attributeerror model object has no attribute outbound nodes. How to increase the number of CPUs in my computer? privacy statement. import torch By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 6 comments Comments. cv2.imread.pngimg1 = cv2.imread('data/Dubai_11122012.png', 0),, AttributeError: 'NoneType' object has no attribute 'XXX'NoneTypeNonetype, qq_43086653: Does Cosmic Background radiation transmit heat? It is possible than returning None there used to work and merely opted out of pylab's tracking (rather than never supporting None here and this was a bug introduced in the recent refactor over there). nbconvert : 6.5.3 Tkinter: AttributeError: NoneType object has no attribute <attribute name> (4 answers) Closed 2 years ago . I'm fairly new to Python and have just started to play around with tkinter. Python version: 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0] on Debian 10.12, Selected Jupyter core packages So, not_yet_bought_set becomes None now. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Suspicious referee report, are "suggested citations" from a paper mill? From the small amount of code you have posted it appears that access to the Figure and Axes objects may not be necessary. Find centralized, trusted content and collaborate around the technologies you use most. rev2023.3.1.43269. Dealing with hard questions during a software developer interview. /Applications/Xcode.app/Contents/Developer/usr/bin/make install-recursive make[1]: *** [install-bfd] Error 2 Calling grid and then later calling pack isn't going to do what you think it's going to do. 182. attributeerror values object has no attribute process dependency links. Chances are the .grid() method doesn't return a value. How do I fit an e-hub motor axle that is too big? I'm having this issue now and was wondering how you managed to resolve it given that you closed this issue the very next day? Partner is not responding when their writing is needed in European project application. Break up the creation of the canvas object from drawing it. [duplicate], Tkinter: AttributeError: NoneType object has no attribute , The open-source game engine youve been waiting for: Godot (Ep. Dot product of vector with camera's local positive x-axis? import os PTIJ Should we be afraid of Artificial Intelligence? In python, when you do foo=x().y(), foo will always have the value of the last function called. The problem seem to arrive when we pass timeout=None to request. Already on GitHub? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Well occasionally send you account related emails. from PIL import Image Error: " 'dict' object has no attribute 'iteritems' ". attributeerror model object has no attribute outbound nodes. How to make a timezone aware datetime object. Strange behavior of tikz-cd with remember picture. http = credentials.authorize (http) AttributeError: 'NoneType' object has no attribute 'authorize'. Well lets close here and re-open if ipython/matplotlib-inline#18 bounces back to us. and tada, at https://github.com/ipython/matplotlib-inline/blob/master/matplotlib_inline/backend_inline.py#L55 we have a return statement that potentially makes the figure manager None. Connect and share knowledge within a single location that is structured and easy to search. import tensorrt as trt /Applications/Xcode.app/Contents/Developer/usr/bin/make install-recursive Some common situations that may prevent the reference count of an object from going to zero include: circular references between objects (e.g., a doubly-linked list or a tree data structure with parent and child pointers); a reference to the object on the stack frame of a function that caught an exception (the traceback stored in sys.exc_info . # timeout is cumulative for all request operations, # (request, redirects, responses, data consuming). If a valid Screen id is given in the Builder experiment settings (1 for a single screen setup) , it should run with the iohub backend. privacy statement. What about matplotlib-inline ? For example, you can read CSV using the read_csv() function as well as export data frame to CSV file using the to_csv() function. You can use the draw() instead of show() attribute. Closing as non-reproducible, please post a definitive example if you can come up with one. But my question remains: do you have any evidence that this is a seaborn problem per se? Already on GitHub? Removing an ax created with twinx/twiny and then adding a new one with a plot, or just setting xlim/ylim for it triggers the crash (twinx -> xlim, twiny -> ylim). Why do I get AttributeError: 'NoneType' object has no attribute 'something'? privacy statement. jupyter_client : 7.3.4 188. import pycuda.driver as cuda appendaNone. You signed in with another tab or window. Search for jobs related to Attributeerror module tensorflow has no attribute gradienttape or hire on the world's largest freelancing marketplace with 22m+ jobs. please include those exceprts into that new issue. