test=[]

def tst(func):
    global test
    test+=[[func, func.__name__]]
    return func

@tst
def convert_for1(data):
    output = []
    for line in data:
        x,y = line.split(',')
        output+=[[float(x),float(y)]]
    return output

@tst
def convert_for2(data):
    output = []
    for line in data:
        x,y = line.split(',')
        output.append([float(x),float(y)])
    return output

@tst
def convert_map(data):
    return [list(map(float, x.split(','))) for x in data]

@tst
def convert_map2(data):
    return [[i for i in map(float,x.split(','))] for x in data]

@tst
def convert_map3(data):
    return [map(float, x.split(',')) for x in data]

@tst
def convert_map4(data):
    return map(lambda line:map(float, line.split(',')), data)

@tst
def convert_map5(data):
    return [[j for j in i] for i in map(lambda line:map(float, line.split(',')), data)]

@tst
def convert_compr(data):
    return [[float(i), float(j)] for i,j in [k.split(',') for k in data]]

@tst
def convert_gener(data):
    return [[float(i), float(j)] for i,j in (k.split(',') for k in data)]

@tst
def convert_list_comprehension(data):
    """This is the same as convert_map, just faster and more readable"""
    return [[float(y) for y in x.split(',')] for x in data]

text = """ 1,2
           2,3
           3,4
           5,6
           7,8"""
data = text.splitlines()
data = ['0.1, 0.3', '0.4, 0.5', '0.7, 0.8', '0.3, 0.9', '0.9, 0.4', '1.0, 0.9', '0.0, 0.5', '0.1, 0.8', '0.9, 0.8', '0.8, 0.6']

result=convert_for1(data)
print(result)
for i in test:
    print(i[1], i[0](data)==result)

import markdown
class MD(str):
    def _repr_html_(self):
        return markdown.markdown(self)

for i in test:
    print(i[1])
    %timeit i[0](data)