def count(iterable):
    n = 0
    for item in iterable:
        n += 1
    return n
.. todo::
dataset/ETHPy150Open mediawiki-utilities/python-mediawiki-utilities/mw/util/iteration/count.py/count--crossover with--dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/distributions/mnd.py/AdditiveDiagonalMND.is_symmetric