Syntax error with PyRep package

[helenrensiyu]

Hi, I just downloaded CoppeliaSim and installed PyRep today. However, when I was trying to run examples, I have gotten the following error:

Traceback (most recent call last): File "", line 1, in File "/home/helen/.local/lib/python3.5/site-packages/pyrep/init.py", line 3, in from .pyrep import PyRep File "/home/helen/.local/lib/python3.5/site-packages/pyrep/pyrep.py", line 1, in from pyrep.backend import sim, utils File "/home/helen/.local/lib/python3.5/site-packages/pyrep/backend/utils.py", line 8, in from pyrep.objects.object import Object File "/home/helen/.local/lib/python3.5/site-packages/pyrep/objects/init.py", line 1, in from pyrep.objects.object import Object File "/home/helen/.local/lib/python3.5/site-packages/pyrep/objects/object.py", line 9 object_type_to_class: Dict[ObjectType, Any] = {} ^ SyntaxError: invalid syntax

In addition to this, while running the installation, other syntax errors were detected too:

[byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/gripper.py to gripper.cpython-35.pyc File "/home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/gripper.py", line 22 self._old_parents: List[Object] = [] ^ SyntaxError: invalid syntax

byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/locobot_gripper.py to locobot_gripper.cpython-35.pyc byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/baxter_gripper.py to baxter_gripper.cpython-35.pyc byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/panda_gripper.py to panda_gripper.cpython-35.pyc byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/jaco_gripper.py to jaco_gripper.cpython-35.pyc byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/baxter_suction_cup.py to baxter_suction_cup.cpython-35.pyc byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/mico_gripper.py to mico_gripper.cpython-35.pyc byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/dobot_suction_cup.py to dobot_suction_cup.cpython-35.pyc byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/suction_cup.py to suction_cup.cpython-35.pyc File "/home/helen/.local/lib/python3.5/site-packages/pyrep/robots/end_effectors/suction_cup.py", line 17 self._old_parents: List[Object] = [] ^ SyntaxError: invalid syntax

byte-compiling /home/helen/.local/lib/python3.5/site-packages/pyrep/robots/configuration_paths/arm_configuration_path.py to arm_configuration_path.cpython-35.pyc File "/home/helen/.local/lib/python3.5/site-packages/pyrep/robots/configuration_paths/arm_configuration_path.py", line 23 self._rml_handle: Optional[int] = None ^ SyntaxError: invalid syntax

I am using Python 3.5.2. Could this be due to different versions of Python? It would be great if someone who tried to install recently or just anyone could shed some light on this. Thank you!!

[gesheng199832]

https://docs.python.org/3.6/whatsnew/3.6.html#pep-526-syntax-for-variable-annotations

[themathgeek13]

It's pretty easy to fix these errors for Python3.5, as mentioned by @gesheng199832 above, you can just replace all of the lines which have issues like this:

self._rml_handle: Optional[int] = None

And replace it with standard Python syntax as shown below:

self._rml_handle = None # Optional[int]

(comment is just to specify the type that was made more explicit in Python3.6)

[stale[bot]]

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