i have a list of list with:
[['9.2','8.7'],['7.5','6.5']]
and i want to convert them into float values to get:
[[9.2,8.7],[7.5,6.5]]
I've tried this but it doesn't work.
L = [['9.2','8.7'],['7.5','6.5']]
for line in L:
if line:
line = [float(i) for i in line]
print(L)
You can use a nested list comprehension to write:
new_L = [[float(item) for item in line] for line in L]
You aren't changing the original but creating a new list, so you are not seeing any side effects in L. You can just create a new list with your code:
L = [['9.2','8.7'],['7.5','6.5']]
newL = []
for line in L:
newL.append([float(i) for i in line])
print(newL)
Alternatively, use a list comprehension:
newL = [[float(n) for n in e] for e in L]
