oneday - 7 months ago 16

Python Question

I have below list of list called mylist and I want to take first element from each list and create a tuple. I want to do this for all n elements from list of list.

`mylist = [[1,2,3], ['a', 'b', 'c'], [5, 8, 10], [100, 200, 30]]`

convert to

`mytuple = ((1,'a', 5, 100) ,(2,'b', 8, 200), (3,'c',10, 30))`

I have managed to do it with below steps and I am sure there is better way :)

`i = 0;`

while(i < n):

templist = (x[i] for x in mylist)

newlist.append(tuple(templist))

i += 1

ftuple = tuple(newlist)

I have seen this link but haven't been able to find easier way looking at it

SOlink1 Solink2

Answer

`zip`

is what you need:

```
>>> mylist = [[1,2,3], ['a', 'b', 'c'], [5, 8, 10], [100, 200, 30]]
>>> zip(*mylist) # In Python 3.x, this returns an iterator instead of a list
[(1, 'a', 5, 100), (2, 'b', 8, 200), (3, 'c', 10, 30)]
>>> tuple(zip(*mylist))
((1, 'a', 5, 100), (2, 'b', 8, 200), (3, 'c', 10, 30))
```