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Unpack 2d list of tuples

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1

I am trying to unpack a 2D list of tuples. Everything I have tried so far is not giving me the results

This is what I am trying to achieve:

Input: [[(-8, -8), (2, 0)], [(0, 2), (-1, -1)]] 

Output = [[-8, 2], [0, -1]], [[-8, 0], [2, -1]]

I have tried zip like this but it does not work.

a,b = zip(*matrixRow)

python list tuples

share|improve this question

edited Mar 25 at 20:03

Pavan Chandaka

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asked Mar 25 at 20:01

Firzok NadeemFirzok Nadeem

833 bronze badges

add a comment | 

1

I am trying to unpack a 2D list of tuples. Everything I have tried so far is not giving me the results

This is what I am trying to achieve:

Input: [[(-8, -8), (2, 0)], [(0, 2), (-1, -1)]] 

Output = [[-8, 2], [0, -1]], [[-8, 0], [2, -1]]

I have tried zip like this but it does not work.

a,b = zip(*matrixRow)

python list tuples

share|improve this question

edited Mar 25 at 20:03

Pavan Chandaka

5,73233 gold badges1111 silver badges2020 bronze badges

asked Mar 25 at 20:01

Firzok NadeemFirzok Nadeem

833 bronze badges

add a comment | 

I am trying to unpack a 2D list of tuples. Everything I have tried so far is not giving me the results

This is what I am trying to achieve:

Input: [[(-8, -8), (2, 0)], [(0, 2), (-1, -1)]] 

Output = [[-8, 2], [0, -1]], [[-8, 0], [2, -1]]

I have tried zip like this but it does not work.

a,b = zip(*matrixRow)

python list tuples

share|improve this question

edited Mar 25 at 20:03

Pavan Chandaka

5,73233 gold badges1111 silver badges2020 bronze badges

asked Mar 25 at 20:01

Firzok NadeemFirzok Nadeem

833 bronze badges

Input: [[(-8, -8), (2, 0)], [(0, 2), (-1, -1)]] 

Output = [[-8, 2], [0, -1]], [[-8, 0], [2, -1]]

a,b = zip(*matrixRow)

share|improve this question

edited Mar 25 at 20:03

Pavan Chandaka

5,73233 gold badges1111 silver badges2020 bronze badges

asked Mar 25 at 20:01

Firzok NadeemFirzok Nadeem

833 bronze badges

share|improve this question

edited Mar 25 at 20:03

Pavan Chandaka

5,73233 gold badges1111 silver badges2020 bronze badges

asked Mar 25 at 20:01

Firzok NadeemFirzok Nadeem

833 bronze badges

edited Mar 25 at 20:03

Pavan Chandaka

5,73233 gold badges1111 silver badges2020 bronze badges

edited Mar 25 at 20:03

Pavan Chandaka

5,73233 gold badges1111 silver badges2020 bronze badges

asked Mar 25 at 20:01

Firzok NadeemFirzok Nadeem

833 bronze badges

asked Mar 25 at 20:01

Firzok NadeemFirzok Nadeem

833 bronze badges

1 Answer
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1

you need to apply zip twice to perform 2 transpositions:

inlist = [[(-8, -8), (2, 0)], [(0, 2), (-1, -1)]]

print(list(zip(*(zip(*x) for x in inlist))))

result:

[((-8, 2), (0, -1)), ((-8, 0), (2, -1))]

this gives tuples inside because zip creates them. To get lists, it's a little more complicated because you have to convert to list at 2 levels:

print([[list(z) for z in y] for y in zip(*(zip(*x) for x in inlist))])

prints:

[[[-8, 2], [0, -1]], [[-8, 0], [2, -1]]]

share|improve this answer

edited Mar 25 at 20:16

answered Mar 25 at 20:08

Jean-François Fabre♦Jean-François Fabre

109k1010 gold badges6868 silver badges123123 bronze badges

add a comment | 

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1

you need to apply zip twice to perform 2 transpositions:

inlist = [[(-8, -8), (2, 0)], [(0, 2), (-1, -1)]]

print(list(zip(*(zip(*x) for x in inlist))))

result:

[((-8, 2), (0, -1)), ((-8, 0), (2, -1))]

this gives tuples inside because zip creates them. To get lists, it's a little more complicated because you have to convert to list at 2 levels:

print([[list(z) for z in y] for y in zip(*(zip(*x) for x in inlist))])

prints:

[[[-8, 2], [0, -1]], [[-8, 0], [2, -1]]]

share|improve this answer

edited Mar 25 at 20:16

answered Mar 25 at 20:08

Jean-François Fabre♦Jean-François Fabre

109k1010 gold badges6868 silver badges123123 bronze badges

add a comment | 

1

you need to apply zip twice to perform 2 transpositions:

inlist = [[(-8, -8), (2, 0)], [(0, 2), (-1, -1)]]

print(list(zip(*(zip(*x) for x in inlist))))

result:

[((-8, 2), (0, -1)), ((-8, 0), (2, -1))]

this gives tuples inside because zip creates them. To get lists, it's a little more complicated because you have to convert to list at 2 levels:

print([[list(z) for z in y] for y in zip(*(zip(*x) for x in inlist))])

prints:

[[[-8, 2], [0, -1]], [[-8, 0], [2, -1]]]

share|improve this answer

edited Mar 25 at 20:16

answered Mar 25 at 20:08

Jean-François Fabre♦Jean-François Fabre

109k1010 gold badges6868 silver badges123123 bronze badges

add a comment | 

you need to apply zip twice to perform 2 transpositions:

inlist = [[(-8, -8), (2, 0)], [(0, 2), (-1, -1)]]

print(list(zip(*(zip(*x) for x in inlist))))

result:

[((-8, 2), (0, -1)), ((-8, 0), (2, -1))]

this gives tuples inside because zip creates them. To get lists, it's a little more complicated because you have to convert to list at 2 levels:

print([[list(z) for z in y] for y in zip(*(zip(*x) for x in inlist))])

prints:

[[[-8, 2], [0, -1]], [[-8, 0], [2, -1]]]

share|improve this answer

edited Mar 25 at 20:16

answered Mar 25 at 20:08

Jean-François Fabre♦Jean-François Fabre

109k1010 gold badges6868 silver badges123123 bronze badges

inlist = [[(-8, -8), (2, 0)], [(0, 2), (-1, -1)]]

print(list(zip(*(zip(*x) for x in inlist))))

[((-8, 2), (0, -1)), ((-8, 0), (2, -1))]

print([[list(z) for z in y] for y in zip(*(zip(*x) for x in inlist))])

[[[-8, 2], [0, -1]], [[-8, 0], [2, -1]]]

share|improve this answer

edited Mar 25 at 20:16

answered Mar 25 at 20:08

Jean-François Fabre♦Jean-François Fabre

109k1010 gold badges6868 silver badges123123 bronze badges

answered Mar 25 at 20:08

Jean-François Fabre♦Jean-François Fabre

109k1010 gold badges6868 silver badges123123 bronze badges

answered Mar 25 at 20:08

Jean-François Fabre♦Jean-François Fabre

109k1010 gold badges6868 silver badges123123 bronze badges