Key Word(s): Generators, Heaps
Exercise 1¶
Do the following exercise in a .py file called sentence.py.¶
Create a Sentence iterator class that uses a generator.
Notes and Hints:
- You will write the generator in the
__iter__special method. - The generator automatically gets
__next__(no need to implement it). - Now you only need to create a single class.
Here is a sample SentenceIterator class that can be used to iterate over a Sentence:
class SentenceIterator:
def __init__(self, words):
self.words = words
self.index = 0
def __next__(self):
try:
word = self.words[self.index]
except IndexError:
raise StopIteration()
self.index += 1
return word
def __iter__(self):
return self
class Sentence: # An iterable
def __init__(self, text):
self.text = text
self.words = text.split()
def __iter__(self):
return SentenceIterator(self.words)
def __repr__(self):
return 'Sentence(%s)' % reprlib.repr(self.text)
Deliverables¶
sentence.py