python - Is there a one line code to find maximal value in a matrix? -

to find maximal value in matrix of numbers, can code 5 lines solve problem:

ans = matrix[0][0] x in range(len(matrix)):     y in range(len(matrix[0])):         ans = max(ans, matrix[x][y]) return ans 

is there 1 line solution problem? 1 came pretty awkward actually:

return max(max(matrix, key=max)) 

or

return max(map(max, matrix)) 

you can use generator expression find maximum in matrix. way can avoid building full list of matrix elements in memory.

maximum = max(max(row) row in matrix) 

instead of list comprehension given in previous answer here

maximum = max([max(row) row in matrix]) 

this pep (the rationale section):

...many of use cases not need have full list created in memory. instead, they need iterate on elements 1 @ time.

...

generator expressions useful functions sum(), min(), , max() reduce iterable input single value

...

the utility of generator expressions enhanced when combined reduction functions sum(), min(), , max().

also, take @ post: generator expressions vs. list comprehension.