Change String to Float Python-CodePudding

I would like to convert a list that I took out from a txt file into a float so I can make some calculous after in Python. I have the following list:

['1,0,1.2', '2,-1.5,1.2', '3,-1.5,0', '4,0,0', '5,1.5,1.2']

And I would like it to look like this:

[1,0,1.2,2,-1.5,1.2,3,-1.5,0,4,0,0,5,1.5,1.2]

All of them being float type.

Thank you in advance

CodePudding user response：

Two loops are needed here, an outer for the array and an inner loop over the spitted strings.

>>> new = [float(v) for inner in a for v in inner.split(",")]
>>> new
[1.0, 0.0, 1.2, 2.0, -1.5, 1.2, 3.0, -1.5, 0.0, 4.0, 0.0, 0.0, 5.0, 1.5, 1.2]

CodePudding user response：

You can do with map,

In [1]: l = ['1,0,1.2', '2,-1.5,1.2', '3,-1.5,0', '4,0,0', '5,1.5,1.2']

In [2]: list(map(float, ','.join(l).split(',')))
Out[2]: [1.0, 0.0, 1.2, 2.0, -1.5, 1.2, 3.0, -1.5, 0.0, 4.0, 0.0, 0.0, 5.0, 1.5, 1.2]