python ３次元配列の作り方

１番目の方法
>>> a = [[] for i in xrange(5)]
>>> b = [a for i in xrange(90)]
>>> c = [b for i in xrange(981)]
>>> d = numpy.array(c)
>>> d
array([], shape=(981, 90, 5, 0), dtype=float64)

>>>d.shape

(981,90,5,0)

２番目の方法

a = numpy.zeros([981,90,5])

a.shape

(981, 90,5)

a[0][0] = ([1,2,3,4,5])

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