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#!/usr/bin/env python
# -*- coding: utf-8 -*-

def slice_it(my_list, columns=2):
    """slice_it(my_list, columns=2): Gibt eine Liste, die `columns` Listen
    enthält zurück. Jede dieser Listen repräsentiert eine Spalte, wie sie
    in Zeitungen/Wörterbüchern zu finden sind.
    >>> slice_it(range(10))
    [[0, 1, 2, 3, 4], [5, 6, 7, 8, 9]]
    >>> slice_it(range(10),3)
    [[0, 1, 2, 3], [4, 5, 6], [7, 8, 9]]
    >>> slice_it(range(10),4)
    [[0, 1, 2], [3, 4, 5], [6, 7], [8, 9]]
    """
    length = len(my_list)
    mod = length % columns
    step = length/columns
    pos = 0
    new_list = []
    i = 0
    while i < columns:
        if mod != 0:
            new_pos = pos+step+1
            new_list.append(my_list[pos:new_pos])
            pos = new_pos
            mod -= 1
        else:
            new_pos = pos+step
            new_list.append(my_list[pos:new_pos])
            pos = new_pos
        i += 1
    return new_list

if __name__ == "__main__":
    import doctest
    doctest.testmod()
    print "Tests done."

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def slice_it(li, cols=2):
	lengths = [len(li[i::cols]) for i in range(cols)]
	return [li[sum(lengths[:i]):sum(lengths[:i])+lengths[i]] for i in range(cols)]

Code: Alles auswählen

def slice_it(li, cols=2):
	lengths = [len(li[i::cols]) for i in range(cols)]
	result = []
	for i in range(cols):
		start = sum(lengths[:i])
		stop = start + lengths[i]
		result.append(li[start:stop])
	return result

Code: Alles auswählen

def slice_it(li, cols=2):
	lengths = [len(li[i::cols]) for i in range(cols)]
	for i in range(cols):
		start = sum(lengths[:i])
		stop = start + lengths[i]
		yield li[start:stop]

Code: Alles auswählen

def slice_it(li, cols=2): 
    start = 0
    for i in range(cols): 
        stop = start + len(li[i::cols])
        yield li[start:stop]
        start = stop

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def group(iterable, num):
    """Group an iterable into an n-tuples iterable. Incomplete tuples
    are discarded e.g.
    
    >>> list(group(range(10), 3))
    [(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, None, None)]
    """
    return map(None, *[iter(iterable)] * num)

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for i in range(1000000):
     print i