range object

[nikosxatz]

1. Is range object a collection (container) or just a sequence?
2. Is range object a generator?
Thanks

[wavic]

Neither.

>>> obj = range(5)
>>> type(obj)
<class 'range'>
>>> 

It's a some kind of iterator.

---

I came across this months ago. You may find it interesting to read.

[buran]

>>> some_range = range(10)
>>> type(some_range)
<class 'range'>
>>> import collections.abc
>>> isinstance(some_range, collections.abc.Sequence)
True
>>> isinstance(some_range, collections.abc.Container)
True
>>> isinstance(some_range, collections.abc.Generator)
False
>>>

[DeaD_EyE]

The range object is very handy.

r = range(-100, 255, 2)

# you can reuse the range object
list(r) == list(r)
for i in r:
    for j in r:
        pass

# member testing is supported
42 in r
-100 in r

# Access an area
r[0:10] # > returns a new range object, which fit's to the selected area of the origin

# IndexAccess
r[1] # > returns the second element

# using built-in functions on range object
sum(r)
min(r)
max(r)

import math
import operator
from functools import reduce


math.factorial(10) == reduce(operator.mul, range(1,10+1))

Read the provided link posted by wavic.