list subsetting

culpritNr1 ig2ar-saf1 at yahoo.co.uk
Wed Jan 21 22:53:15 CET 2009


Hello All,

Say I have a list like this:

a = [0 , 1, 3.14, 20, 8, 8, 3.14]

Is there a simple python way to count the number of 3.14's in the list in
one statement?

In R I do like this

a = c(0 , 1, 3.14, 20, 8, 8, 3.14)

length( a[ a[]==3.14 ] )

How do I do that in standard python?

(Note that this is just an example, I do not mean to use == in floating
point operations.)

Thank you

culpritNr1

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