Attributeerror: dict object has no attribute has_key [SOLVED
This error message Attributeerror: dict object has no attribute has_key is telling you that you are trying to use the has_key method on a dictionary object. However, that method is …
Python AttributeError Reference: 170+ “Object has no attribute X” Fixes (2026)
itsourcecode.com hosts 170+ documented fixes for Python AttributeError messages: the most common runtime error after TypeError. From beginner-level confusion ('NoneType' object has no attribute 'split') to library-version pain (module 'numpy' has no attribute 'float' after NumPy 1.20+), this archive groups every documented error by root cause. Each post explains why the attribute is missing and gives 2-4 alternative fixes with code examples.
What is an AttributeError?
A Python AttributeError is raised when you try to access an attribute or method on an object that doesn’t have it. The error message always tells you both the object type and the missing attribute, for example AttributeError: 'list' object has no attribute 'items' means you called .items() on a list, but only dicts have that method. The error has two forms:
Instance form: 'X' object has no attribute 'Y', the value at runtime isn’t the type you expected
Module form: module 'X' has no attribute 'Y', the function/class you’re importing no longer exists in that version of the library
How to debug any AttributeError in 4 steps
Read both names in the error. The message gives you the object type AND the missing attribute. Note both, they tell you what’s wrong together.
Print the type of the object. Add print(type(x)) on the line before the error. If the error says 'NoneType' object has no attribute 'split', the value is actually None, usually because a function returned nothing when you expected a string.
If the error is “module X has no attribute Y”, check the library version. Run pip show to see installed version. Compare to the version that had the attribute, often the API was deprecated and renamed. Common offenders: NumPy (np.float, np.int, np.long removed in 1.20+), pandas (.ix removed in 1.0+), Keras (keras.optimizers.Adam moved), Selenium (find_element_by_id removed in 4.0+).
Check the import path. from numpy import float and numpy.float are different namespaces and different lookups. Many AttributeErrors come from a sub-package that moved or was renamed across versions.
Most common root causes (in order of frequency)
Value is None when you expected an object: function returned None, regex match failed, dict lookup returned None, BeautifulSoup didn’t find the element
Library version mismatch: API was deprecated and removed (numpy 1.20+, pandas 1.0+, Keras 2.x → tf.keras, Selenium 4)
Wrong type altogether: calling .items() on a list, .append() on a string, .read() on a dict
Python 2 → 3 migration: old code using dict.iteritems(), dict.has_key(), urllib.urlopen
Module re-org: imports from tensorflow.contrib (removed), keras.optimizers.Adam (moved to tf.keras.optimizers)
Typo in attribute name: beginners hit this most, especially when an IDE doesn’t autocomplete
Featured AttributeError fixes by type
🟢 Python built-in types: NoneType, str, list, dict, set, tuple
These errors come from runtime type confusion, your code expects one type but got another. Almost always fixable with a one-line type check or rewriting the previous line that returned the wrong value.
NoneType errors (14 posts): the most common AttributeError class. A function/method returned None when you expected a string, list, or object.
‘NoneType’ object has no attribute ‘split’
‘NoneType’ object has no attribute ‘strip’
‘NoneType’ object has no attribute ‘find’ (BeautifulSoup)
‘NoneType’ object has no attribute ‘text’
‘NoneType’ object has no attribute ‘cursor’ (database)
str errors (10 posts): calling list/dict methods on a string.
‘str’ object has no attribute ‘keys’
‘str’ object has no attribute ‘get’
‘str’ object has no attribute ‘append’
‘str’ object has no attribute ‘remove’
‘str’ object has no attribute ‘write’
‘str’ object has no attribute ‘decode’ (Python 3 migration)
list errors (10 posts): calling string/dict methods on a list.
‘list’ object has no attribute ‘items’
‘list’ object has no attribute ‘strip’, 2026 Guide
‘list’ object has no attribute ‘shape’, 2026 Guide
‘list’ object has no attribute ‘join’
dict errors (6 posts): Python 2 methods removed in Python 3.
