Programmers need to know how to manipulate strings for a variety of purposes, regardless of the programming language they are working in. This article will explain the various methods used to manipulate strings in Python.
This article will take a look at the various methods of manipulating strings, covering things from basic methods to regular expressions in Python. String manipulation is a skill that every Python programmer should be familiar with.
The most basic way to manipulate strings is through the methods that are build into them. We can perform a limited number of tasks to strings through these methods. Open up the Python interactive interpreter. Let's create a string and play around with it a bit.
>>> test = 'This is just a simple string.'
Let's take a fast detour and use the len function. It can be used to find the length of a string. I'm not sure why it's a function rather than a method, but that's a whole nother issue:
>>> len ( test ) 29
All right, now let's get back to those methods I was talking about. Let's take our string and replace a word using the replace method:
>>> test = test.replace ( 'simple', 'short' ) >>> testa 'This is just a short string.'
Now let's count the number of times a given word, or, in this case, character, appears in a string: