Weirdness comparing strings

[Mr.SpOOn]

Hi,
I have this piece of code:

class Note():
...
...
def has_the_same_name(self, note):
return self == note

def __str__(self):
return self.note_name + accidentals[self.accidentals]

__repr__ = __str__

if __name__ == '__main__':
n = Note('B')
n2 = Note('B')
print n
print n2
print n.has_the_same_name(n2)

I'd expect to get "True", because their string representation is
actually the same, instead the output is:

B
B
False

I think I'm missing something stupid. Where am I wrong?

[Scott David Daniels]

Mr.SpOOn wrote:

Hi,
I have this piece of code:

class Note():

Unless you _need_ old-style, use new style.

...
def has_the_same_name(self, note):
return self == note

Define equality (__eq__) if you want to compare for equality.

def __str__(self):
return self.note_name + accidentals[self.accidentals]

__repr__ = __str__

If str and repr are to be equal, just define repr.
class Note(object):
def __init__(self, note, accidentals):
self.note_name = note
self.accidentals = accidentals

def has_the_same_name(self, note):
return self == note

def __eq__(self, other):
return isinstance(other, Note) and (
self.note_name == other.note_name and
self.accidentals == other.accidentals)

def __repr__(self):
return self.note_name + accidentals[self.accidentals]
--Scott David Daniels
Sc***********@Acm.Org