PythonQ 240-8XX Manual do Utilizador descarregar pdf (Página 18)

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Loops over arrays (1)

Standard loop over each element:

for i in xrange(a.shape[0]):

for j in xrange(a.shape[1]):

a[i,j] = (i+1)

*

(j+1)

*

(j+2)

print ’a[%d,%d]=%g ’ % (i,j,a[i,j]),

print # newline after each row

Astandardforloopiteratesovertheﬁrstindex:

>>> print a

[[ 2. 6. 12.]

[4.12.24.]]

>>> for e in a:

... print e

...

[2. 6.12.]

[4.12.24.]

Numerical Python – p. 252/728

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