‘dict’ object has no attribute ‘iteritems’ (Py3 migration)
‘dict’ object has no attribute ‘has_key’ (Py3 migration)
‘dict’ object has no attribute ‘add’, 2026 Guide
‘dict’ object has no attribute ‘read’
set, float, bytes errors
‘set’ object has no attribute ‘items’
‘float’ object has no attribute ‘split’
🐼 pandas (DataFrame, Series): 13 posts
pandas had multiple API breaks between 0.x → 1.x → 2.x. Old code using .ix, .append(), or older indexing methods raises AttributeError on modern pandas.
‘DataFrame’ object has no attribute ‘ix’ (use .loc / .iloc)
‘DataFrame’ object has no attribute ‘unique’
‘DataFrame’ object has no attribute ‘concat’
‘DataFrame’ object has no attribute ‘write’
‘DataFrame’ object has no attribute ‘_get_object_id’
‘DataFrame’ object has no attribute ‘withColumn’ (PySpark vs pandas)
‘Series’ object has no attribute ‘strftime’
‘Series’ object has no attribute ‘split’
Pandas .dt accessor with datetimelike values
module ‘pandas’ has no attribute ‘read_csv’
🔢 NumPy (module + ndarray): 16 posts
NumPy 1.20 deprecated and removed many type aliases (np.float, np.int, np.long, np.bool). Code from 2019 or earlier hits these errors immediately on modern NumPy.
module ‘numpy’ has no attribute ‘object’
module ‘numpy’ has no attribute ‘float’
module ‘numpy’ has no attribute ‘long’
module ‘numpy’ has no attribute ‘ndarray’, 2026 Guide
🤖 TensorFlow & Keras: 15 posts
TensorFlow 2.x reorganized the API: tensorflow.contrib was removed, optimizers moved into tf.keras.optimizers, and many sub-modules were merged or deprecated.
module ‘tensorflow.compat.v1’ has no attribute ‘contrib’
module ‘tensorflow’ has no attribute ‘set_random_seed’
module ‘keras.utils’ has no attribute ‘Sequence’
module ‘keras.optimizers’ has no attribute ‘Adam’
‘Tensor’ object has no attribute ‘numpy’
🔥 PyTorch & TorchText: 3 posts
module ‘torchtext.data’ has no attribute ‘Field’ (torchtext 0.9+)
module ‘torch._C’ has no attribute ‘_cuda_setDevice’
📈 Matplotlib (module-level): 2 posts
module ‘matplotlib’ has no attribute ‘plot’ (use pyplot)
module ‘matplotlib’ has no attribute ‘get_data_path’
‘AxesSubplot’ object has no attribute ‘savefig’
👁️ OpenCV (cv2): 2 posts
module ‘cv2’ has no attribute ‘xfeatures2d’ (need opencv-contrib)
module ‘cv2’ has no attribute ‘_registerMatType’
🕷️ Selenium WebDriver: 3 posts
Selenium 4 removed the find_element_by_* methods. Use find_element(By.X, ...) instead.
‘WebDriver’ object has no attribute ‘find_element_by_class_name’
module ‘selenium.webdriver’ has no attribute ‘PhantomJS’ (deprecated)
module ‘selenium.webdriver’ has no attribute ‘Opera’
⚙️ Standard library & misc modules
module ‘datetime’ has no attribute ‘now’
module ‘asyncio’ has no attribute ‘run’ (Python 3.7+)
module ‘collections’ has no attribute ‘Iterable’ (Py3.10+ moved to collections.abc)
module ‘urllib’ has no attribute ‘urlopen’ (Py3: use urllib.request)
AttributeError: __enter__ (context manager protocol)
module ‘h11’ has no attribute ‘Event’
‘entrypoints’ object has no attribute ‘get’
‘API’ object has no attribute ‘search’ (Tweepy)
2026 Updated Guides: featured AttributeError fixes
These guides were rewritten or expanded in 2026 with current library versions, minimal reproductions, and 3-4 alternative fixes each.
