INNER CODE UNIT · Python

_line_by_line_replace

webartifex/intro-to-python · noxfile.py:132

def _line_by_line_replace(path):
    """Replace/change the lines in a file one by one.

    This generator function yields two file handles, one to the current file
    (i.e., `old_file`) and one to its replacement (i.e., `new_file`).

    Usage: loop over the lines in `old_file` and write the files to be kept
    to `new_file`. Files not written to `new_file` are removed!

    Args:
        path: the file whose lines are to be replaced

    Yields:
        old_file, new_file: handles to a file and its replacement
    """
    file_handle, new_file_path = tempfile.mkstemp()
    with os.fdopen(file_handle, "w") as new_file:
        with open(path) as old_file:

View source record →