[英]Inserting a value in a list of lists
My data is as follows,我的数据如下,
data = [[2, 1, 2, 2], [2, 2, 1, 5], [1, 2, 2, 2], [2, 1, 2, 5], [2, 5, 2, 1]]
I would like to transform this such that there is a 0 at 0, 1, 2, 3 and 4th positions of the internal lists and get it look like below,我想对此进行转换,以便在内部列表的第 0、1、2、3 和第 4 个位置有一个 0,如下所示,
new_Data = [[0, 2, 1, 2, 2], [2, 0, 2, 1, 5], [1, 2, 0, 2, 2], [2, 1, 2, 0, 5], [2, 5, 2, 1, 0]]
I have tried using the following method,我尝试使用以下方法,
a = 0
for n in range(len(mRco1)-1):
mRco1[n][n] = [a]
But it does not seem to work.但这似乎不起作用。
Can anyone suggest how can I go about this?谁能建议我怎么能 go 关于这个?
Use the list.insert()
method使用list.insert()
方法
for i in range(len(data)):
data[i].insert(i, 0)
result:结果:
print(data)
>>> [[0, 2, 1, 2, 2], [2, 0, 2, 1, 5], [1, 2, 0, 2, 2], [2, 1, 2, 0, 5], [2, 5, 2, 1, 0]]
You'd like to iterate over the lists in data
, and for the n'th list, insert a 0
at position n
.您想要遍历data
中的列表,并且对于第 n 个列表,在 position n
处插入一个0
。 You can use the insert
function for that, and define the following loop:您可以为此使用insert
function,并定义以下循环:
for i in range(len(data)):
data[i].insert(i, 0)
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