List Comprehension Version Of "extend"

Is there a 1-liner equivalent (using list comprehension) for the following: a = [] for i in range(6): a.extend(((-i,i,0,2),(-i-1,i,0,6))) a = tuple(a) I was thinking something

Solution 1:

You can use a nested list comprehension.

>>>[t for i inrange(6) for t in ((-i,i,0,2), (-i-1,i,0,6))]>>> 
[(0, 0, 0, 2),
 (-1, 0, 0, 6),
 (-1, 1, 0, 2),
 (-2, 1, 0, 6),
 (-2, 2, 0, 2),
 (-3, 2, 0, 6),
 (-3, 3, 0, 2),
 (-4, 3, 0, 6),
 (-4, 4, 0, 2),
 (-5, 4, 0, 6),
 (-5, 5, 0, 2),
 (-6, 5, 0, 6)]

It reads like this

[what I want (t) | forloopsasif writing non-listcomp code]

and is thus equivalent to

result = []
for i in range(6):
    for t in ((-i,i,0,2), (-i-1,i,0,6)):
        result.append(t)