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. AttributeError: 'NoneType' object has no attribute 'group' Example: import re # Search for an upper case "S" character in the beginning of a word, and print the word: txt = "The rain in Spain" for i in txt.split(): x = re.match(r"\bS\w+", i) print(x.group()) Why is there a memory leak in this C++ program and how to solve it, given the constraints? Traceback . Well occasionally send you account related emails. The number of distinct words in a sentence. Running the below code I get an attribute error for but1.pack() (NoneType object has no attribute pack). My last working build on readthedocs used the following packages installed via pip: First, the default packages of readthedocs: and then the packages I need to build the docs: That was one day and two hours ago. Thus, but1 is None, and thus you get `'NoneType' object has no attribute 'pack'". /bin/sh ./mkinstalldirs /usr/local /usr/local this will return None and you are assigning it to not_yet_bought_set. d.items! import torchvision Use axtitle instead or, better, don't use external axes mode. related bugs. rev2023.3.1.43269. To fix this, simply do this. It's . for param in group['params']: Chercher le mot clef By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Can the Spiritual Weapon spell be used as cover? Error: " 'dict' object has no attribute 'iteritems' ". Do EMC test houses typically accept copper foil in EUT? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This site uses different types of cookies, including analytics and functional cookies (its own and from other sites). Just sticking to grid and it's all working now. Partner is not responding when their writing is needed in European project application. What tool to use for the online analogue of "writing lecture notes on a blackboard"? rev2023.3.1.43269. 1QgsMapCanvas. What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence? To fix this, simply do this. A possible change to mplfinance might be to add a warning in this section of code here. import pycuda.autoinit How did Dominion legally obtain text messages from Fox News hosts? But a few things did change with the backend fallbacks, so its not impossible the CI is not falling back gracefully? bert_pretrainbert-base-chinese-vocab.txt vocab.txt is there a chinese version of ex. install: /usr/local/share/info/bfd.info: Permission denied Stack Overflow . When we try to call or access any attribute on a value that is not associated with its . swap\u unique\u keys. attributeerror model object has no attribute outbound nodes. Sign in Besides . qgis mapCanvas"AttributeError: 'NoneType' object has no attribute 'mapCanvas'". sol May 27, 2022, 1:09pm #4. I checked the commit between the last successful and first failing build. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Asking for help, clarification, or responding to other answers. If I comment out the pack() lines then the buttons don't appear in the frame. Please see if you can trigger the error without seaborn (i.e. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The window still appears and all the buttons behave as expected. To learn more, see our tips on writing great answers. Thanks for contributing an answer to Stack Overflow! For some reason though i am getting FigureCanvasTkAgg object has no attribute show but for many it seems to be working. Hi There, as a temporary solution using experiment settings > inputs> and changing keyboard from iohub to psychtoolbox seems to solve this issue! EDIT: is executed, add will be invoked on None. I am sorry for the confusion I introduced! max_batch_size = 1 What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? It's free to . Truce of the burning tree -- how realistic? With the previous version set, everything works again. Therefore it returns None. If you do but1.grid() and later but1.pack(), any effect that calling grid had will be thrown away, as if you had never called grid in the first place. In this article we will discuss AttributeError:Nonetype object has no Attribute Group. If you feel like there's important points made in this discussion, You can manipulate dataframes using the pandas module. How can I change a sentence based upon input to a command? .././../install-sh -c -d '/usr/local/share/info' Did you mean: 'randint'? See https://github.com/1kastner/conflowgen/runs/7882122350?check_suite_focus=true for the original traceback. attributeerror model object has no attribute outbound nodes. Search for jobs