Python TypeError: cannot unpack non-iterable NoneType object Solution
Python sequences can be unpacked. This means you can assign the contents of a sequence to multiple variables. If you try to unpack a None value using this syntax, you’ll encounter the “TypeError: cannot unpack non-iterable NoneType object” error. In…
Python ValueError: max() arg is an empty sequence Solution
The max() method only works if you pass a sequence with at least one value into the method. If you try to find the largest item in an empty list, you’ll encounter the error “ValueError: max() arg is an empty…
Python typeerror: ‘tuple’ object does not support item assignment Solution
Tuples are immutable objects. “Immutable” means you cannot change the values inside a tuple. You can only remove them. If you try to assign a new value to an item in a variable, you’ll encounter the “typeerror: ‘tuple’ object does…
Python: Initialize List of Size N
You cannot assign items to a list at positions that do not exist. This is because lists are indexed from zero and new index positions increment by one each time an item is added to a list. This means if…
Python TypeError: unhashable type: ‘list’ Solution
Python dictionaries only accept hashable data types as a key in a dictionary. A list is not a hashable data type. If you specify a list as a key in a dictionary, you’ll encounter a “TypeError: unhashable type: ‘list’” error.…
Python IndentationError: unexpected indent Solution
IndentationErrors serve two purposes: they help make your code more readable and ensure the Python interpreter correctly understands your code. If you add in an additional space or tab where one is not needed, you’ll encounter an “IndentationError: unexpected indent”…
Python TypeError: ‘nonetype’ object is not callable Solution
Objects with the value None cannot be called. This is because None values are not associated with a function. If you try to call an object with the value None, you’ll encounter the error “TypeError: 'nonetype' object is not callable”.…
Python IndentationError: expected an indented block Solution
Python indentation is a stickler. You must correctly indent your code. If you use the wrong arrangement of spaces and tabs in a Python program, you encounter the “IndentationError: expected an indented block” error. In this guide, we talk about…
Python TypeError: object() takes no arguments Solution
The arguments a class object accepts are passed through a function called __init__(). If you misspell this function in your class declaration, you’ll encounter a “TypeError: object() takes no arguments” error when you run your code. In this guide, we…
Python TypeError: ‘float’ object cannot be interpreted as an integer Solution
Python has two data types that represent numbers: floats and integers. These data types have distinct properties. If you try to use a float with a function that only supports integers, like the range() function, you’ll encounter the “TypeError: ‘float’…
Python TypeError: ‘method’ object is not subscriptable Solution
Arguments in Python methods must be specified within parentheses. This is because functions and methods both use parentheses to tell if they are being called. If you use square brackets to call a method, you’ll encounter an “TypeError: ‘method’ object…
Python TypeError: can only join an iterable Solution
The join() method lets you transform an iterable object such as a list into a string. It is the opposite of the split() method. If you try to use this method to join a value that is not an iterable…
Python SyntaxError: can’t assign to function call Solution
To assign the result of a function to a variable, you must specify the variable name, followed by an equals sign, followed by the function you want to call. If you do not follow this order, you’ll encounter a “SyntaxError:…
Python typeerror: ‘list’ object is not callable Solution
When you try to access items in a list using curly brackets ( () ), Python returns an error. This is because Python thinks that you are trying to call a function. In this guide, we talk about the Python…
URL vs. URI: A Guide
The Internet is powered by acronyms. There’s HTTP which allows clients and servers to connect with each other and there’s SSL which is used to keep data secure. If you’ve spent any time working as a web developer, you’ve likely…
What is a Markup Language?
When we talk about markup languages in programming, we don’t mean that someone is trying to raise the price of something. A markup is not a price increase. It’s a way of representing data using a particular type of scripting…
Python TypeError: ‘builtin_function_or_method’ object is not subscriptable Solution
To call a built-in function, you need to use parentheses. Parentheses distinguish function calls from other operations that can be performed on some objects, like indexing. If you try to use square brackets to call a built-in function, you’ll encounter…
Python TypeError: ‘NoneType’ object is not subscriptable Solution
Python objects with the value None cannot be accessed using indexing. This is because None values do not contain data with index numbers. If you try to access an item from a None value using indexing, you encounter a “TypeError:…
Python TypeError: list indices must be integers, not tuple Solution
Lists are indexed using numbers. This means if you want to access an item from a list, you have to refer to its index position. If you specify a tuple as a list index value, you encounter the “TypeError: list…
Python: Read Text File into List
Storing data in files lets you keep a record of the data with which a program is working. This means you don’t have to generate data over again when working with a program. You just read that data from a…
Python TypeError: object of type ‘NoneType’ has no len() Solution
The len() method only works on iterable objects such as strings, lists, and dictionaries. This is because iterable objects contain sequences of values. If you try to use the len() method on a None value, you’ll encounter the error “TypeError:…
Python TypeError: can only concatenate list (not “int”) to list Solution
Lists can be concatenated to other lists. This means you can add the contents of one list to another list. Values with other data types, such as integers, cannot be concatenated to a list. If you try to concatenate an…
Python typeerror: ‘float’ object is not subscriptable Solution
Values inside a float cannot be accessed using indexing syntax. This means that you cannot retrieve an individual number from a float. Otherwise, you’ll encounter a “typeerror: ‘float’ object is not subscriptable” in your program. In this guide, we talk…
What Is a Database Schema?
In this guide, we’re going to talk about what a database schema is and why they are used. We’ll also walk through an example so you can see what developers mean when they are talking about a database schema. As…
Analytical Skills for Your Resume
If you’re reading over a description for a job, you may have come across a requirement such as “Possesses strong analytical skills.” This may leave you wondering: what are analytical skills, and how can I showcase them on my resume?…
STAR Interview Method: Ace Your Next Interview
You are in a job interview and you have been doing well so far. Then, as you start to build up your confidence, the interviewer puts you on the spot: “Tell me about a time when…” This type of question…
How to Use JavaScript Functions: A Step-By-Step Guide
JavaScript functions are custom blocks of code that can be reused. Functions allow code to be more modular and are essential to object-oriented programming. Functions can be defined through declarations or expressions. If you’re trying to learn JavaScript and looking…
Python TypeError: ‘float’ object is not callable Solution
Floating-point values are not callable. This is because floating points store numerical values. They are not functions that return a particular value when called. If you try to call a floating-point value as if it were a function, you encounter…
Python TypeError: can’t multiply sequence by non-int of type ‘str’ Solution
You can multiply two numbers together in Python. You can also multiply a number by a string. This returns a sequence of a string that repeats a specific number of times. If you try to multiply a string by another…
Python valueerror: could not convert string to float Solution
Python can only convert a valid numerical value to a floating point value. If you try to convert a value that contains a comma, spaces, or certain characters, you encounter an error that says “valueerror: could not convert string to…
