In Python, [::-1] means reversing a string, list, or any iterable with an ordering. For example: Output: This is the quick answer. However, reversing a list in Python used to be something I always had to look up as I never wanted to learn how it works. But now that I understand the mechanism, it […]
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Leaving code comments might sometimes help clarify your code. There are 3 unofficial comment types in Python. A “block comment”: An “inline comment”: A “multi-line” comment that misuses a docstring: Commenting Code in Python To add a comment in Python, use the hashtag operator # before starting to type the comment. Before digging into the
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To round numbers in Python, use the built-in round() function. For example, let’s round a floating-point number to its nearest integer value: Output: To round up or down, use the math module’s ceil() or floor() functions: In this guide, you will learn how to: How to Round to 2 Decimals in Python To specify how
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In Python, a FIFO queue is a linear data structure. It stores objects in a first in first out (FIFO) manner. For example, you can use the Queue class from the queue module as a thread-safe FIFO queue: Output: However, you could use a regular list as a FIFO queue as well. In this guide,
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To see where pip installs packages on your system, run the following command: And replace <package_name> with the actual name of the package. Example: NumPy Location For example, let’s see where NumPy is installed: Output: Here you can see that the location field says the package is installed at /usr/local/lib/python3.8/site-packages. The location obviously depends on
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To produce a range of letters (characters) in Python, you have to write a custom function that: Here is the code for creating a range of characters in Python: Output: This is the quick answer. Feel free to use this code in your project. However, to understand how it works, let’s build this function from
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To find the index of a list element in Python, use the built-in index() method. For example, let’s find the first string that equals “Bob” in a list of strings: To find the index of a character in a string, use the index() method on the string. For example, let’s find the first occurrence of
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To pick a random element from a list in Python, use the random module’s choice() method: Output (example): This provides you with a quick answer. However, there are other ways you can consider. Let’s take a deeper look at randomly picking elements from lists in Python. 6 Ways to Get Random Element from a List
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Python string comparison is possible using the comparison operators: ==, !=, <, >, <=, >=. For example: String Comparison in Python Python comes with a list of built-in comparison methods: ==, !=, <, >, <=, >=. You commonly see comparisons made between numeric types in Python. But you can compare strings just as well. As
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The ‘u’ in front of a string means the string is a Unicode string. A Unicode is a way for a string to represent more characters than a regular ASCII string can. In Python 2.x shell, you can see how for example a text written in Russian converts to a Unicode string with ‘u’ in
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