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The square of a number results from multiplying a number by itself. The square of the number is the same as raising the number to the power of two. For example $latex 8 \times 8 = 64$, which is equal to $latex 8^{2}$ as well. The square of real numbers is always...

In Python, a dictionary is stores data in key:value pairs. Python 3.7 dictionaries are ordered data collections; in Python 3.6 and previous dictionaries are unordered. You cannot perform a slice on a Python dictionary like a list. Dictionaries can have custom key...

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In Python, we index lists with numbers. To access an item from a list, you must refer to its index position using square brackets []. Using a tuple instead of a number as a list index value will raise the error "TypeError: list indices must be integers, not tuple"....

A Python dictionary is a collection of data values stored in key-value pairs. To access items in a dictionary, you must use the indexing syntax of square brackets [] with the index position. If you use parentheses, you will raise the "TypeError: 'dict' object is not...

Function calls and variable assignments are distinct operations in Python. Variable assignments are helpful for code structure, and function calls help reuse code blocks. To assign the result of a function to a variable, you must specify the variable name followed by...

Functions are blocks of code that work and behave together under a name. Built-in functions have their functionality predefined. To call a built-in function, you need to use parentheses (). If you do not use parentheses, the Python interpreter cannot distinguish...

We need to instantiate or call classes in Python before accessing their methods. If we try to access a class method by calling only the class name, we will raise the error "missing 1 required positional argument: ‘self'". This tutorial will go through the definition...

When calling a method in Python, you have to use parentheses (). If you use square brackets [], you will raise the error "TypeError: 'method' object is not subscriptable". This tutorial will describe in detail what the error means. We will explore an example scenario...