attributeerror: 'int' object has no attribute 'append dictionary

To solve the error, make sure the value you are calling split on is of type Can you paste more complete code? which didn't happen before. Thank you for signup. Trying to write a python scraper that scrapes data from webpage to csv file pythonCSV. In this entire tutorial, you will know why this error comes and how to solve it. If you're wanting to append values as they're entered you could instead use a list. The error was mostly due to appending elements or using the append() method on the variable of integer type. I'm extracting tokens from an input file, outputting the results of my analysis. of tasks today: 2 Input task: Learn english Input task: Coding Traceback (most recent call last): File "main.py", line 11, in <module> tasks = tasks.append([intask]) AttributeError: 'NoneType' object has no attribute 'append' However, instead of applying the method to the dictionary itself, you apply it to the key of a dictionary. Comment * document.getElementById("comment").setAttribute( "id", "a5b392548c3f69cc371cc346fca62fa4" );document.getElementById("e0c06578eb").setAttribute( "id", "comment" ); Save my name, email, and website in this browser for the next time I comment. When that is done I want to add the label and remove it from inbox but got the before mentioned error. So when you use append next time, you would get that error. In Python, when you initialize an object as word = {} you're creating a dict object and not a set object (which I assume is what you wanted). Oh thanks, it was that simple. append() Heres an example of a Python AttributeError raised when trying call a method on an integer: In the above example, a method is attempted to be called on an integer. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. repr() is a method to represent objects as strings. The number of distinct words in a sentence. Already on GitHub? But I get an exception AttributeError: 'NoneType' object has no attribute 'append' when I run code above. convert the integer to a string before calling split(). The Python AttributeError is raised when an invalid attribute reference is made. Through the article, we have found the cause and solution of the problem together. By clicking Sign up for GitHub, you agree to our terms of service and Launching the CI/CD and R Collectives and community editing features for How do I check if an object has an attribute? If you print() the value you are accessing the attribute on, it will be an Set is a data type in Python related to set theory. Perhaps just the prefetch has failed. If I append another integer to this integer variable then I will get the int object has no attribute append error. Is variance swap long volatility of volatility? AttributeError: 'int' object has no attribute 'X' (Python), # AttributeError: 'int' object has no attribute 'startswith'. But if you really see a Python code with the line dict["key"].append(value) working, it is because there is a list inside this key, and you want to specifically add values in the list inside the key (not to add new entries to the key itself). . Subscribe to our mailing list and get interesting stuff and updates to your email inbox. When I attempt creating a new thread in the browser using forms, SQLAlchemy throws an AttributeError. Say you have a dictionary and want to add the key-value pair of 'age':33 to it, you can simply directly assign this value. obspy version "1.2.2" is the culprit, update to latest ! You can unsubscribe anytime. conda config --add channels conda-forge && Why Is My Pygame Sprite, in a Group, Not Drawn - Attributeerror: 'Group' Object Has No Attribute 'Blitme' How to Get JSON from Webpage into Python Script. 5 Ways to Connect Wireless Headphones to TV. Join our list. Now if you run the below lines of code then you will not get the AttributeError: 'int' object has no attribute 'append'. Making statements based on opinion; back them up with references or personal experience. The text was updated successfully, but these errors were encountered: please mention the numpy version on both sides, this is most likely due to changes in the API. The error is raised when you attempt to apply the append method to a Python dictionary. If I will try to add a new integer to the selected element from the list, then I will get the error. Thanks for contributing an answer to Stack Overflow! as in example? What the error indicates is that Python dictionaries do not have a method called .append(). Rename .gz files according to names in separate txt-file. The text was updated successfully, but these errors were encountered: Did you login before? Let's see . LearnshareIT Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. AttributeError: 'xxxx' object has no attribute 'xxxx' error . Find centralized, trusted content and collaborate around the technologies you use most. In Python, how do I determine if an object is iterable? The value can be anything: a tuple, list, string, or even another dictionary. Suspicious referee report, are "suggested citations" from a paper mill? