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
(Reading time: 19 minutes) The purpose of this article is to help you refresh your knowledge of all the basic Python keywords, data structures, and fundamentals. I wrote it for the intermediate Python programmer who wants to reach the next level of programming expertise. The way of achieving an expert level is through studying the … Read more
A not-so-fictious problem: Say, you’ve created a web application that runs on a dedicated Linux server in the cloud. Thousands of users visit your web app and suddenly … it crashes. Your users start complaining, and you lose revenue. More importantly, you bleed credibility by the hour. Your server is down, so what do you … 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
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
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
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
Problem Formulation and Solution Overview In this article, you’ll learn how to check the Data Types of a Pandas Series. A Series is a 1D (one-dimensional) array. This Series can be of various data types, such as an integer, a string, a float or even an object! A good practice is to ensure, before performing … 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
The easiest way to convert a tab-delimited values (TSV) file to a comma-separated values (CSV) file is to use the following three lines of code: import pandas as pd df = pd.read_csv(‘my_file.txt’, sep=’\t’, header=None) df.to_csv(‘my_file.csv’, header=None) We’ll explain this and other approaches in more detail next—scroll down to Method 3 for this exact method. Problem … Read more
To export/convert a Pandas DataFrame to a CSV file, use the Pandas method to_csv(). Set the index=False argument if you don’t want the first column to be the index number in the CSV, which is usually the case. Let’s dive into a simple two-step example on how to convert a DataFrame to a CSV easily … 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