related to Attributeerror model object has no attribute outbound nodes or hire on the world's largest freelancing marketplace with 22m+ jobs. Why does Jesus turn to the Father to forgive in Luke 23:34? Searching I can see other people have had this error, but none of the answers given solved my problem. Rename .gz files according to names in separate txt-file. . Why doesn't the federal government manage Sandia National Laboratories? Article 03/11/2022; 2 minutes to read; 2 contributors . Suspicious referee report, are "suggested citations" from a paper mill? Becca May 27, 2022, 11:55am #3. AttributeError: 'function' object has no attribute. AttributeError: 'xxxx' object has no attribute 'xxxx' error . def clip_gradient(optimizer, grad_clip): Chercher le mot clef colab. I will keep you updated. That usually means that an assignment or function call up above failed or returned an unexpected result. Asking for help, clarification, or responding to other answers. Hoping you can help. for group in optimizer.param_groups: 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. rev2023.3.1.43269. LEM current transducer 2.5 V internal reference. For me, both options (closing the ticket or waiting for the final answer before doing that) are okay. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. But as far as I can tell this error is having no effect on the window's functionality, it is still packing the button. Well occasionally send you account related emails. The next time. [Bug]: Figure manager is gone - AttributeError: 'NoneType' object has no attribute 'canvas', https://github.com/1kastner/conflowgen/runs/7882122350?check_suite_focus=true, https://github.com/ipython/matplotlib-inline/blob/master/matplotlib_inline/backend_inline.py#L55, https://pypi.org/project/matplotlib-inline/#history, [Bug]: Figure manager is gone - AttributeError: 'NoneType' object has no attribute 'canvas'. Dec 5, 2021 at 20:06 . Attributeerror model object has no attribute outbound nodes22 . . Partner is not responding when their writing is needed in European project application, Torsion-free virtually free-by-cyclic groups, Is email scraping still a thing for spammers. Freelancer Story Identification: Nanomachines Building Cities. Rename .gz files according to names in separate txt-file. 738 fig.suptitle(title,**title_kwargs). How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? What is the meaning of single and double underscore before an object name? Connect and share knowledge within a single location that is structured and easy to search. import time If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? By clicking Sign up for GitHub, you agree to our terms of service and So, you have to ask yourself, "why does my variable have the value None?". For example, attempting to access an attribute of a variable that is None will cause this error: 3. The DataFrame API contains a small number of protected keywords. I am 95% sure that we need to fix this on the matplotib-inline side. 812 fig.set_label(fig_label) AttributeError: 'NoneType' object has no attribute 'canvas' . AttributeError: 'NoneType' object has no attribute 'landmark' WindowsPython . make[2]: *** [install] Error 2 , tensorrt 2. print(res.x) 3. How do I check if an object has an attribute? It only contains some changes in the unittests, no change in dependencies. 1kastner changed the title [Bug]: F8gure manager is gone - AttributeError: 'NoneType' object has no attribute 'canvas' [Bug]: Figure manager is gone - AttributeError: 'NoneType' object has no attribute 'canvas' Aug 17, 2022 You have to decide whether you want to use grid, or whether you want to use pack, and use only one or the other for all widgets in your root window. AttributeError: 'NoneType' object has no attribute 'get' . , SARSAR, Ah yes. It's . Bug Report: fig.suptitle, AttributeError: 'NoneType' object has no attribute 'suptitle', List of Features Not Supported in External Axes Mode. a. Conclusion. Making install in doc AttributeError: 'NoneType' object has no attribute 'cancel', AppleTV platform stopped working in 0.40.0 (push_updates), AttributeError when listening to push updates. AttributeError: 'NoneType' object has no attribute 'get' Python. this will return None and you are assigning it to not_yet_bought_set. I even tried doing canvas.show() but im getting the error "AttributeError: 'FigureCanvasTkAgg' object has no attribute 'show' " I meant i even tried doing a canvas.draw() but with that i get NoneType. /bin/sh ./mkinstalldirs /usr/local /usr/local Thanks, Ogo How to parse XML and get instances of a particular node attribute? Have a question about this project? 'NoneType' object has no attribute 'canvas' on Jupyter. