Timeseries and plotting refactored

"""

Timeseries operations

"""

from typing import Iterable

from datetime import datetime, timedelta

def contiguous_sequences(index: Iterable[datetime], interval: timedelta,

                        filter_min: int=1) -> Iterable[Iterable[datetime]]:

    """

    Breaks up a `DatetimeIndex` or a list of timestamps into a list of contiguous

    sequences.

    Parameters

    ----------

    index: Iterable[pd.datetime]

        An index/list of timestamps in chronoligical order,

    interval: pd.Timedelta

        A `Timedelta` object specifying the uniform intervals to determine

        contiguous indices.

    filter_min: int, optional

        Minimum size of subsequence to include in the result.

    Returns

    -------

    List[Iterable[pd.datetime]]

        A list of lists of `pd.datetime` objects.

    """

    indices = []

    j, k = 0, 1

    while k < len(index):           # for each subsequence

        seq = [index[j]]

        indices.append(seq)

        while k < len(index):       # for each element in subsequence

            diff = index[k] - index[j]

            if diff == interval:    # exact interval, add to subsequence

                seq.append(index[k])

                k += 1

                j += 1

            elif diff < interval:   # interval too small, look ahead

                k += 1

            else:                   # new subsequence

                j = k

                k += 1

                break

    return [i for i in indices if len(i) >= filter_min]

 No newline at end of file

from .surfaces import (

    plot_surface

)