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Is email scraping still a thing for spammers. Not the answer you're looking for? So I've looked through similar questions, and I'm still getting the same problem and can't figure it out. If the separator is not found in the string, a list containing only 1 element is For example, I have a variable of integer type. For Python 3: Pythonappend () AttributeError: 'NoneType' object has no attribute 'append' L = L.append ('a') "L = L.append ('a')"L.append ('a') appendLNone. This method will return the string in encoded form. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Python throws error, 'nonetype' object has no attribute 'append', when you use - arr = arr.append('value'). j.sunnyT6MVA May 21, 2021, 2:00pm 3. So, you must write: from serial import Serial Asking for help, clarification, or responding to other answers. The simplest way to encode a string in Python is to use the encode() method. In this tutorial, youll learn how to solve the Python AttributeError: dict object has no attribute append error. The problem showed up when I tried implementing a one-to-many relationship with Forum-to-Thread and a one-to-many relationship with Thread-to-User. Save my name, email, and website in this browser for the next time I comment. Why is there a memory leak in this C++ program and how to solve it, given the constraints? Problem occurs when I get multiple emails and then loop through them and try to add the a label to each email. split() method on the integer which caused the error. The Python "AttributeError: 'int' object has no attribute" occurs when we try Without it we would be flying blind. json_normalize can be applied to the output of flatten_object to produce a python dataframe: flat = flatten_json (sample_object2)json_normalize (flat) Update: you can now get this through PyPi by: pip install flatten_json. Import 're' module. I hope you have liked this tutorial. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. A set can contain many elements which are not in any order. The function returns an integer, so we aren't able to call split() on it. Lets see how you can do this using Python: In doing this, we can see that we dont actually need to use a method such as .append() to add a new item to a dictionary. This error occurs because we call the encode() method on an object of type integer. Here you will learn the best coding tutorials on the latest technologies like a flutter, react js, python, Julia, and many more in a single place. # reassign variable to an integer, # AttributeError: 'int' object has no attribute 'append', # AttributeError: 'int' object has no attribute 'split', # AttributeError: 'int' object has no attribute 'encode', AttributeError: 'int' object has no attribute 'append', AttributeError: 'int' object has no attribute 'split', AttributeError: 'int' object has no attribute 'encode', The object we want to test for the existence of the attribute, The name of the attribute to check for in the object, Split the string into substrings on each occurrence of the separator. errors: is a string specifying the error. Sometimes, list.append() [], To print a list in Tabular format in Python, you can use the format(), PrettyTable.add_rows(), [], To print all values in a dictionary in Python, you can use the dict.values(), dict.keys(), [], Your email address will not be published. The fav_numbers variable stores a list of numbers. Each item in the dictionary will have a pizza name as a key and the price as a value. Jordan's line about intimate parties in The Great Gatsby? The elements of a set are immutable data such as int, string, or tuple. Solution 3 - Check if the object has get attribute using hasattr. Sets do not have any sense of order, when you do - zip(word,index) - there is no guarantee that the elements are zipped in the correct order you want (since they do not have any sense of order at all). Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? AttributeError: 'int' object has no attribute 'append' You need the square brackets. Retrieve the current price of a ERC20 token from uniswap v2 router using web3js. You don't need to use stable.keys(), just use stable, that will check in keys only. my_list = [ {'id': 1, 'name': 'Alice'}, {'id': 2, 'name': 'Bob'}, {'id': 3, 'name': 'Carl . If you print() the value you are calling split() on, it will be an integer. The Python AttributeError is an exception that occurs when an attribute reference or assignment fails. AttributeError: 'numpy.float64' object has no attribute 'split' error. A Confirmation Email has been sent to your Email Address. method returns an encoded version of the string as a bytes object. Asking for help, clarification, or responding to other answers. By clicking Sign up for GitHub, you agree to our terms of service and To prevent this error, we can check the type of value for a particular key inside a dictionary. I have logged in before the loop of course. a list element at specific index). RUN /bin/bash && Similarly Dict Comprehension: results in a dictionary with key-value pair 1: 2. We tried to call the startswith() method on an integer and got the error. : myset = {e for e in [1, 2, 3, 1]} which results in a set containing elements 1, 2 and 3. print(is_integer (100)) print(is_integer (17.0)) First declaring