How to parse several floats from one single string?-CodePudding

I have a list [' 2.5', ' -1.7 5.1', ' 0.0 -0.1 3.6']. I would like to be able to get the value -1.7 for instance, but if I split the string with the separator '.', I only get nonsense (as it should). Do you have any suggestions?

CodePudding user response：

split by space ! for example :

l = [' 2.5', ' -1.7 5.1', ' 0.0 -0.1 3.6']

print(l[1].split(' ')[0])

output:

-1.7

CodePudding user response：

You need to strip and split each element i in the list and then cast each of the resulting elements to float, i.e.,

values = [' 2.5', ' -1.7 5.1', ' 0.0 -0.1 3.6']

float_values = []

for i in values:
    for j in i.strip().split():
        float_values.append(float(j))

# [2.5, -1.7, 5.1, 0.0, -0.1, 3.6]
print(float_values)

or as a list comprehension:

float_values = [float(j) for i in values for j in i.strip().split()]