使用python在2D列表中搜索以找到x，y位置 [英] Search in 2D list using python to find x,y position

问题描述

我有2D列表，我需要搜索元素的索引.在我刚开始编程时，我使用了以下功能:

I have 2D list and I need to search for the index of an element. As I am begineer to programming I used the following function:

def in_list(c):
    for i in xrange(0,no_classes):
        if c in classes[i]:
            return i;

    return -1

这里的类是2D列表，no_classes表示类的数量，即列表的第1个维度.当c不在araray中时，返回-1.我可以优化搜索吗?

Here classes is a 2D list and no_classes denotes the number of classes i.e the 1st dimesntion of the list. -1 is returned when c is not in the araray. Is there any I can optimize the search?

推荐答案

您不需要自己定义no_classes.使用enumerate():

You don't need to define no_classes yourself. Use enumerate():

def in_list(c, classes):
    for i, sublist in enumerate(classes):
        if c in sublist:
            return i
    return -1

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