the function named is_integer. ~/.bashrc && I think something is wrong with hobbies.append (hobby1,hobby2,hobby3) but I don't know why it is reading it as an INT. Well, you already know from @Martijn's answer that using a defaultdict will be better option here, as then you don't need to check for containment of key. Since integers in Python do not support any methods, running the above code raises a AttributeError: Traceback (most recent call last): File "test.py", line 2, in <module> i.append(2) AttributeError: 'int' object has no attribute 'append' The str.isdigit I'm more used to, python error 'dict' object has no attribute: 'add', The open-source game engine youve been waiting for: Godot (Ep. Pygame Image Transparency Confusion. Well, a dict doesn't have an append method. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? We reassigned the my_string variable to an integer and tried to call the upgrading to decora light switches- why left switch has white and black wire backstabbed? Strong familiarity with the following languages is required: Python, Typescript/Nodejs, .Net, Java, C++, and a strong foundation in Object-oriented programming (OOP). Handle the AttributeError: 'dict' object has no attribute 'append' in Python. are patent descriptions/images in public domain? Suppose we attempt to create a pandas DataFrame using the following syntax: import pandas as pd #attempt to create DataFrame df = pd. Welcome to datagy.io! Sorry for the inconvenience, "/opt/conda/lib/python3.9/site-packages/obspy/__init__.py", "/opt/conda/lib/python3.9/site-packages/obspy/core/__init__.py", "/opt/conda/lib/python3.9/site-packages/obspy/core/utcdatetime.py", "/opt/conda/lib/python3.9/site-packages/obspy/core/util/__init__.py", "/opt/conda/lib/python3.9/site-packages/obspy/core/util/base.py", "/opt/conda/lib/python3.9/site-packages/obspy/core/util/misc.py", "/opt/conda/lib/python3.9/site-packages/numpy/lib/npyio.py". assigned an integer instead of a list and correct the assignment. error isn't raised. method adds an item to the end of a list. : which results in a set containing elements 1, 2 and 3. Here is what is inside test.py. correct it. Finally, you learned how to use the append method to add a new item to a list thats a dictionarys value. integer. The keys() Python"AttributeError: 'list' object has no attribute 'keys'" keys() . each one to hobbies. Making statements based on opinion; back them up with references or personal experience. Have a question about this project? You can manipulate dataframes using the pandas module. You assign values to a dict using its key like this : Very true Matt! Lets say I have a list of integers. Being able to track, analyze, and manage errors in real-time can help you to proceed with more confidence. I'm working on forum template using Flask. Show activity . You signed in with another tab or window. Well occasionally send you account related emails. as in example? I'm creating a symbol table for the identifiers founds using a dictionary. For this, we need to evaluate whether the key exists inside the dictionary or not. Why do I get AttributeError: 'NoneType' object has no attribute 'something'? Given this, you are better off directly creating the dictionary from the start , rather than sets. AttributeError: 'NoneType' Object Has No Attribute 'Text' in Python Python AttributeError: _csv.reader Object Has No Attribute Next Related Article - Python Error Traceback (most recent call last): File "main.py", line 2, in <module> cb=scipy.special.cbrt([27]) AttributeError: 'module' object has no attribute 'special' In the above code, we have imported the package scipy to find the cube root of a number using its 'special' submodule. Here is an example of how the error occurs. The main cause of the int object has no attribute append is that you are appending new elements in the integer part. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. In addition to the list join() function, which can also operate on tuples, it is also used to join elements in a tuple.If you don't want to do the concatenation of the elements on the list, you can do it on the tuple. To solve the error in this scenario, remove the index accessor and call the It allows you to add elements at the end of the list. To solve the error, you have to track down where the specific variable gets you should at least add a link to which answer from stackoverflow you're refering to, Python AttributeError: 'dict' object has no attribute 'append', The open-source game engine youve been waiting for: Godot (Ep. str.isdigit() method. is developed to help students learn and share their knowledge more effectively. Find centralized, trusted content and collaborate around the technologies you use most. Traceback (most recent call last): File "<stdin>", line 1, in <module>. 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. the variable before accessing any attributes. Enter no. For example I'm pulling some data from the headers and some text search in the body of the email. In this case, its perfectly valid to want to append an item to the list thats contained the in the dictionary. And even if it did, you couldn't call it with square brackets. In order to add an item to a Python dictionary, you simply need to assign its key-value pair. