Tuples, Strings, and Lists Before we look at creating tuples, as a starting point it would be useful to clarify the meaning of the various terms we will be using throughout this article: A string is a sequence of characters, and represents one of the main Python data types. A list is used to store … Read more
✯ Overview Problem: Fixing TypeError: list indices must be integers or slices, not str in Python. Example: The following code lists a certain number of transactions entered by the user. Output: Solution: Please go through this solution only after you have gone through the scenarios mentioned below. Bugs like these can be really frustrating! ? But, … Read more
Problem Formulation: How to Remove a Directory in Python? The rm command in Linux removes a specific directory. You can also add the options -r remove the directory recursively -f ignore nonexistent files and arguments and don’t prompt the user to ask for confirmation So, if you run rm -rf my_directory, it’ll forcefully remove my_directory … Read more
[Reading time: 9 minutes] Graphs are everywhere. They are used in social networks, the world wide web, biological networks, semantic web, product recommendation engines, mapping services, blockchains, and Bitcoin flow analyses. Furthermore, they’re used to define the flow of computation of software programs, to represent communication networks in distributed systems, and to represent data relationships … Read more
Problem Formulation Given an integer number n. Given an initial string value s. How to create an array of n copies of s in Python? # Input: n = 5 s = ” # Output: [”, ”, ”, ”, ”] Method 1: List Multiplication Python doesn’t have a built-in array type. The equivalent of an … Read more
✯ Overview Problem: Fixing TypeError: Can’t Multiply Sequence by non-int of Type ‘float’ in Python. Example: Consider that you want to calculate the circumference of a circle using the radius entered by the user, as shown below. As you can see above, we encountered a TypeError while executing our code. Bugs like these can be … Read more
This article compiles for you the 15 best cheat sheets in the web that help you get started with machine learning. If you’re short on time, here are the 15 direct PDF links (open in a new tab): Each cheat sheet link points directly to the PDF file. So don’t lose any more time, and … Read more
This article is contributed by our friendly AI from InferKit that uses a deep neural network to generate text automatically. I (human) guided the AI by proposing different subheadings that may be of interest to the reader. Surprisingly, there are many unique perspectives in the article—and some totally wrong “facts”. So, enjoy this fascinating demonstration … Read more
Problem Formulation Say, you use the re.split(pattern, string) function to split a string on all occurrences of a given pattern. If the pattern appears at the beginning or the end of the string, the resulting split list will contain empty strings. How to get rid of the empty strings automatically? Here’s an example: Note the … Read more
Problem Formulation You create images in the Tag Image File Format (TIFF). You want to add custom metadata to the image such as the location or other context information important for post-processing. How can you accomplish this? Solution Install and import the library tiffile. Use the tiffile.imsave() function to store the file at a given … Read more
While refactoring my Python code, I thought of the following question. Can You Use a Regular Expression with the Python endswith() Method? The simple answer is no because if you can use a regex, you won’t even need endswith()! Instead, use the re.match(regex, string) function from the re module. For example, re.match(“^.*(coffee|cafe)$”, tweet) checks whether … Read more
Problem Formulation: Replacing One Element Given List lst Element x Index i How to replace the element at index i in the list lst with the new element x? Solution Indexing You use simple indexing using the square bracket notation lst[i] = x to replace the element at index i in list lst with the … Read more