Halcon学习之tuple

* define a tuple for int, double, string... not for object
d:=[]
* assignment
d[0] := 'a string'
* get tuple length, method 1:
leng:=|d|
* get tuple length, method 2:
tuple_length(d,leng)
* get length of object tuple 
count_obj (ContoursSplit, Number)