[Python] Weird Boolean Logic?

[Lionofgod]

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

Code: (python) [Select]

>>> 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 -.-

[Satan911]

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

This should work:

Code: [Select]

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

And this should also work: (note the parentheses)

Code: [Select]

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

But really what I think you should use is:

Code: [Select]

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


[Lionofgod]

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