Definition

Helper functions

zip

    Perl version of for x,y,z in zip (arr_x, arr_y, arr_z)

    Parameters
    ----------
    $sub_ref, called with @_ filled with 
    $arr_x->[$i], $arr_y->[$i], $arr_z->[$i]
    for each loop iteration.

    @array_refs

enumerate

    Same as zip, but argument list in anonymous sub is prepended
    by iteration count

assert

    Parameters
    -----------
    Bool $input
    Str  $error_str
    Calls Carp::confess with $error_str//"AssertionError" if $input is false

check_call

    Check the return value of C API call

    This function will raise exception when error occurs.
    Wrap every API call with this function

    returns C API call return values stripped of first return value,
    checks for return context and returns first element in
    the values list when called in scalar context. 

build_param_doc

    Build argument docs in python style.

    arg_names : list of str
        Argument names.

    arg_types : list of str
        Argument type information.

    arg_descs : list of str
        Argument description information.

    remove_dup : boolean, optional
        Whether remove duplication or not.

    Returns
    -------
    docstr : str
        Python docstring of parameter sections.

_notify_shutdown

    Notify MXNet about a shutdown.