itertools: product

Question

I made it pass the question in python lesson on itertools but while learning but i am curious to how it reached the conclusion of “6”, I don’t want to continue the lesson until is grasp this.

from itertools import product
a={1, 2}
print(len(list(product(range(3), a))) #what does list mean in this line?

It is said the ‘product’ is used to make possible combinations but how did reach 6? Can anyone shine some light on this question? Thanks

Answer 1

Click run and see combinations, len just counting them.
https://code.sololearn.com/cANRNjct1Nz7/?ref=app

Answer 2

You just create list [a, b, c, ...] with all combinations of {1,2} and [0,1,2].
[0,1,2] is result of range(3).

Answer 3

Try to remember how we created quadratic equations by manually squaring x+y to get x^2+xy+yx+y^2.
its simply x(x+y)+y(x+y)
in our case we have set a as {1,2} and another iterable created by range(3) which is [0,1,2]
the product ideally becomes 1×(0,1,2) + 2(0,1,2). so you get (1,0),(1,1),(1,2) and (2,0),(2,1),(2,2). and those are six tuples

Answer 4

6

Answer 5

Alrighty, so the code is building a list of the different combinations of "a" (1,2) the range is 3 which will give you the following list (0,1)(1,1)(2,1)(0,2)(1,2)(2,2).

If you run print(list(product(range(3), a))) #that's without "len" it will print out that list. So if you count the number of listed items the answer is 6.

Answer 6

Hubert Dudek ,Thank you! you beautiful person

I didn't take the len into account when thinking this... thank you again

Answer 7

Thanks to Babeetha

Answer 8

[0,2]wha??
I get what you were trying to say about the combinations but...

the output is 6... how excatly did it reach it?

Answer 9

What is the output of this code?
from itertools import product
a={1, 2}
print(len(list(product(range(3), a))))

output:6

Answer 10

The ans is 6

Answer 11

What is the output of this code?

from itertools import product
a={1, 2}
print(len(list(product(range(3), a))))

[(0, 1),
(0, 2),
(1, 1),
(1, 2),
(2, 1)
, (2, 2)] #there are 6 possible value

# range(3) represent (0,1,2)

Answer 12

from itertools import permutation
items=['x','y']
result=list(permutations(items))
print(result)

Answer 13

RESULT ---------------> 6

Answer 14

6

Answer 15

6

Answer 16

question : What is the output of this code?
program : from itertools import product
a={1, 2}
print(len(list(product(range(3), a))))
output : 6

Answer 17

6 is the answer

Answer 18

Ans 6