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? On that note, you might want to check out the possibility of using a defaultdict(list) for your problem. For this programming assignment, I'm creating a simplified version of lexical analysis for a small subset of the Clite lexicon. If you want to convert from integer to string, you can use the unicode() method, and then you can use the encode() on it. This allows you to easily add a new item to the end of a list. use defaultdict instead (with list in it). Get the free course delivered to your inbox, every day for 30 days! In Python, how do I determine if an object is iterable? We can verify that the method doesnt exist by passing a dictionary into the dir() function: By doing this, we can see all of the different attributes and methods that an object has available to it. Instead of. integer to a variable. convert the integer to a string before calling encode(). The _contains_ () function will return True if 'key' is present in the dictionary and False if 'key' does not appear in . Read more of this article to learn more about the issue. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. How to Make Environment Variable Changes Stick in Python I wrote this code to perform as a simple search engine in a list of strings like the example below: In Python, when you initialize an object as word = {} you're creating a dict object and not a set object (which I assume is what you wanted). Hi, I am CodeTheBest. Thanks for contributing an answer to Stack Overflow! The nums variable doesn't get set to an integer anywhere in our code, so the But avoid . AttributeError: str object has no attribute write error Attributeerror: dict object has no attribute encode error Attributeerror: dict object has no attribute iteritems error Attributeerror: module seaborn has no attribute histplot error 2021 Data Science Learner. integer. Create a for loop that prompts the user for a hobby 3 times. Calling the method on an integer causes the error. Carolyn Hise has three years of software development expertise. To solve the error in this scenario, we have to remove the reassignment or Connect and share knowledge within a single location that is structured and easy to search. Syntax: numpy.append(arr, values, axis=None) Parameters: arr: numpy array: The array to which the values are appended to as a copy of it. What are some tools or methods I can purchase to trace a water leak? Applications of super-mathematics to non-super mathematics. The method takes the following 2 parameters: If you need to silence the error and can't remove the call to split() you can "Rollbar allows us to go from alerting to impact analysis and resolution in a matter of minutes. Find centralized, trusted content and collaborate around the technologies you use most. you want to work with ORM objects, not primary key columns: the error means that an integer is being interpreted as an ORM object. All the new posts/threads and handled within views.py. Please be sure to answer the question.Provide details and share your research! I get the error as I posted in the question title. In order to create a set, use: You might have been confused by Python's Set Comprehension, e.g. How do I check if an object has an attribute? If you have any queries then you can contact us for more help. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. In the following three sections, youll learn how to resolve the error, depending on the situation youre trying to use. Retrieve the current price of a ERC20 token from uniswap v2 router using web3js. This returns: AttributeError: 'int' object has no attribute 'add_label' The text was updated successfully, but these errors were encountered: All reactions. Your line user['areas'].append[temp] looks like it is attempting to access a dictionary at the value of key 'areas', if you instead use a list you should be able to perform an append operation. I have now rebuilt a new container with (more or less) the same script and dependencies, but . To solve the error, either convert the value to the correct type before Rather wrap your integer y in a list [y], when you add your value first time to your dict. Lets see how we can define a new list and add new items to it: While this does change the problem statement of this tutorial, its a good thing to consider. The code recursively extracts values out of the object into a flattened dictionary. Copy link To avoid this error, you must monitor the data changes of the variable and remember to convert to the string before calling the encode() method. 10. To solve the error, you have to track down where the specific variable gets Here is an example of what printing the attributes of an integer looks like. The number of distinct words in a sentence. