PythonQ 240-8XX Manuel d'utilisateur télécharger pdf (Page 19)

! www.simula.no/˜hpl

Loops over arrays (2)

View array as one-dimensional and iterate over all elements:

for e in a.ravel():

print e

Use ravel() only when reading elements, for assigning it is better

to use shape or reshape ﬁrst!

For loop over all index tuples and values:

>>> for index, value in ndenumerate(a):

... print index, value

...

(0, 0) 2.0

(0, 1) 6.0

(0, 2) 12.0

(1, 0) 4.0

(1, 1) 12.0

(1, 2) 24.0

Numerical Python – p. 253/728

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 36 37

Pas de commentaire

PythonQ 240-8XX Manuel d'utilisateur Page 19