Adding option to perform run from a specified directory.

from numbers import Integral

from pathlib import Path

import os

import subprocess

import pygriffin.checkvalue as cv

        self.n_procs = n_procs

        self.n_threads = n_threads

    def run(self):

    def run(self, cwd=None):

        """

        Execute Griffin

        Parameters

        ----------

        cwd : str or Path

            Directory from which to run Griffin

        Returns

        -------

        int

        if self.n_threads > 1:

            cmd.append('--n-threads={}'.format(self.n_threads))

        p = subprocess.Popen(cmd, universal_newlines=True)

        cwd = Path(cwd)

        if not cwd.is_dir():

            msg = ("Specified working directory "

            "doesn't exist: {}".format(cwd))

            raise ValueError(msg)

        p = subprocess.Popen(cmd, universal_newlines=True, cwd=str(cwd))

        return p.wait()

    def __call__(self):

        return self.run()

    def __call__(self, cwd=None):

        return self.run(cwd)

    @property

    def input(self):