Cprod -- (writing this: itertools.product([0, 1], repeat=N )

HenHanna HenHanna at dev.null
Wed May 22 01:21:53 EDT 2024


dn wrote:

> On 22/05/24 07:14, HenHanna via Python-list wrote:
>> 
>> How can i write this function Cprod (Cartesian Product) simply?
>> 
>>                  (writing this out: itertools.product([0, 1], repeat=N
>> )
>> 
>> The value can be a list or a Tuple.
>> 
>>                  cprod([0, 1], 1) => ((0) (1))
>> 
>>                  cprod([0, 1], 2) => ((0,0) (0,1) (1,0) (1,1))
>> 
>> 
>> 
>> This works:
>> 
>>     def cprod(x, c):
>>          if c==1: return [[i] for i in x]
>>          Sub= cprod(x, c-1)
>>          return [i  for F in x   for i in [[F]+R for R in Sub]]
>> 
>> 
>> ---------- Is there another way to write [F]+R ???
>> 
>>                 Other ways to improve it?

> https://python.readthedocs.io/en/stable/library/itertools.html#itertools.product
>    Regards,  =dn


         Thank you...  That code looks elegant...  I'll study it.


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