Lots of extra output to console when running example from docs.

[stuaxo]

I ran the following example on Ubuntu 21.04 in a virtualenv [1] from the docs (minor changes, I made y global to stop it complaining and added no_loop so it runs once), and there is a lot of console output [2]

[1] bot program

from p5 import *

# The statement in setup() function
# ececute once when the program begins
def setup():
    global y
    size(640, 360) # size must be the first statement
    stroke(255) # Set line drawing color to white
    y = 0

# The statements in draw() are executed until the
# program is stopped. Each statement is executed in
# sequence and after the last line is read, the first
# line is executed again.
def draw():
    global y
    background(0) # Clear the screen with a black background
    y = y - 1
    if y < 0:
            y = height

    line((0, y), (width, y))
    
    no_loop()
    print()


if __name__ == '__main__':
    run()

[2] console output

WARNING: Traceback (most recent call last):
  File "/home/stu/projects/work/dit/firebreak/data-vis-scratch/p5test.py", line 29, in <module>
    run()
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/p5/sketch/userspace.py", line 155, in run
    p5.sketch = Sketch(setup_method, draw_method, handlers, frame_rate)
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/p5/sketch/base.py", line 60, in __init__
    app.Canvas.__init__(
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/app/canvas.py", line 211, in __init__
    self.create_native()
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/app/canvas.py", line 228, in create_native
    self._app.backend_module.CanvasBackend(self, **self._backend_kwargs)
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/app/backends/_glfw.py", line 298, in __init__
    self._on_resize(self._id, size[0], size[1])
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/app/backends/_glfw.py", line 394, in _on_resize
    self._vispy_canvas.events.resize(
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/util/event.py", line 453, in __call__
    self._invoke_callback(cb, event)
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/util/event.py", line 471, in _invoke_callback
    _handle_exception(self.ignore_callback_errors,
  << caught exception here: >>
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/util/event.py", line 469, in _invoke_callback
    cb(event)
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/p5/sketch/base.py", line 157, in on_resize
    p5.renderer.reset_view()
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/p5/sketch/renderer2d.py", line 82, in reset_view
    self.texture_prog['modelview'] = self.modelview_matrix.T.flatten()
TypeError: 'NoneType' object does not support item assignment
ERROR: Invoking <bound method Sketch.on_resize of <Sketch (Glfw) at 0x7f0abd37f310>> for ResizeEvent

Exception ignored on calling ctypes callback function: <function CanvasBackend._on_close at 0x7f0abd392dc0>
Traceback (most recent call last):
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/glfw/__init__.py", line 660, in callback_wrapper
    return func(*args, **kwargs)
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/app/backends/_glfw.py", line 400, in _on_close
    self._vispy_canvas.close()
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/app/canvas.py", line 463, in close
    self.events.close()
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/util/event.py", line 453, in __call__
    self._invoke_callback(cb, event)
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/vispy/util/event.py", line 469, in _invoke_callback
    cb(event)
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/p5/sketch/base.py", line 148, in on_close
    exit()
  File "/usr/lib/python3.9/_sitebuiltins.py", line 26, in __call__
    raise SystemExit(code)
SystemExit: None
Traceback (most recent call last):
  File "/home/stu/projects/work/dit/firebreak/data-vis-scratch/p5test.py", line 29, in <module>
    run()
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/p5/sketch/userspace.py", line 167, in run
    exit()
  File "/home/stu/.virtualenvs/firebreakdatavis/lib/python3.9/site-packages/p5/sketch/userspace.py", line 250, in exit
    p5.exit(*args, **kwargs)
AttributeError: module 'p5.core.p5' has no attribute 'exit'

[github-actions]

Thank you for submitting your first issue to p5py

[talledodiego]

I have the same issue. Nevertheless the program seems to work just fine.

[stuaxo]

@talledodiego nice! I just gave up and assumed I hadn't got things installed properly.

[tushar5526]

Closing as this was fixed in #346