How to remove substring from string in Python 3

Question

I am new to Python 3. Currently, I am working on a project that requires ne to go through a csv file (without using the csv modules) and extract numbers. While I have been able

Answer 1

Strings are immutable in Python, so you will need to always assign row[i] back to the modified version of itself:

for row in open(filename):
    row = row.split(",")
    for i in range(len(row) - 1):
        row[i] = row[i].replace("\n", "")  # CHANGE HERE
        row[i] = float(row[i])
    lines.append(row)

Note: You don't need to double escape the backslash in \n when using regular string replace.