"sys.path.insert" error

[texx00]

I tried to load the library by using sys.path.insert but there was an error at runtime:
File "main.py", line 6, in <module> import VL53L0X
File "/home/pi/*MyPath*/lib/VL53L0X_rasp_python/python/VL53L0X.py", line 68, in <module> tof_lib = CDLL("../bin/vl53l0x_python.so")
File "/usr/lib/python3.5/ctypes/__init__.py", line 347, in __init__ self._handle = _dlopen(self._name, mode)
OSError: ../bin/vl53l0x_python.so: cannot open shared object file: No such file or directory

I tried to add the path to the libraries environment variable and other things but I was not able to fix it.

I did find a workaround by changing the VL53L0X.py library file like this on line 67:
# Load VL53L0X shared lib
import os
dirname = os.path.dirname(__file__)
filename = os.path.join(dirname, "../bin/vl53l0x_python.so")
tof_lib = CDLL(filename)

I've never worked/used ctypes and I'm sure this is not the best solution but I cannot understand if I'm doing something wrong or if it is really a library issue.

[MohammedKhaliid]

I have the same issue here and can't solve it too, so have you found any solution to that?

[texx00]

To make it work I needed to change it like this:

I did find a workaround by changing the VL53L0X.py library file like this on line 67:

import os 
dirname = os.path.dirname(__file__)
filename = os.path.join(dirname, "../bin/vl53l0x_python.so")
tof_lib = CDLL(filename)```

[MohammedKhaliid]

Traceback (most recent call last):
  File "VL53L0X.py", line 71, in <module>
    tof_lib = CDLL(filename)
  File "/usr/lib/python3.7/ctypes/__init__.py", line 356, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: ../bin/vl53l0x_python.so: cannot open shared object file: No such file or directory

Almost the same error after the editing !!

could you help me with that?

[texx00]

Are you building the library with make? Check if you have the .so file in the bin folder... This is the only idea I have

[MohammedKhaliid]

I didn't find the .so file in bin folder although I have made all the steps mentioned in the post, so do you have any idea how to add this file and solve this problem?
Thanks in advance

[texx00]

You need to be sure the make command is running correctly and the file should be created automatically. I never worked with ctypes thus I do not know more than this. Make is compiling the library from c code into the .so file. You may look around for more info about make... Maybe you can change some options or enable some logging... Not sure though

[MohammedKhaliid]

Ok, thank you for your help.

[Gerrit404]

To make it work I needed to change it like this:

I did find a workaround by changing the VL53L0X.py library file like this on line 67:

import os 
dirname = os.path.dirname(__file__)
filename = os.path.join(dirname, "../bin/vl53l0x_python.so")
tof_lib = CDLL(filename)```

Thanks! I had issues using this package as a subfolder in my program. My executing main is two folders above this package folder. By adjusting the VL53L0X.py with your settings it works

[DansDesigns]

I tried the solution mentioned above but that didnt work for me (NanoPi Neo) so i put the explicit path into line 67:

# Load VL53L0X shared lib
tof_lib = CDLL("/home/pi/VL53L0X_rasp_python/bin/vl53l0x_python.so")

and this seemed to work however i now get the following issue:

VL53L0X Start Ranging Object 0 Address 0x29

Call of VL53L0X_DataInit
API Status: -20 : Control Interface Error
Timing 20 ms
Call of VL53L0X_StopMeasurement
API Status: -20 : Control Interface Error

solved it by switching to another sensor..