lists with zero-valued elements

[Nick Forest]

Any body knows a trivial way to enumerate a list with n zero-valued elements?

 

[Skip Montanaro]

Nick> Any body knows a trivial way to enumerate a list with n
Nick> zero-valued elements?

I'm not sure what you're asking. I'd enumerate a list with n zero-valued
elements the same way I'd enumerate one with m zero-valued elements:

nelements = len(somelist)

If I wanted to count how many elements were zero, I might do something like:

nzeros = 0
for element in somelist:
if element == 0:
nzeros += 1

or more succinctly:

nzeros = len([element for element in somelist if element == 0])

Skip

 

[Alex Martelli]

Any body knows a trivial way to enumerate a list with n zero-valued
elements?

'enumerate'...? As in, enumerate(n*[0]) ... ?


Alex

 

[Alex Martelli]

Skip Montanaro wrote:
...

If I wanted to count how many elements were zero, I might do something
like:

nzeros = 0
for element in somelist:
if element == 0:
nzeros += 1

or more succinctly:

nzeros = len([element for element in somelist if element == 0])

I'd do somelist.count(0) -- faster, more direct, and even more succint.


Alex