Merge htm files with shutil library (TypeError: 'module' object is not callable)

[DeaD_EyE]

If you run the program twice, then also the content of "ouput_file.htm" is included to "output_file.htm", but "output_file.htm" gets new content, because the output is read and written from the same file. I tried this on a NVMe and file size was growing very fast. I deleted afterward 4 GiB data because of this silly mistake.

Example with Path objects

from pathlib import Path
from shutil import copyfileobj


def merge(path: str|Path, glob: str, output: str|Path, show:bool=False) -> None:
    """
    Merge files found in path by glob pattern.
    All data is written to output.

    Args:
        path (str | Path): Path to find files
        glob (str): glob pattern to find files in path
        output (str | Path): Output file
        show (bool, optional): Print processed file. Defaults to False.
    """
    # Ensure that output is a Path object
    output = Path(output)
    
    # excluding output file from the list of files
    files = [file for file in Path(path).glob(glob) if file != output]
    
    # keep in mind, that the order of files is not given
    # sorting files by modification time
    # but I guess it's not what you want
    files.sort(key=lambda file: file.stat().st_mtime)

    if not files:
        return

    with open(output, "wb") as fd_out:
        for file in files:
            if show:
                print(f"Processing {file}")

            with file.open("rb") as fd_in:
                copyfileobj(fd_in, fd_out)


merge(".", "*.txt", "output_file.txt", show=True)