Remove __future__ imports from Python files

remove-future-imports.py

import sys

files = sys.argv[1:]
for path in files:
    print(f"Updating {path}")

    out_lines = []

    prev_line_was_future_import = False
    with open(path) as file:
        for line in file:

            is_future_import = line.startswith("from __future__")
            if not is_future_import and (not prev_line_was_future_import or line.strip() != ""):
                out_lines.append(line)

            prev_line_was_future_import = is_future_import

    file = open(path, "w")
    file.write("".join(out_lines))
    file.close()

This script removes __future__ imports from Python files. It improves over running 2to3 by removing the lines rather than just replacing them with blank lines and it also removes any trailing new lines that separated them from the next comment or block of code.