doc: make extract_content.py flake8 clean

# to fix the website and external links

import argparse

import errno

import filecmp

import fnmatch

import os

else:

    ZEPHYR_BUILD = None

def copy_if_different(src, dst):

    # Copies 'src' as 'dst', but only if dst does not exist or if itx contents

    # differ from src.This avoids unnecessary # timestamp updates, which

        return

    shutil.copyfile(src, dst)

def get_files(all, dest, dir):

    matches = []

    for root, dirnames, filenames in os.walk('%s/%s' % (ZEPHYR_BASE, dir)):

        if ZEPHYR_BUILD:

            if os.path.normpath(root).startswith(os.path.normpath(ZEPHYR_BUILD)):

            if os.path.normpath(root).startswith(

                    os.path.normpath(ZEPHYR_BUILD)):

                # Build folder, skip it

                continue

                        copy_if_different(src, dst)

                    except FileNotFoundError:

                        sys.stderr.write("File not found: %s\n  reference by %s\n" % (inf, file))

                        print("File not found:", inf, "\n  referenced by:",

                              file, file=sys.stderr)

        except UnicodeDecodeError as e:

            sys.stderr.write(

        f.close()

def main():

    parser = argparse.ArgumentParser(description='Recursively copy .rst files '

                                     'from the origin folder(s) to the '

                                     'destination folder, plus files referenced '

                                     'in those .rst files by a configurable '

                                     'list of directives: {}.'.format(DIRECTIVES))

    parser.add_argument('-a', '--all', action='store_true', help='Copy all files '

                        '(recursively) in the specified source folder(s).')

def main():

    parser = argparse.ArgumentParser(

        description='''Recursively copy .rst files from the origin folder(s) to

        the destination folder, plus files referenced in those .rst files by a

        configurable list of directives: {}.'''.format(DIRECTIVES))

    parser.add_argument('-a', '--all', action='store_true',

                        help='''Copy all files (recursively) in the specified

                        source folder(s).''')

    parser.add_argument('dest', nargs=1)

    parser.add_argument('src', nargs='+')

    args = parser.parse_args()

    for d in args.src:

        get_files(args.all, dest, d)

if __name__ == "__main__":

    main()