numpy

numpy.ndarray

• 2-dimensional array
• items can be fetched using the syntax a[i, j]
• arrays can be sliced with syntax a[m:n, k:l]
• FP:35 numpy.arange(n) build a numpy.ndarray object with numbers 0 to n-1 (FP:52) numpy.loadtxt(filename) load numbers stored in a text file (FP:53)