What I'm trying to do:
I am trying to write an OOT block for GNU radio that accept complex or byte values and just pass through. (My final target is obviously do some processing of the incoming stream, but it had so many errors, I had to go back to the basics)
The error:
I receive this error at runtime
traceback (most recent call last):
File "/home/maisun/Desktop/asdf.py", line 193, in <module>
main()
File "/home/maisun/Desktop/asdf.py", line 171, in main
tb = top_block_cls()
File "/home/maisun/Desktop/asdf.py", line 82, in __init__
self.twoTypes_passthrough_0 = twoTypes.passthrough_cc(0)
AttributeError: module 'twoTypes' has no attribute 'passthrough_cc'
what I've tried:
I have looked into the source of GR itself and tried to correct my yaml files, my header files. To the best of my knowledge, I have defined 'passthrough_cc' in the twoTypes.h header file as,
typedef passthrough<std::uint8_t> passthrough_bb;
typedef passthrough<gr_complex> passthrough_cc;
Obviosly i'm still doing something wrong here.
my questions:
I have 2 questions.
First, how can I correct the CPP code and the python module? so that I can call passthrough_cc without errors.
second, I am more comfortable in C language. So sometimes GR codes are very confusing to me. GR wiki has some nice guides available. But does anyone know if there is any guide/blog post that kind of discusses the workflow of GR? For example, when I trace my codes, I start from main() and follow the flow. with GR I always get lost.
full code:
https://github.com/maisunmonowar/gr-twoTypes
Related
in order to develop my script in an external IDE, I'm trying to automatically reload a text in blender when it is modified from outside of Blender. I think I've got the idea of how it works, but there must be one tiny detail that completely blocks me from achieving my goal.
My script is the following:
import bpy
import sys
ctx = bpy.context.copy()
for area in ctx['screen'].areas:
if area.type == 'TEXT_EDITOR':
textEditor = area
for text in bpy.data.texts:
if text.name == 'main.py':
textEditor.spaces[0].text = text
bpy.ops.text.reload()
Output:
>>> exec(bpy.data.texts['reload.py'].as_string())
Traceback (most recent call last):
File "<blender_console>", line 1, in <module>
File "<string>", line 13, in <module>
File "/Applications/Blender.app/Contents/Resources/3.3/scripts/modules/bpy/ops.py", line 113, in __call__
ret = _op_call(self.idname_py(), None, kw)
RuntimeError: Operator bpy.ops.text.reload.poll() failed, context is incorrect
I cannot get what part of the context is correct. I found no solution on the Internet, even the doc recommends reading the source code to understand what might be the cause of this error, but I couldn't find it anyway in the source code.
Can someone tell me what I am missing here please?
I am new to programming on python and i am trying to create an application which uses pyMTP to communicate to an MTP device. However im getting this error and cant figure out the fix for it.
$ python c:/Users/Atul/Desktop/mtp.py
None
Traceback (most recent call last):
File "c:/Users/Atul/Desktop/mtp.py", line 2, in <module>
import pymtp
File "C:\Users\Atul\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pymtp.py", line 42, in <module>
_libmtp = ctypes.CDLL(_module_path)
File "C:\Users\Atul\AppData\Local\Programs\Python\Python36-32\lib\ctypes\__init__.py", line 348, in __init__
self._handle = _dlopen(self._name, mode)
TypeError: LoadLibrary() argument 1 must be str, not None
Think it is not a program, but a library, you have to import. Like once in python, import mtp (or import pymtp, i don't know anymore). Please be aware pymtp is about 5 years old and does only run on python 2. I have been working on a python 3 version but it's not really complete because i found testing MTP software is extremely time consuming because the mtp interface is very, very slow at startup. I suggest to look at gMTP to transfer you files.
I too have run across the infamous pyglet memory leak, that occurs when one needs to update text components at the frame level (with a text variable typically computed in a separate code component, also at frame level).
The leak/bug crashes a running script with an error message of the sort:
File "C:\Program Files (x86)\PsychoPy2\lib\site-packages\psychopy-1.83.04-py2.7.egg\psychopy\visual\window.py", line 541, in flip
thisStim.draw()
File "C:\Program Files (x86)\PsychoPy2\lib\site-packages\psychopy-1.83.04-py2.7.egg\psychopy\visual\text.py", line 603, in draw
self._pygletTextObj.draw()
File "C:\Program Files (x86)\PsychoPy2\lib\site-packages\pyglet\font\__init__.py", line 565, in draw
self._layout.draw()
File "C:\Program Files (x86)\PsychoPy2\lib\site-packages\pyglet\text\layout.py", line 852, in draw
self.batch.draw()
File "C:\Program Files (x86)\PsychoPy2\lib\site-packages\pyglet\graphics\__init__.py", line 544, in draw
func()
File "C:\Program Files (x86)\PsychoPy2\lib\site-packages\pyglet\graphics\__init__.py", line 476, in <lambda>
(lambda d, m: lambda: d.draw(m))(domain, mode))
File "C:\Program Files (x86)\PsychoPy2\lib\site-packages\pyglet\graphics\vertexdomain.py", line 313, in draw
glDrawArrays(mode, starts[0], sizes[0])
WindowsError: exception: access violation reading 0x00000010
Exception TypeError: "'NoneType' object is not callable" in <bound method Server.__del__ of <pyolib.server.Server object at 0x0EFB3670>> ignored
I know the PsychoPy community has linked this to a memory leak in pyglet that was meant to have been fixed around April 2016 according to this thread. I downloaded the latest version of Pyglet (which is v1.2.4 - released apparently in Sep 2015, so before the supposed fix of the leak) and replaced its contents under c:\Program Files (x86)\PsychoPy2\Lib\site-packages\pyglet\. However, this did not fix my problem.