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. So, not_yet_bought_set becomes None now. I'm work with python and I need a function in class like. tqltf2tf1, HJJ9379: 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. not_yet_bought_set = not_yet_bought_set.add (item) is executed, add will be invoked on None. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. make[3]: *** [install-recursive] Error 1 Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? Copy link RobinFrcd commented Aug 20, 2022 . Thanks for contributing an answer to Stack Overflow! That code changes 3 months ago and released yesterday, see https://pypi.org/project/matplotlib-inline/#history. Already on GitHub? I'm unable . Seaborn version: 0.11.2 How to fix AttributeError: 'NoneType' object has no attribute 'get'? You can only have one geometry manager in effect at a time for any given widget, and both grid and pack are geometry managers. make[4]: *** [install-info-am] Error 71 Why are non-Western countries siding with China in the UN? NoneType means that instead of an instance of whatever Class or Object you think you're working with, you've actually got None. I make this, because when I only do. Freelancer IPython/Jupyter: The text was updated successfully, but these errors were encountered: Downgrading matplotlib seems to fix the issue, tho , Seaborn version: 0.11.2 .././../install-sh -c -d '/usr/local/share/info' aNoneType. /usr/bin/install -c -m 644 ./bfd.info '/usr/local/share/info' Not the answer you're looking for? python 'NoneType' object has no attribute 'xxxx' tryexceptscan238cluster_annotations() . What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? Besides this i even tried using .draw() and i get the error "'NoneType' object has no attribute 'get_tk_widget' " by executing that code directly). ipywidgets : 7.7.1 You signed in with another tab or window. I know that the project comes with some complexity and that there are a few libraries around that most likely have nothing to do with this error. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. nbclient : 0.6.6 You signed in with another tab or window. jupyterlab : 3.4.5 @1kastner can you get the package lists from the last working and first broken run? Copy link Rorutop commented Dec 2, 2022. . as if no grid() method was applied). Search for jobs related to Attributeerror chatbot object has no attribute storage or hire on the world's largest freelancing marketplace with 22m+ jobs. Solution 1 - Call the get () method on valid dictionary. I am using tkinter to get display a histogram plotted by matplotlib. AttributeError: NoneType object has no attribute <attribute name> 4. When you get an error such as 'NoneType' object has no attribute 'X', that means you have a variable whose value is None, and you are trying to do None.X(). nbformat : 5.4.0 Attributeerror module tensorflow has no attribute gradienttape trabalhos Quero Contratar Quero Trabalhar. Has Microsoft lowered its Windows 11 eligibility criteria? Why does the impeller of torque converter sit behind the turbine? Chercher le mot clef make[3]: *** [install-recursive] Error 1 Python . How do I check if an object has an attribute? Meanwhile, please try to validate/debug the your ONNX model you can use "trtexec" command in --verbose mode and share the output log. TypeError: 'NoneType' object has no attribute 'append' In Python, it is a convention that methods that change sequences return None. The error was spotted and a new release drafted. With recent 1.3 release we start to receive this kind of crash report. Removing an ax created with twinx/twiny and then adding a new one with a plot, or just setting xlim/ylim for it triggers the crash (twinx -> xlim, twiny -> ylim). A simple example of pandas should suffice: Out of the sudden, my server CI fails with the following traceback: The first invocation is just some default invocation of pandas. 199. import numpy as np Sign in 1.algs4.rarlibsFile?>project Structure gs4jar. By clicking Sign up for GitHub, you agree to our terms of service and What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? Is that a possible source? What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence? I cannot replicate with matplotlib-inline 0.1.6. In Python, how do I determine if an object is iterable? Buscar palabra clave The reason for this is because returning a new copy of the list would be suboptimal from a performance perspective when the existing list can just be changed. Strange behavior of tikz-cd with remember picture. But it doesn't seem to be always the case. This is not a bug. Not the answer you're looking for? Thank you for tracking this down @1kastner ! I do not know why. Dont assign this to anything. can someone tell me why this is causing an error? So, the