(conds)
return wc1
[ [wc, wo, wv],
      [wc, wo, wv], ...
    ]
[ [wc, wo, wv],
      [wc, wo, wv], ...
    ]
[ [ wc wo wv ] [ wc wo wv ] ... ]
def get_wc1(conds):
    """
    [ [wc, wo, wv],
      [wc, wo, wv], ...
    ]
    """
    wc1 = []
    for cond in conds:
        wc1.append(cond[0])
    return wc1
def get_wc1 ( conds ) : wc1 = [ ] for cond in conds : wc1 . append ( cond [ 0 ] ) return wc1