:32:51 AM

: [Python] Weird Boolean Logic?
: Lionofgod May 04, 2012, 03:32:51 AM

Hello, we started a programming club at school and I was teaching a guy about dictionaries today and we came across something weird.

: (python)

>>> dict={'John':6,'Bob':3}
>>> if dict.has_key('Bob')==True:
print "hello"



hello
>>> 'Bob' in dict
True
>>> if 'Bob' in dict == True:
print "Bob is in the dictionary"



>>> WHY IT DOESNT SAY BOB IN DICTIONARY!!!!!
'Bob' in dict returns true, why doesnt it print 'Bob is in the
dictionary'
...Code formatting not very readable -.-

: Re: [Python] Weird Boolean Logic?
: Satan911 May 04, 2012, 05:44:51 AM

I'm not a python expert but the "== True" part looks useless.

This should work:

:

if dict.has_key('Bob') :
        print "Bob in dict"

And this should also work: (note the parentheses)

:

if ('Bob' in dict) == True:
        print "Bob is in the dictionary"

But really what I think you should use is:

:

if 'Bob' in dict :
        print "Bob is in the dictionary"


: Re: [Python] Weird Boolean Logic?
: Lionofgod May 04, 2012, 02:14:34 PM

Thank you, that worked out : )
Annd your right, the == part is useless, I just wanted to see if it could be used in this case :D