I went through examples of function factories, but I still cannot understand something... I have a class Sample. For objects instantiated from that class, I have an attribute: a function f telling me different words (e.g. 'one' or 'two'). To do so, I create a Factory, where I define f for each sample. All samples are stored in SampleCollection class. Then, I call function f for each sample from the collection. I cannot understand why the output 'two' and 'two', and not 'one' and 'two' as I would expect...
class Sample():
def __init__(self):
self.f = None
def call_f(self):
print self.f()
class SampleCollection():
def __init__(self):
self.container = []
def add(self, sample):
self.container.append(sample)
class Factory():
def __init__(self, collection):
self.collection = collection
def generate_f(self, words):
for w in words:
def f(): return w
s = Sample()
s.f = f
self.collection.add(s)
col = SampleCollection()
fab = Factory(col)
words = ['one', 'two']
fab.generate_f(words)
for s in col.container:
s.call_f()
UPD: Thank you for your answers! I didn't know how it is called correctly. Example solution is to change the function definition: def f(w=w): return w.
