# Source code for pymatgen.util.sequence

    # coding: utf-8
    # Copyright (c) Pymatgen Development Team.
    # Distributed under the terms of the MIT License.

    """
    This module provides utilities to chunk large sequences and display progress
    bars during processing.
    """

    import math

    def get_chunks(sequence, size=1):
        """
        Args:
            sequence ():
            size ():

        Returns:

        """
        chunks = int(math.ceil(len(sequence) / float(size)))
        return [sequence[i * size:(i + 1) * size]
                for i in range(chunks)]

    class PBarSafe:
        """
        Progress bar.
        """

        def __init__(self, total):
            """
            Args:
                total (): Total value.
            """
            self.total = total
            self.done = 0
            self.report()

        def update(self, amount):
            """
            Update progress bar by amount.

            Args:
                amount (float):
            """
            self.done += amount
            self.report()

        def report(self):
            """
            Print progress.
            """
            print("{} of {} done {:.1%}".format(
                self.done, self.total, self.done / self.total))

    try:
        # noinspection PyUnresolvedReferences
        if get_ipython().__class__.__name__ == 'ZMQInteractiveShell':  # type: ignore
            from tqdm import tqdm_notebook as PBar
        else:  # likely 'TerminalInteractiveShell'
            from tqdm import tqdm as PBar
    except NameError:
        try:
            from tqdm import tqdm as PBar
        except ImportError:
            PBar = PBarSafe
    except ImportError:
        PBar = PBarSafe