如何找到两点之间的距离？

Let's say I have x1, y1 and also x2, y2.

假设我有x1，y1以及x2，y2。

How can I find the distance between them? It's a simple math function, but is there a snippet of this online?

我怎样才能找到它们之间的距离？这是一个简单的数学函数，但是有一个在线的片段吗？

3 个解决方案

#1

dist = sqrt( (x2 - x1)**2 + (y2 - y1)**2 )

As others have pointed out, you can also use the equivalent built-in math.hypot():

正如其他人指出的那样，你也可以使用等效的内置math.hypot（）：

dist = math.hypot(x2 - x1, y2 - y1)

#2

Let's not forget math.hypot:

我们不要忘记math.hypot：

dist = math.hypot(x2-x1, y2-y1)

Here's hypot as part of a snippet to compute the length of a path defined by a list of x,y tuples:

这是作为计算由x，y元组列表定义的路径长度的片段的一部分的hypot：

from math import hypot

pts = [
    (10,10),
    (10,11),
    (20,11),
    (20,10),
    (10,10),
    ]

ptdiff = lambda (p1,p2): (p1[0]-p2[0], p1[1]-p2[1])
diffs = map(ptdiff, zip(pts,pts[1:]))
path = sum(hypot(*d) for d in  diffs)
print path

#3

如何找到两点之间的距离？ It is an implementation of Pythagorean theorem. Link: http://en.wikipedia.org/wiki/Pythagorean_theorem

它是毕达哥拉斯定理的一个实现。链接：http：//en.wikipedia.org/wiki/Pythagorean_theorem

#1

dist = sqrt( (x2 - x1)**2 + (y2 - y1)**2 )