Read a package list from a given file path.

    Args:
      filepath: file path of the package list.

    Returns:
      a list of package names.

def load_requires_from_file(filepath):
    """Read a package list from a given file path.

    Args:
      filepath: file path of the package list.

    Returns:
      a list of package names.
    """
    with open(filepath) as fp:
        return [pkg_name.strip() for pkg_name in fp.readlines()]