BMI interface returns wrong data types

[sverhoeven]

Calling bmi methods via grcp4bmi and Docker is giving errors.

model.get_output_var_names() returns error with

Cell(['Fluxes leaving the model > flux_out', 'Internal fluxes > flux_in',
       'Storages (time = t) > S(t)', 'Water balance check > wb'],
      dtype=object) has type <class 'oct2py.io.Cell'>, but expected one of: (<class 'bytes'>, <class 'str'>)

model.get_value('flux_out') returns error with

Arrays with type {} cannot be transmitted through this GRPC channel

[sverhoeven]

Following get_value fails:

• S(t), must be array of float instead of float
• mod, is a string while grpc4bmi only supports array of float/int/double, drop from get_value use get_component_name to get model name
• par, must be array of float instead of float
• sol, returns struct, move sol.name to get_component_name and make tol and iter avaliable as vars
• wb, must be array of float instead of float

[sverhoeven]

• get_input_var_names, list
• get_output_var_names, list
• get_time_units, str
• get_time_step, float
• get_current_time, float
• get_start_time, float
• get_end_time, float
• get_var_grid, int = 1
• get_var_type, str, each var is 'double'
• get_var_itemsize, int, each var is 8
• get_var_nbytes, int, each var is 8
• get_grid_rank, int
• get_grid_size, int
• get_grid_type, str
• get_grid_shape, list
• get_grid_origin, list
• get_grid_spacing, list
• get_grid_x, list
• get_grid_y, list
• get_grid_z, list

[sverhoeven]

• set_value_at_indices, str, list, list
• set_value, str, list, blocked due to set_value of bmi object on server does not recieve a numpy array eWaterCycle/grpc4bmi#47

[sverhoeven]

@JaroCamphuijsen could you check if all functions accept and return the correct data types?