concat two or more ctables along the 0 axis.

ctable_append.py

def ctable_append(cts):
    """
    A function to append multiple ctables and clean up the disk entries along the 0 axis
    similar to pd.concat([df1, df2], axis=0)

    :param cts: a string containing the root directory path or a list of ctables
    :return: ctable
    """
    import shutil

    ctables = []
    first = True

    # check if we are getting a list or a root dir
    if type(cts) == str:
        cts = bcolz.walk(cts)

    for ct in cts:
        if first is True:
            ct1 = ct
        else:
            ct1.append(ct)
            shutil.rmtree(ct.rootdir)
        first = False

    return ct1