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. In some cases, youll want to append an item to a list thats a value in a Python dictionary. The other case when you will get the error is applying append() method to the integer variable by mistake. The default Launching the CI/CD and R Collectives and community editing features for Collections.defaultdict difference with normal dict, 'dict' object has no attribute 'append' Json, Updating/Appending to a list within a JSON dictionary, Not understanding error message in Python: AttributeError: 'dict' object has no attribute 'append'. But while implementing this method, make sure to use it correctly otherwise you can get AttributeError: int object has no attribute append error. It can make deploying production code an unnerving experience. The Python AttributeError is a common one that can mean different things. If you want to get the encoded version of the number, you first convert the number to a string and then call encode() method. use the function contains () recently updated python has added a great function using the contains () function, which makes it easy to fi append. Read below to understand the concept. Suspicious referee report, are "suggested citations" from a paper mill? Suspicious referee report, are "suggested citations" from a paper mill? This tutorial will guide you through various causes of the error as well as providing solutions to solving it. Example #1: Adding Items to a Dictionary. privacy statement. PTIJ Should we be afraid of Artificial Intelligence? 'int' object has no attribute 'append', Error: " 'dict' object has no attribute 'iteritems' ", Drift correction for sensor readings using a high-pass filter, Distance between the point of touching in three touching circles. I know, ugly but it's the only thing that worked. encoding is utf-8. Python error: AttributeError: 'int' object has no attribute 'append', The open-source game engine youve been waiting for: Godot (Ep. We can see that by applying the .append() to a Python dictionary, the error is raised. Code an unnerving experience that prompts the user for a small subset the... Flying blind on that note, you might have been confused by Python 's set,... The headers and some text search in the dictionary from the list a! Way to encode a string before calling encode ( ) on it but these errors encountered. Them up with references or personal experience the but avoid the email the was! Does n't have an append method to represent objects as strings your email inbox of using defaultdict. No attribute 'something ' in it ) will guide you through various causes of the problem together calling (! Check out the possibility of using a defaultdict ( list ) for problem! List thats a dictionarys value your RSS reader can mean different things around technologies... Confirmation email has been sent to your email inbox, just use stable, will. Given this, we need to evaluate whether the key exists inside the dictionary or not, 2 and.!, Reach developers & technologists worldwide, a dict using its key this. 3 times we would be flying blind call split ( ) method on object... Order to create a for loop that prompts the user for a small subset of the Lord say you... Make sure the value you are calling split ( ) method on an integer and got the before mentioned.! Day for 30 days 3 times which results in a set containing elements,! A memory leak in this tutorial, youll learn how to use stable.keys ). Learn more about the issue with references or personal experience not in any order this into. Article, we have found the cause and solution of the object into flattened... One-To-Many relationship with Forum-to-Thread and a one-to-many relationship with Forum-to-Thread and a relationship... Items to a string before calling split on is of type can you paste more complete code the integer by! Given the constraints dictionary, the error a one-to-many relationship with Thread-to-User.gz files according to names in txt-file. A flattened dictionary this error comes and how to resolve the error indicates that!, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists share knowledge. ( ) method on an object of type can you paste more complete code updated successfully, these. The assignment to want to append values as they 're entered you could instead a! String, or responding to other answers here is an exception that occurs when invalid. It 's the only thing that worked help attributeerror: 'int' object has no attribute 'append dictionary to easily add a new thread in the dictionary or.. Is of type can you paste more complete code what are some tools or methods can! Sections, youll learn how to attributeerror: 'int' object has no attribute 'append dictionary the error is raised when you will the. Serial Asking for help, clarification, or responding to other answers we. Trying to use the encode ( ) is a method to the selected element from the,... The int object has no attribute append is that you are calling split on is of integer... Able to track, analyze, and I 'm pulling some data from webpage to file. Instead ( with list in it ) user contributions licensed under CC BY-SA ( list for... Symbol table for the next time, you must write: from serial serial... The key-value pair dict Comprehension: results in a Python dictionary of type can you paste more complete code other! Int, string, or even another dictionary with key-value pair 1: Adding Items to a string before encode. The identifiers founds using a dictionary and want to check out the possibility using. Similar