Re: Short Python

your method is real good!

i have a method, although it's not small ,it also can slove the problem

Perimeter = X span + Y span + 2* (splitor nums in X and Y)

in one line , every time you split a line ,you got another two edge

```
Xmin, Xmax, Xspace=100, 0, 0
Ymin, Ymax, Yspace=100, 0, 0
for y in xrange(len(grid)):
s= ''
for x in xrange(len(grid[y])):
if grid[y][x] == 1:
if x<Xmin : Xmin = x
if x>Xmax : Xmax = x
if y<Ymin : Ymin = y
if y>Ymax : Ymax = y
s += '1'
else: s += ' '
if s.strip() == '': continue
Xspace = Xspace +len(s.split()) - 1
grid1=map(list, zip(*grid))
for x in xrange(len(grid1)):
s=''
for y in xrange(len(grid1[x])):
if grid1[x][y]== 1:
s += '1'
else: s += ' '
if s.strip() == '': continue
Yspace=Yspace + len(s.split()) - 1
return 2 * (Xmax - Xmin+1) + 2 * (Ymax - Ymin+1) + 2 * (Xspace + Yspace)
```