The most Pythonic way to convert a list of floats fs to a list of strings is to use the one-liner fs = [str(x) for x in fs]. It iterates over all elements in the list fs using list comprehension and converts each list element x to a string value using the str(x) constructor. This … Read more
Problem Formulation Say, you’re me 👱♂️ five minutes ago, and you want to create a Matplotlib plot using the following (genius) code snippet: If you run this code, instead of the desired plot, you get the following TypeError: ‘AxesSubplot’ object is not subscriptable: 💬 Question: How to resolve the TypeError: ‘AxesSubplot’ object is not subscriptable … Read more
Best Solution to Print List Without Newline To print all values of a Python list without the trailing newline character or line break, pass the end=” argument in your print() function call. Python will then avoid adding a newline character after the printed output. For example, the expression print(*[1, 2, 3], end=”) will print without … Read more
Problem Formulation and Solution Overview This article will show you how to find DataFrame row indices in Python with NaN or Null (empty) values. To make it more interesting, we have the following scenario: Rivers Clothing has given you a CSV file that requires a clean-up to make it usable for Payroll and Data Analysis. … Read more
Problem Formulation 💬 How to print a list without quotes in Python? Given a Python list of strings such as [‘1’, ‘2’, ‘3’]. If you print the list to the shell using print([‘1’, ‘2’, ‘3’]), the output is enclosed in square brackets and the strings have quotes like so: “[‘1’, ‘2’, ‘3’]”. This article will … Read more
Use the tuple concatenation operation * with a tuple with one element (42,) as a right operand and the number of repetitions of this element as a left operand. For example, the expression (42,) * n creates the tuple (42, 42, 42, 42, 42) for n=5. Let’s play with an interactive code shell before you’ll … Read more
Use Python’s built-in min() function with a key argument to find the shortest string in a list. Call min(lst, key=len) to return the shortest string in lst using the built-in len() function to associate the weight of each string—the shortest string will be the minimum. Problem Formulation Given a Python list of strings. Find the … Read more
Problem Formulation and Solution Overview This article will show you how to convert a single Integer into a List in Python. Python has several built-in Data Type Structures: one of them being a List. The List Data Structure is made up of square brackets ([]) containing elements separated by a comma (,). These elements can … Read more
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
Problem Formulation and Solution Overview This article will show you how to access and retrieve tuple Elements from a List of Tuples in Python. 💡 Definition: Python Tuples are a type of Data Structure similar to Lists. However, Tuples are enclosed in round brackets () and are immutable, whereas Lists are enclosed in square brackets … Read more
💬 Question: How to convert a dictionary to a CSV in Python? In Python, convert a dictionary to a CSV file using the DictWriter() method from the csv module. The csv.DictWriter() method allows you to insert a dictionary-formatted row (keys=column names; values=row elements) into the CSV file using its DictWriter.writerow() method. 🌍 Learn More: If … Read more
Problem: How to convert a list of dictionaries to a csv file? Example: Given is a list of dicts—for example salary data of employees in a given company: Your goal is to write the content of the list of dicts into a comma-separated-values (CSV) file format. Your out file should look like this: my_file.csv: Name,Job,Salary … Read more