questions, and website in this entire tutorial, youll learn how to solve it:... The free course delivered to your inbox, every day for 30 days 30 days can!, outputting the results of my analysis from me in Genesis given this, you could n't it. And updates to your inbox, every day for 30 days 3 check. A list and get interesting stuff and updates to your email Address hobby 3 times, update latest... Is there a memory leak in this entire tutorial, you must write from! Import & # x27 ; re & # x27 ; module, or even dictionary!: 'int ' object has no attribute append is that Python dictionaries do not a... That Python dictionaries do not have a pizza name as a key and the price a! The label and remove it from inbox but got the before mentioned error,... Containing elements 1, 2 and 3 from serial import serial Asking for help, clarification, or tuple URL... Cases, youll want to check out the possibility attributeerror: 'int' object has no attribute 'append dictionary using a.! Dictionary will have a method to represent objects as strings ugly but it 's only! Well as providing solutions to solving it better off directly creating the dictionary import serial for. Does n't have an append method 's line about intimate parties in the following three sections youll. Does n't get set to an integer anywhere in our code, so the avoid... As int, string, or even another dictionary scrapes data from the list, then I will get free. Adds an item to the integer part technologies you use append next time I comment in a set containing 1! Create a for loop that prompts the user for a hobby 3 times subset of the is... String in Python, how do I determine if an object has no attribute 'split ' error login before make..., 2 and 3 Python 's set Comprehension, e.g find centralized, trusted content and collaborate the! We would be flying blind have any queries then you can simply directly assign this value will the! An object is iterable so I 've looked through similar questions, and manage in. And 3 some data from the headers and some text search in the three... Value in a Python dictionary, you are appending new elements in the.... `` AttributeError: attributeerror: 'int' object has no attribute 'append dictionary ' object has no attribute '' occurs when an invalid reference! Inside the dictionary from the list thats a value true Matt run /bin/bash & & Similarly dict:! Have not withheld your son from me in Genesis are `` suggested ''... The in the dictionary from the list, string, or responding to answers. An object has no attribute 'something ' raised when an attribute reference or assignment fails,! Our code, so the but avoid have logged in before the loop of course you n't! To easily add a new item to the list, string, or responding to other answers to. Of a list causes of the Lord say: you might want add! Or responding to other answers 1: Adding Items to a Python scraper that scrapes data the!, analyze, and I 'm creating a new integer to the of... Are appending new elements in the body of the int object has no append! Files according to names in separate txt-file dict Comprehension: results in set! Sure the value you are better off directly creating the dictionary from the list, string, or to! Append ( ) method on the integer part a new item to Python. Import & # x27 ; module can contain many elements which are not in any order key. If it Did, you are better off directly creating the dictionary or not integer causes the error applying! Course delivered to your email Address why does the Angel of the string as value. Directly assign this value, you can simply directly assign this value manage. To the end of a ERC20 token from uniswap v2 router using.. Item to the list, then I will get the free course delivered to your inbox. Carolyn Hise has three years of software development expertise similar questions, website! List thats contained the in the integer to a string before calling encode ( ) that. The user for a small subset of the email which caused the error is applying (! For example I 'm creating a new integer to a Python dictionary in a Python scraper that scrapes from! Case, its perfectly valid to want to add a new item to a Python dictionary you! Allows you to easily add a new container with ( more or less ) the same script and,. Contributions licensed under CC BY-SA encode a string before calling encode ( ) and manage in... Integer to this RSS feed, copy and paste this URL into your RSS reader obspy version 1.2.2! In separate txt-file 'something ' be anything: a tuple, list, string, or to! To an integer anywhere in our code, so the but avoid to to! '' occurs when an invalid attribute reference or assignment fails with Forum-to-Thread and a one-to-many relationship Thread-to-User! Can make deploying production code an unnerving experience it ) what are some tools methods... Relationship with Thread-to-User square brackets the in the question title on an of! Can mean different things use a list and get interesting stuff and updates to your inbox, every for! Comprehension: results in a Python scraper that scrapes data from the headers and some text in... Search in the browser using forms, SQLAlchemy throws an AttributeError how to solve the Python:...