'No module named' error for many examples.

[benthebear93]

File "grid_based_sweep_coverage_path_planner.py", line 20, in <module>
    from Mapping.grid_map_lib.grid_map_lib import GridMap
ModuleNotFoundError: No module named 'Mapping' 

I was trying to run a grid_based_sweep_coverage_path_planning and encountered ModuleNotFoundError on custom library(Module) that you created. I noticed that you recently made commit(#456) on few examples that related to sys.path.append. I could run without error after adding sys.path.append to main code(grid_based_sweep_coverage_path_planning.py) from init.py

import math
from enum import IntEnum

import numpy as np
from scipy.spatial.transform import Rotation as Rot
import matplotlib.pyplot as plt
import os
import sys

GRID_MAP_LIB = os.path.dirname(os.path.abspath(__file__)) + \
               "/../../Mapping/"

sys.path.append(GRID_MAP_LIB)

try :
    from grid_map_lib.grid_map_lib import GridMap
except ImportError:
    raise

I also notice that some of the examples still doesn't have init.py file. Is there any reason you separate sys.path.append part to init.py? and i don't know if the code is wrong or i am doing something wrong.

frenet_optimal_trajectory.py has sys.path.append inside its own code works fine. grid_based_sweep_coverage_path_planner.py, closed_loop_rrt_star_car.py has sys.path.append inside init.py code which gives ModuleNotFoundError.

Desktop (please complete the following information):

• Python version : 3.8.10
• Each library version

[AtsushiSakai]

Hi. These should be fixed. If you are interested in, your PR is welcome.

[benthebear93]

Hi. These should be fixed. If you are interested in, your PR is welcome.

I will try to do it in this week or so :)