python simple auxiliary functions

cat_vector.py

def cat_vector(args):
    noArray = False
    for y in args:
        if isinstance(y, np.ndarray):
            if y.size != 1:
                x = y
                noArray = True
                break
    if noArray == False:
        raise 'One of the args has to be a numpy array'
    try:
        r, c = x.shape
    except (ValueError, AttributeError):
        r = 0
        c = 0 #Just use hstack
    if r > 1 and c == 1:
        return np.vstack(args)
    else:
        return np.hstack(args)

import_rel.py

def import_rel(rel, module_name = None):
    import sys
    import os
    path_string = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
    if not sys.path.__contains__(path_string):
        sys.path.append(path_string)
    if module_name is not None:
        __import__(module_name)