There is no built-in function to reverse a String in Python. The fastest (and easiest?) way is to use a slice that steps backwards,-1. ExampleGet your own Python Server Reverse the string "Hello World": txt ="Hello World"[::-1] ...
In this tutorial, you'll learn how to remove or replace a string or substring. You'll go from the basic string method .replace() all the way up to a multi-layer regex pattern using the sub() function from Python's re module.
So to reference an element of a two-dimensional array, the first parameter is the row that you are referencing and the second parameter is the column you are referencing. So array2[1][3] would be referencing the element of the index of row 1, column 3 (the 2nd row and the fourth co...
Next, using the story from the previous example, we’ll demonstrate how to count the number of times a word appears in a text file. Sometimes a text file contains many instances of a word or phrase. With Python, it’s possible to count how many times a string occurred in a text docum...
Use the while Loop to Loop Over a String in Python The while loop is used just like the for loop for a given set of statements until a given condition is True. We provide the string’s length using the len() function for iterating over a string. In the while loop, the upper limit...
In Python, we can use the datetime.strptime() method to convert a string to a datetime object. The strptime() method takes two arguments: the string to be converted and a format string specifying the input string's format. The format string uses a combination of formatting codes to represen...
Python def get_and_save_middle(data, fname): middle = data[len(data)//3:2*len(data)//3] save_to_file(middle, fname) return middle This function saves and returns the middle third of a string. You don’t need to finish implementing save_to_file() before you can test the outp...
Use the extend() Function to Split a String Into a Char Array in PythonThe extend() function adds elements from an iterable object like a list, a tuple, and more to the end of a given list. Refer to this article to know more about the difference between the extend() and append() ...
Example of using str() in Python to Convert an Int to a String Now that we know there is a function we can use in Python to convert an int to a string let us put it to use. For this example, we will create a simple variable called “x” and assign it the value314. ...
What does Call By Value and Call By Reference in Python Mean? In several programming languages, you can pass the data to the function argument in two ways: by value and reference (address). Calling by valuemeans passing the value to the function’s argument; if any changes are made to ...