[英]How to divide list item by list item from another list using Python?
我想在兩個列表中划分列表項。
a = [[1, 0, 2], [0, 0, 0], [1], [1]]
b = [[5, 6, 4], [6, 6, 6], [3], [3]]
如何將a除以b來獲得此輸出:
c = [[0.2, 0, 0.5], [0, 0, 0], [0.333], [0.333]]
誰能幫我?
壓縮兩個列表並使用列表解析:
from __future__ import division # in python2 only
result = [[x/y for x,y in zip(xs, ys)] for xs, ys in zip(a, b)]
樣品運行:
In [1]: a = [[1, 0, 2], [0, 0, 0], [1], [1]]
...: b = [[5, 6, 4], [6, 6, 6], [3], [3]]
...:
In [2]: result = [[x/y for x,y in zip(xs, ys)] for xs, ys in zip(a, b)]
In [3]: result
Out[3]: [[0.2, 0.0, 0.5], [0.0, 0.0, 0.0], [0.3333333333333333], [0.3333333333333333]]
使用itertools.izip
(Python2.7):
import itertools
[[float(aaa) / bbb for (aaa, bbb) in itertools.izip(aa, bb)] \
for (aa, bb) in itertools.izip(a, b)]
from __future__ import division # for Python2
[[x / y for x, y in zip(*item)] for item in zip(a, b)]
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