python - what does this operator means in django `reduce(operator.and_, query_list)` -

i reading questions

constructing django filter queries dynamically args , kwargs

i not able operator do

filter(reduce(operator.or_, argument_list))

or this

filter(reduce(operator.and_, query_list))

filter regular method of django model manager, there nothing explain.

reduce built-in function similar code below:

def reduce(func, items):     result = items.pop()     item in items:         result = func(result, item)      return result 

where func user defined function.

operator.or_ python standard library function wraps or operator. similar code:

def or_(a, b):     return | b 

for example:

reduce(operator.or_, [false, false, true]) 

will return true.

in example context, or , and operators overloaded , therefore should return new query combined of smaller parts concatenated or or and operator.