# combos_fullscale.py

# combos_fullscale.py

def combos(data,n):
    if not n:
        return [[]]
    d=[]
    for i in range(0,len(data)):
        m=data[i]
        remdata=data[i+1:]
        for p in combos(remdata,n-1):
            d.append([m]+p)
    return d

def combos_fullscale(data):
    d = []
    for z in range(1,len(data)+1):
        d.extend(combos(data, z))
    return d

print combos_fullscale(["A","B","C"])

'''
output...

[['A'], ['B'], ['C'], ['A', 'B'], ['A', 'C'], ['B', 'C'], ['A', 'B', 'C']]
'''