On 09/26/12 17:28, 88888 Dihedral wrote:

> 88888 Dihedral於 2012年9月27日星期四UTC+8上午6時07分35秒 寫道：

>>>> In these conditions, how to make this list [[0,0,0],[0,0,0]] with "*"

>>>> without this behavior?

>>> >>> a = [[0]*3 for i in xrange(2)]

>>> >>> a[0][0]=2

>>> >>> a

>>> [[2, 0, 0], [0, 0, 0]]

>

> def zeros(m,n):

> a=[]

> for i in xrange(m):

> a.append([0]*n)

> return a

>

> If one wants to tranlate to C, this is the style.
But this is Python, so why the heck would anybody want to emulate

*C* style? It could also be written in an assembly-language style,

COBOL style, or a Fortran style...none of which are particularly

valuable.

Besides, a C-style would allocate a single array of M*N slots and

then calculate 2d offsets into that single array.

-tkc