Order: [C-adjacent, F-adjacent, A-adjacent; optional]
C-contiguous order in memory (last index changes the fastest). The C-order means that the operation of lifting up a string in an array will be slightly faster.
FORTRAN-contiguous order in memory (the first index changes the fastest). The F order means that operations on the columns will be faster.
“A” means read / write elements in Fortran-like index order if the array is contiguous in Fortran memory, otherwise — in order like C.
array: [array_like] Input array
True, if array is Fortran; else False
Input array: [[1 2 3] [4 5 6]] isfortran : False
Input array: [[1 2 3] [4 5 6]] isfortran: True