*Memo:
product() can return the iterator which does cartesian product with the elements of *iterables one by one to return a tuple of zero or more elements one by one as shown below:
*Memo:
- The 1st arguments are
*iterables(Optional-Default:()-Type:Iterable):- Don't use any keywords like
*iterables=,iterables=, etc.
- Don't use any keywords like
- The 2nd argument is
repeat(Optional-Default:1-Type:int):- It's the length of the returned tuple.
- It must be
0 <= x. -
repeat=must be used.
from itertools import product v = product() v = product((), repeat=0) print(v) # <itertools.product object at 0x000001BE99723500> print(next(v)) # () print(next(v)) # StopIteration: from itertools import product v = product('ABC') v = product(['A', 'B', 'C']) print(next(v)) # ('A',) print(next(v)) # ('B',) print(next(v)) # ('C',) print(next(v)) # StopIteration: from itertools import product for x in product('ABC', repeat=2): # for x in product(['A', 'B', 'C'], repeat=2): print(x) # ('A', 'A') # ('A', 'B') # ('A', 'C') # ('B', 'A') # ('B', 'B') # ('B', 'C') # ('C', 'A') # ('C', 'B') # ('C', 'C') from itertools import product for x in product('ABC', repeat=3): # for x in product(['A', 'B', 'C'], repeat=3): print(x) # ('A', 'A', 'A') # ('A', 'A', 'B') # ('A', 'A', 'C') # ('A', 'B', 'A') # ('A', 'B', 'B') # ('A', 'B', 'C') # ('A', 'C', 'A') # ('A', 'C', 'B') # ('A', 'C', 'C') # ('B', 'A', 'A') # ('B', 'A', 'B') # ('B', 'A', 'C') # ('B', 'B', 'A') # ('B', 'B', 'B') # ('B', 'B', 'C') # ('B', 'C', 'A') # ('B', 'C', 'B') # ('B', 'C', 'C') # ('C', 'A', 'A') # ('C', 'A', 'B') # ('C', 'A', 'C') # ('C', 'B', 'A') # ('C', 'B', 'B') # ('C', 'B', 'C') # ('C', 'C', 'A') # ('C', 'C', 'B') # ('C', 'C', 'C') from itertools import product for x in product('ABC', repeat=4): # for x in product(['A', 'B', 'C'], repeat=4): print(x) # ('A', 'A', 'A', 'A') # ('A', 'A', 'A', 'B') # ('A', 'A', 'A', 'C') # ('A', 'A', 'B', 'A') # ('A', 'A', 'B', 'B') # ('A', 'A', 'B', 'C') # ('A', 'A', 'C', 'A') # ('A', 'A', 'C', 'B') # ('A', 'A', 'C', 'C') # ('A', 'B', 'A', 'A') # ('A', 'B', 'A', 'B') # ('A', 'B', 'A', 'C') # ('A', 'B', 'B', 'A') # ('A', 'B', 'B', 'B') # ('A', 'B', 'B', 'C') # ('A', 'B', 'C', 'A') # ('A', 'B', 'C', 'B') # ('A', 'B', 'C', 'C') # ('A', 'C', 'A', 'A') # ('A', 'C', 'A', 'B') # ('A', 'C', 'A', 'C') # ('A', 'C', 'B', 'A') # ('A', 'C', 'B', 'B') # ('A', 'C', 'B', 'C') # ('A', 'C', 'C', 'A') # ('A', 'C', 'C', 'B') # ('A', 'C', 'C', 'C') # ('B', 'A', 'A', 'A') # ('B', 'A', 'A', 'B') # ('B', 'A', 'A', 'C') # ... from itertools import product for x in product('AB', 'C'): # for x in product(['A', 'B'], ['C']): print(x) # ('A', 'C') # ('B', 'C') from itertools import product for x in product('AB', 'C', repeat=2): # for x in product(['A', 'B'], ['C'], repeat=2): print(x) # ('A', 'C', 'A', 'C') # ('A', 'C', 'B', 'C') # ('B', 'C', 'A', 'C') # ('B', 'C', 'B', 'C') from itertools import product for x in product('AB', 'C', repeat=3): # for x in product(['A', 'B'], ['C'], repeat=3): print(x) # ('A', 'C', 'A', 'C', 'A', 'C') # ('A', 'C', 'A', 'C', 'B', 'C') # ('A', 'C', 'B', 'C', 'A', 'C') # ('A', 'C', 'B', 'C', 'B', 'C') # ('B', 'C', 'A', 'C', 'A', 'C') # ('B', 'C', 'A', 'C', 'B', 'C') # ('B', 'C', 'B', 'C', 'A', 'C') # ('B', 'C', 'B', 'C', 'B', 'C') from itertools import product for x in product('AB', 'C', repeat=4): # for x in product(['A', 'B'], ['C'], repeat=4): print(x) # ('A', 'C', 'A', 'C', 'A', 'C', 'A', 'C') # ('A', 'C', 'A', 'C', 'A', 'C', 'B', 'C') # ('A', 'C', 'A', 'C', 'B', 'C', 'A', 'C') # ('A', 'C', 'A', 'C', 'B', 'C', 'B', 'C') # ('A', 'C', 'B', 'C', 'A', 'C', 'A', 'C') # ('A', 'C', 'B', 'C', 'A', 'C', 'B', 'C') # ('A', 'C', 'B', 'C', 'B', 'C', 'A', 'C') # ('A', 'C', 'B', 'C', 'B', 'C', 'B', 'C') # ('B', 'C', 'A', 'C', 'A', 'C', 'A', 'C') # ('B', 'C', 'A', 'C', 'A', 'C', 'B', 'C') # ('B', 'C', 'A', 'C', 'B', 'C', 'A', 'C') # ('B', 'C', 'A', 'C', 'B', 'C', 'B', 'C') # ('B', 'C', 'B', 'C', 'A', 'C', 'A', 'C') # ('B', 'C', 'B', 'C', 'A', 'C', 'B', 'C') # ('B', 'C', 'B', 'C', 'B', 'C', 'A', 'C') # ('B', 'C', 'B', 'C', 'B', 'C', 'B', 'C') 
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