Unfortunately, my experiment does not make sense if I give up the frame-wise computation that feeds the text component.
An older thread that I found suggested the following workaround: in the code component that computes frame-wise the value of the text variable being displayed, only assign this variable a new value if that new value actually differs from the previous value. However, even after changing my code component this way, the pyglet error still pops up.
Assuming the bug was fixed in Pyglet, is it not v1.2.4 that reflects this fix, and should it not be updated by overwriting the contents of c:\Program Files (x86)\PsychoPy2\Lib\site-packages\pyglet\ (maintaining the original folder structure)?
Assuming the bug was in fact NOT fixed in Pyglet, can anyone suggested a different workaround that I can try to make my PsychoPy expt not crash?
Many thanks indeed for your help.
(Apologies for the double post both here and on the psychopy group; will update both threads as soon as there is a response on the other, to avoid people wasting time with double answers).
One workaround is to use TextBox instead of TextStim. To do that, one first defines a stimulus object in a code component (under "begin routine"), such as
textbox = visual.TextBox(window=win,
text='Something',
font_size=21,
font_color=[-1,-1,1],
size=(1.9, .3),
pos=(0.0, 0.25),
grid_horz_justification='center',
units='norm')
then, perhaps under the "every frame" tab, one uses code to customise & call upon the thus-defined textbox, with syntax as found on http://www.psychopy.org/api/visual/textbox.html
I'm trying to call on a custom python script within another script. Everything works fine if I run the script standalone outside of ArcGIS, but if I try to make it a custom tool with parameters, it gives me the following error:
Traceback (most recent call last):
File "C:\Users\jamil.harvich\Documents\ArcGIS\Python_Scripts\Working\IP_Anno\Script\Script_Part1.py", line 80, in <module>
arcpy.ConcatenateRowValues_AA(lyr[0] + '_Intersect', 'SHORT_DESC', 'NAME', lyr[2], '-')
File "C:\Users\jamil.harvich\Documents\ArcGIS\Python_Scripts\Working\IP_Anno\ConcatenateRowValues101.tbx", line 54, in ConcatenateRowValues
/jVXV+BHwwJ5+Gfgv/wnbP8A+NV2Eo+ZTjHPQ9qlR60cIvojBSkupxw+Avwvz/yTTwX/AOE7Z/8A
AttributeError: Object: Tool or environment <ConcatenateRowValues_AA> not found
Failed to execute (Script).
Thanks. I hope the question is clear. If you need me to specify anything, just ask.
Before calling it, in your script you should import the Toolbox that contains your tool "ConcatenateRowValues_AA", with the command:
arcpy.ImportToolbox(TOOLBOX_PATH)
where TOOLBOX_PATH is the absolute path to your .tbx file.
In python you can compile() string to be executed faster with exec(). But as soon as i use it, we lost information when an exception happen in the exec.
For example, here is a code snippet that calling a unknown method (for demo purposes):
code = 'my_unknown_method()'
bytecode = compile(code, '<string>', 'exec')
And later, i'm calling exec on that bytecode:
exec bytecode
The traceback showed is:
Traceback (most recent call last):
File "test.py", line 3, in <module>
exec bytecode
File "<string>", line 1, in <module>
NameError: name 'my_unknown_method' is not defined
The "exec()" frame is now obscure. I would like to have a better exception like:
Traceback (most recent call last):
File "test.py", line 3, in <module>
exec "my_unknown_method()"
File "<string>", line 1, in <module>
NameError: name 'my_unknown_method' is not defined
Any thoughts ?
Notes:
I don't want to use the second argument of compile (the filename)
I have tested to play with inspect and modify f_code on the frame, but it's readonly attribute.
EDIT: after looking more to sys.excepthook, i've seen that in python source code/traceback.c, when python want to show the line content, they are fopen() directly the file if found. No hook available at all to display our own content. The only way would be to create in real fake filename on disk ? Anyone ?
EDIT2: i checked some jinja2 debug code, and they are rewriting traceback too, but not for content. Would i need a custom except hook ? My concerns with it is since it's not in the traceback itself, if an user/module/whatever take the exception, the traceback will not contain valuable information.
You should have a look at this talk by Armin Ronacher. He's the author of Jinja2 and in this talk he explained, how he manipulates stack traces in Jinja2. If I remember correctly, he's using ctypes, to manipulate the data structures on the C level of Python. The talk was in my opinion the best talk of the whole Europython 2011 by the way.
After a deep search, it's not possible, CPython is using its own API to determine where the file is etc, and it cannot be patched in pure Python.
How about something like this:
import sys
def mkexec(code_str):
bc = compile(code, '<string>', 'exec')
def run():
try:
exec bc
except: # Yes I know a bare except
t, v, tb = sys.exc_info()
raise MyUsefullException("%s raised %s" % (code_str, v))
return run
exe = mkexec("some_unknown_something()")
exe()