module ‘numpy’ has no attribute ‘ndarray’: NumPy 1.20+ migration
‘list’ object has no attribute ‘strip’: String method confusion
‘list’ object has no attribute ‘shape’: NumPy vs list confusion
‘dict’ object has no attribute ‘add’: set vs dict confusion
module ‘pandas’ has no attribute ‘read_csv’: shadowed import
‘DataFrame’ object has no attribute ‘ix’: pandas 1.0+ migration (use .loc / .iloc)
Pandas .dt accessor error: datetime column conversion
‘Tensor’ object has no attribute ‘numpy’: TensorFlow eager execution
‘WebDriver’ has no attribute ‘find_element_by_class_name’: Selenium 4 migration
module ‘asyncio’ has no attribute ‘run’: Python 3.7+ async
‘tensorflow.compat.v1’ has no attribute ‘contrib’: TF 2.x migration
‘set’ object has no attribute ‘items’: set vs dict
‘list’ object has no attribute ‘items’: list of dicts vs dict
AttributeError: __enter__: using with on non-context-manager
Related error categories
AttributeError is one of 10 hubs in our Python & JavaScript error reference cluster, 980+ documented fixes total. If your error isn’t about a missing attribute, jump to the right hub below:
TypeError Reference, 220+ Python & JS TypeError fixes
ModuleNotFoundError Reference, 198+ Python import errors
ValueError Reference, 100+ library-specific Python ValueError fixes
ImportError Reference, 67+ “cannot import name X from Y” fixes
NameError Reference, 49+ Python “name X is not defined” fixes
RuntimeError Reference, 49+ PyTorch CUDA, asyncio, Flask runtime errors
SyntaxError Reference, 48+ Python & JavaScript parsing errors
ReferenceError Reference, 34+ JavaScript “is not defined” fixes
HTTP Error Reference, 35+ HTTP status code fixes
Python Tutorial, beginner-to-intermediate Python lessons
About this AttributeError reference
This AttributeError reference has been built since 2015 by PIES Information Technology Solutions in Binalbagan, Negros Occidental, Philippines. Every post in the collection started as a real error encountered in production code, by us, by our clients, or by readers who emailed us with their tracebacks. Used by 12,000+ Python developers monthly across the Philippines, India, the United States, and beyond. If your AttributeError isn’t here, send the full traceback to our contact form and we’ll add it.
[Fixed 2026] AttributeError: List Object Has No Attribute Shape — Solutions
The “AttributeError: ‘list’ object has no attribute ‘shape’” is a Python error message that occurs when you try to access the “shape” attribute of a list object. In this article, …
Attributeerror: module ‘scipy’ has no attribute ‘stats’
It’s understandable to be frustrated when you encounter errors like attributeerror: module ‘scipy’ has no attribute ‘stats’ when you’re working on a Python project. But don’t worry, as in this article …
Attributeerror: module ‘numpy’ has no attribute ‘float’ [SOLVED]
The “attributeerror: module ‘numpy’ has no attribute ‘float’“ is an error message in Python while you are using numpy. It occurs when you are trying to use the float method …
Attributeerror: ‘dict’ object has no attribute ‘read’ [Solved]
In this article, we will deal with the error attributeerror: ‘dict’ object has no attribute ‘read’. We will look for solutions and discuss what is this error all about. Let’s …
attributeerror: ‘nonetype’ object has no attribute ‘group’
In this article, we will discuss this error in a detailed way and also provide solutions on how to solve the attributeerror: nonetype object has no attribute group. Why the …
Attributeerror: ‘dataframe’ object has no attribute ‘ix’ [SOLVED]
The Attributeerror: ‘dataframe’ object has no attribute ‘ix’ error occurs in Python’s Pandas package when attempting to use the “ix” attribute on a Pandas dataframe object. In this article, we …
Attributeerror: module ‘math’ has no attribute ‘dist’ [SOLVED]
The “attributeerror: module ‘math’ has no attribute ‘dist’“ typically occurs if you are using an outdated version of Python. This is because an older version of Python doesn’t have “dist” …
attributeerror: list object has no attribute lower
In this tutorial, we will discuss on how to solve the attributeerror: ‘list’ object has no attribute ‘lower’ and explain the solutions through step-by-step method. Before we proceed to the …
Attributeerror: ‘dict’ object has no attribute ‘append’
In this article, we will deal with the error attributeerror: ‘dict’ object has no attribute ‘append’. We will look for solutions and discuss what is this error all about. Let’ …
Attributeerror: ‘webdriver’ object has no attribute ‘find_element_by_class_name’
Getting an “AttributeError: ‘webdriver’ object has no attribute ‘find_element _by_class_name’” error when using the “find_element_by_class_name” method with a Selenium WebDriver object? Don’t worry, and read through the end of this …
Attributeerror: ‘dataframe’ object has no attribute ‘_jdf’ [SOLVED]
The “attributeerror: ‘dataframe’ object has no attribute ‘jdf’“ is an error message that occurs when you are trying to use the ‘_jdf’ method that the ‘dataframe’ object doesn’t have. If …
Attributeerror: ‘list’ object has no attribute ‘split’ [SOLVED]
![Attributeerror: list object has no attribute split [SOLVED]](https://itsourcecode.com/wp-content/uploads/2023/03/attributeerror-list-object-has-no-attribute-split-768x473.png)
We truly understand how frustrating it is to encounter errors like attributeerror: ‘list’ object has no attribute ‘split’ when we’re working on Python projects. But don’t worry, as in this article …
Frequently Asked Questions
What is the difference between AttributeError and TypeError?
