FilesExpand file tree

 master

/

iterator.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

28 lines (20 loc) · 771 Bytes

 master

/

iterator.py

Copy path

Top

File metadata and controls

• Code
• Blame

28 lines (20 loc) · 771 Bytes

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

"""http://ginstrom.com/scribbles/2007/10/08/design-patterns-python-style/

Implementation of the iterator pattern with a generator"""

def count_to(count):

"""Counts by word numbers, up to a maximum of five"""

numbers = ["one", "two", "three", "four", "five"]

# enumerate() returns a tuple containing a count (from start which

# defaults to 0) and the values obtained from iterating over sequence

for pos, number in zip(range(count), numbers):

yield number

# Test the generator

count_to_two = lambda: count_to(2)

count_to_five = lambda: count_to(5)

print('Counting to two...')

for number in count_to_two():

print(number, end=' ')

print()

print('Counting to five...')

for number in count_to_five():

print(number, end=' ')

print()