Python How to convert file data into float data -


i'm trying convert data inside file read float numbers. large file. won't let me convert because says list. how fix this?:

    file = open(filename,'r')     line in file:         data = file.readlines()         line in data:                 numdata = float(data)     file.close() 

for line in data:     numdata = float(data)

that's problem is. you're calling float() on list data instead of on element line.

incidentally, seem looping twice on file when don't have to. declare file, iterate on it, , each iteration, you're rereading -- , iterating on again. should more this:

with open(filename, 'r') file:     line in file:         numdata = float(line)

of course, doubt mean set numdata (which should called num_data according pep8, iirc) every time. don't know it's meant used as, though, because variable name unclear, can't tell should instead. if it's list, mean this:

with open(filename, 'r') file:     line in file:         num_data.append(float(line))

note changed numdata num_data.


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