AttributeError says "this object exists but does not have the attribute/method you tried to access." TypeError says "the value's type is wrong for this operation entirely." For example, None.split() raises AttributeError (NoneType has no .split); None + 5 raises TypeError (you cannot add NoneType to int). Both are runtime errors caused by Python's dynamic typing, but they fail at different points.
How do I fix "'NoneType' object has no attribute X"?
The variable is None when you expected it to be an object. Most common causes: (1) A function returned nothing (no return statement, or fell off the end of an if). (2) dict.get(key) when the key is not present (returns None by default). (3) BeautifulSoup's .find() returned None because the element does not exist. (4) A database query returned no rows. Fix by adding a None check: if x is not None: x.do_thing(), or fix the upstream code that is producing None.
Why does "module 'numpy' has no attribute 'float'" / 'int' / 'long' happen?
NumPy 1.20 (released January 2021) deprecated np.float, np.int, np.long, np.bool, and np.object. NumPy 1.24 (Dec 2022) removed them entirely. Replace them with: np.float64, np.int64, Python's built-in float/int/bool, or downgrade to NumPy < 1.20 if you cannot change the code.
Why does "DataFrame object has no attribute 'ix'" happen?
.ix was deprecated in pandas 0.20 and removed in 1.0 (January 2020). It was ambiguous because it accepted both labels and positions. Replace with .loc (label-based) or .iloc (integer position-based). For df.ix[5, 'col'], use df.loc[5, 'col'] if 5 is a row label, or df.iloc[5, df.columns.get_loc('col')] if 5 is a position.
Why does "object has no attribute 'iteritems' / 'has_key'" happen?
You are running Python 3 code that used Python 2 methods. In Python 3, dict.iteritems() became dict.items(), and dict.has_key(k) became k in dict. Run a Python 2 to 3 conversion with 2to3 tool, or manually update: for k, v in d.iteritems() becomes for k, v in d.items(); if d.has_key('x') becomes if 'x' in d.
Why does "WebDriver has no attribute find_element_by_class_name" happen?
Selenium 4 (October 2021) removed all the find_element_by_* methods. Replace driver.find_element_by_class_name('foo') with driver.find_element(By.CLASS_NAME, 'foo'). Do not forget from selenium.webdriver.common.by import By. The same applies to find_element_by_id, find_element_by_xpath, find_element_by_css_selector, etc.
Should I catch AttributeError with try/except?
Generally no, AttributeError usually indicates a real bug in your code (wrong type, wrong API). Catching it hides the bug. The legitimate exception is duck typing patterns where you genuinely want to handle "this might or might not have method X": try: x.close() except AttributeError: pass. But for normal code, fix the type mismatch instead of catching the error.
How often is this AttributeError reference updated?
New posts are added weekly as we encounter errors in real projects. Existing posts are revised every 6-12 months when major library versions ship (NumPy 2.x, pandas 2.x, Selenium 4 to 5, TensorFlow versions). This page was last refreshed in May 2026.