immediate fix is to move your call to grid to a separate line: However, you have another problem. From drawing it please Post a definitive example if you can use the draw ). Maintainers and the community in with another tab or window ' object has attribute! Emc test houses typically accept copper foil in EUT fairly new to Python and have started! Grid ( ) attribute # history import os PTIJ Should we be afraid attributeerror: 'nonetype' object has no attribute 'canvas Artificial Intelligence in 1.algs4.rarlibsFile >! Instances of a variable that is not associated with its responses, data consuming ) when do. On Jupyter get ( ) lines then the buttons do n't use external Axes mode between Dec and. A seaborn problem per se the client wants him to be working have a return that! Way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution &. Attribute show but for many it seems to be aquitted of everything despite serious evidence before object. Few things did change with the backend fallbacks, so its not impossible the CI is not back... Make this, because when I only do article 03/11/2022 ; 2 contributors lines then the buttons n't! Fit an e-hub attributeerror: 'nonetype' object has no attribute 'canvas axle that is structured and easy to search see other people have had error... Terms of service, privacy policy and cookie policy: & # 92 ; u keys always the... Any evidence that this is a seaborn attributeerror: 'nonetype' object has no attribute 'canvas per se ), will... [ 2 ]: * * [ install-info-am ] error 1 Python can I change a sentence upon! Assigning it to not_yet_bought_set 3 months ago and released yesterday, see https: //github.com/1kastner/conflowgen/runs/7882122350? for. The online analogue of `` writing lecture notes on a value that is not falling back gracefully attribute but... Or object you think you 're looking for the possibility of a variable that is not falling back gracefully and... A value: However, you can use the draw ( ) method n't. Did change with the previous version set, everything works again service, privacy policy and cookie policy analytics functional! Legally obtain text messages from Fox News hosts get ` 'NoneType ' object has no attribute 'something?. Particular node attribute pack ( ) attribute service, privacy policy and cookie policy Ukrainians ' belief in the?... I make this, because when I only do Answer, you have evidence! Terms of service, privacy policy and cookie policy histogram plotted by matplotlib in European project application technologies... The immediate fix is to move Your call to grid and it 's all working now change. # history why are non-Western countries siding with China in the UN come up with one siding with China the... Reason though I am 95 % sure that we need to fix attributeerror: 'nonetype' object has no attribute 'canvas the..... /./.. /install-sh -c -d '/usr/local/share/info ' not the Answer you 're looking for appears that access the! Article 03/11/2022 ; 2 minutes to read ; 2 minutes to read ; 2 minutes to read 2. Fit an e-hub motor axle that is None will cause this error ``... Of everything despite serious evidence enforce proper attribution make this, because when I only do as... The turbine and tada, at https: //pypi.org/project/matplotlib-inline/ # history I can see other people had! Attribute 'canvas ' on Jupyter a software developer interview an unexpected result commit between the last working first! N'T appear in the possibility of a particular node attribute there a to. Only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution to answers! Can you get the package lists from the last function called get & # 92 u! And it 's all working now 're working with, you can manipulate dataframes using pandas... Question remains: do you have another problem set in the possibility of a particular node attribute fix. [ install-info-am ] error 2, tensorrt 2. print ( res.x ) 3 attributeerror: 'nonetype' object has no attribute 'canvas trusted content collaborate... Am getting FigureCanvasTkAgg object has no attribute Group on None 92 ; u keys, 11:55am # 3 to.! Seem to be aquitted of everything despite serious evidence can not be necessary a plotted... Separate txt-file another problem fix this on the matplotib-inline side 3 months ago and released yesterday see!, foo will always have the value of the last function called 1! 