Unpack tuples from list of tuples-CodePudding

I would like to unpack the variables from a list of list of tuples. I have made some attempts but could not reach a solution.

Here is a list of points. I would like to unpack each variable inside p1, p2, p3, p4 during each iteration of the sublists so that during each iteration each variable gets assigned.

For example in the first iteration, I would expect:

p1=(0,0)
p2=(1,0)
p3=(2,0)
p4=(0,1)

In the next iteration:

p1=(0,0)
p2=(1,0)
p3=(2,0)
p4=(2,1)

points=[[(0, 0), (1, 0), (2, 0), (0, 1)],[(0, 0), (1, 0), (2, 0), (2, 1)]]
        
for i in points:
    for j in i:
         p1=j[0],j[1]
         p2=j[0],j[1]
         p3=j[0],j[1]
         p4=j[0],j[1]

CodePudding user response：

Each element of points is a list of tuples that can be unpacked, like so:

for p1, p2, p3, p4 in points:
    print(p1, p2, p3, p4)

This outputs:

(0, 0) (1, 0) (2, 0) (0, 1)
(0, 0) (1, 0) (2, 0) (2, 1)

CodePudding user response：

I corrected sub to points and I fixed the index that was out of bounds when unpacking p2.

points=[[(0, 0), (1, 0), (2, 0), (0, 1)],[(0, 0), (1, 0), (2, 0), (2, 1)]]
        
for i in points:
    for j in i:
         p1=j[0],j[1]
         p2=j[0],j[1]
         p3=j[0],j[1]
         p4=j[0],j[1]
        
        
    print (p1,p2,p3,p4)