Use Python’s built-in max() function with a key argument to find the longest string in a list. Call max(lst, key=len) to return the longest string in lst using the built-in len() function to associate the weight of each string—the longest string will be the maximum. Problem Formulation Given a Python list of strings. Find the … Read more
If you get a binary input of tabular structured data, you can convert it to CSV easily by using str(byte)[2:-1] slicing to get rid of the b’…’ byte wrapper and apply string.replace(‘\t’, ‘,’) on the result to replace tabular characters with commas. Problem Formulation For example, say you have the following bytes format in your … Read more
In this article, we will cover some of the ways to clean up your data and make it easier to read and access using the built-in Python pprint module. Remember, your machine is very efficient with your data, but it doesn’t care how that data appears to the human eye. So let’s learn how to … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to convert a List of Booleans to Integers. In Python, the Boolean is a built-in data type. These values represent True (1) or False (0). Also referred to as Truthy or Falsy values. In this article, we will articulate how these values behave. To … Read more
Problem Formulation Given a Python string: 💬 Question: How to convert the string to a CSV file in Python? The desired output is the CSV file: ‘my_file.csv’: a,b,c 1,2,3 9,8,7 Simple Vanilla Python Solution To convert a multi-line string with comma-separated values to a CSV file in Python, simply write the string in a file … Read more
Problem Formulation 💬 Question: Given a Python list stored in a variable lst. How to remove the first and last elements from the list lst? Example: The list [‘Alice’, ‘Bob’, ‘Carl’, ‘Dave’] stored in variable lst becomes [‘Bob’, ‘Carl’]. Method 1: Slicing List[1:-1] To remove the first and last elements from a Python list, use … Read more
The TypeError: unhashable type: ‘list’ usually occurs when you try to use a list object as a set element or dictionary key and Python internally passes the unhashable list into the hash() function. But as lists are mutable objects, they do not have a fixed hash value. The easiest way to fix this error is … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to find the 2nd largest List element in Python. To make it more fun, we have the following running scenario: Rivers Clothing is currently reviewing its projected earnings for the next six (6) months. As their IT Specialist, you saved this data in a … Read more
Summary: You can convert a string to binary in Python using: bytearray() + bin() map() + bin() + bytearray() join() + format() + bytearray() join() + format() + ord() binascii.hexlify() Problem: How to convert a given string to its binary equivalent in Python? Example: When you convert a string to binary, it either results in … Read more
Summary: The most pythonic approach to add two lists element-wise is to use zip() to pair the elements at the same positions in both lists and then add the two elements. Here’s a quick look at the solution: [x + y for x, y in zip(li_1, li_2)]. An alternate proposition to this without using zip: … Read more
💬 Question: Say you have an expression you want to execute using the exec() function. How to store the result of the expression in a Python variable my_result? Before I show you the solution, let’s quickly recap the exec() function: Recap Python exec() Python’s exec() function executes the Python code you pass as a string … Read more
Problem Formulation: Given a float number. How to round the float down in Python? Here are some examples of what you want to accomplish: Solution: If you have little time, here’s the most straightforward answer: To round a positive or negative number x down in Python, apply integer division // to x and divide by … Read more