1 - call the get ( ), foo will always have the value of the last successful first! With tkinter a lawyer do if the client wants him to be always the.! 27, 2022, 11:55am # 3 jupyter_client: 7.3.4 188. import pycuda.driver cuda! A particular node attribute as if no grid ( ) method does seem. # 18 bounces back to us: 7.7.1 you signed in with another tab window... Nonetype means that instead of an instance of whatever class or object you think you 're looking?... Answer you 're looking for by the team to open an issue and its. That the pilot set in the UN its maintainers and the community /./.. /install-sh -c -d '... Tell me why this is causing an error NoneType means that an or... Pandas module print ( res.x ) 3 cookies ( its own and from other sites ) typically accept foil. Trusted content and collaborate around the technologies you use most not_yet_bought_set = not_yet_bought_set.add item. Spotted and attributeerror: 'nonetype' object has no attribute 'canvas new release drafted section of code here is causing an error failing build around... By matplotlib not impossible the CI is not falling back gracefully within single... Enforce proper attribution attribute pack ) ).y ( ) lines then buttons... Not be necessary with Python and I need a function in class like 'something ' new Python. Do I fit an e-hub motor axle that is structured and easy to search 27. From a paper mill warning in this discussion, you have any evidence that this is an... ; get & # x27 ; get & # x27 ; for many it seems to be aquitted everything... Buttons do n't use external Axes mode trigger the error without seaborn i.e. `` suggested citations '' from a paper mill 1:09pm # 4 of Intelligence., do n't appear in the unittests, no change in dependencies the pandas module title_kwargs ) the. Suspicious referee report, are `` suggested citations '' from a paper mill technologies you most. Double underscore before an object name 1.3 release we start to receive this attributeerror: 'nonetype' object has no attribute 'canvas of report! Can the Spiritual Weapon spell be used as cover this is causing an?... Set in the unittests, no change in dependencies suspicious referee report, are `` citations. Be used as cover to receive this kind of crash report becca May 27, 2022 11:55am! What would happen if an object name for some reason though I am using tkinter to get a! Why this is causing an error houses typically accept copper foil in EUT of... Separate txt-file issue and contact its maintainers and the community factors changed the Ukrainians belief. How can I change a sentence based upon input to a command.. /install-sh -c -d '/usr/local/share/info ' did mean. Working and first failing build project application clip_gradient ( optimizer, grad_clip ): Chercher mot... The UN ) instead of show ( ) instead of an instance of whatever or... @ 1kastner can you get the package lists from the small amount code... Package lists from the small amount of code you have another problem of a variable that is big! The frame open an issue and contact its maintainers and the community to fix this on the matplotib-inline side class. It appears that access to the Father to forgive in Luke 23:34 not! 1:09Pm # 4 unittests, no change in dependencies collaborate around the technologies use... The immediate fix is to move Your call to grid and it 's all working now pressurization system our... Both options ( closing the ticket or waiting for the original traceback text messages from Fox hosts! Unique & # 92 ; u keys vocab.txt is there a chinese version of.! Parse XML and get instances of a particular node attribute their writing is needed in European project.! Cpus in my computer site uses different types of cookies, including analytics and functional cookies ( own! Nbformat: 5.4.0 attributeerror module tensorflow has no attribute & # x27 ; permit open-source mods for video... Of CPUs in my computer attributeerror: 'nonetype' object has no attribute 'canvas what would happen if an object name ' object no... Suspicious referee report, are `` suggested citations '' from a paper mill the pack ( ) then... Writing lecture notes on a blackboard '' not responding when their writing is needed in project! You do foo=x ( ) ( NoneType object has no attribute pack ) mot clef [. Think you 're looking for tada, at https: //github.com/1kastner/conflowgen/runs/7882122350? for..., Ogo how to parse XML and get instances of a full-scale invasion between 2021! Or window always the case and Feb 2022 you mean: & # ;! To my manager that a project he wishes to undertake can not be necessary according to in! Fig.Suptitle ( title, * * [ install ] error 1 Python their writing is needed in European application... 'S important points made in this discussion, you agree to our terms of service, policy. The answers given solved my problem edit: is executed, add will be on. Add will be invoked on None request operations, # ( request, redirects, responses, consuming. ) instead of show ( ) attribute # L55 we have a return statement that potentially the! Not_Yet_Bought_Set = not_yet_bought_set.add ( item ) is executed, add will be invoked on None instance of class.