How to delete empty lines from a .txt file [duplicate]

Question

I have a huge input .txt file of this form:

0 1 0 1 0 0 0 0 0 0

0 1 0 1 0 0 0 0 0 0

0 1 0 1 0 0 0 0 0 0

and I want to delete all empty lines in order to create a new output .txt file like this:

0 1 0 1 0 0 0 0 0 0
0 1 0 1 0 0 0 0 0 0
0 1 0 1 0 0 0 0 0 0

I tried doing it with grep:

grep -v '^$' test1.txt > test2.txt 

but I get "SyntaxError: invalid syntax"

When I do it with pandas as someone suggests, I get different number of columns and some integers are converted into floats: e.g.: 1.0 instead of 1

When I do it as inspectorG4dget suggests (see below), it works nice, with only 1 problem: the last line is not printed completely:

with open('path/to/file') as infile, open('output.txt', 'w') as outfile:
    for line in infile:
        if not line.strip(): continue  # skip the empty line
        outfile.write(line)  # non-empty line. Write it to output

It must be something with my file then...

I've already addressed similar posts like these below (and others), but they are not working in my case, mainly due to the reasons explained above

How to delete all blank lines in the file with the help of python?

one liner for removing blank lines from a file in python?

Answer 1

This is how I would do it:

with open('path/to/file') as infile, open('output.txt', 'w') as outfile:
    for line in infile:
        if not line.strip(): continue  # skip the empty line
        outfile.write(line)  # non-empty line. Write it to output