String methods in python

Become a master of common Python string methods and level up your data manipulation skills! Python strings have a lot of functionality that you can leverage in your scripts. This includes common text operations like searching and replacing text, removing whitespace, or counting characters and words. Collectively, these functions are called Python string methods. In this article, we’ll go through an overview of the main string methods available for Python scripts. If you want to do a deeper dive into Python string methods, check out our course But Wait – What Are Python String Methods Again? Methods work much like plain old functions, but they are associated with a specific data type (e.g. integers, strings, or lists). You can think of methods as specialized functions that are designed to work with that particular type of data. An important distinction between methods and functions is how to execute them. For regular functions, you simply use parentheses to execute it: result = some_function(argument1, argument2) Methods, on the other hand, must be accessed and executed from a variable. You do this by adding a period between the variable and the method name: result = some_variable.some_method(argument1, argument2) Notice the period before some_method? This indicates that we are using a method. The data type of some_variable determines which methods are available. Here’s a concrete example. We’ll define the variable name (a string) and then call the lower() method: name = "J...

• Login • Category • Java • JSP • iOS • HTML • Android • Python • C Programming • C++ Programming • C# • PHP • CSS • Javascript • jQuery • SAP • SAP HANA • Data Structure • RDBMS • MySQL • Mathematics • 8085 Microprocessor • Operating System • Digital Electronics • Analysis of Algorithms • Mobile Development • Front End • Web Development • Selenium • MongoDB • Computer Network • General Topics Python provides lots of built-in methods which we can use on strings. Below are the list of string methods available in Python 3. Method Description Examples capitalize() Returns a copy of the string with its first character capitalized and the rest lowercased. >>> mystring = "hello python">>> print(mystring.capitalize()) Hello python Casefold() Returns a casefolded copy of the string. Casefolded strings may be used for caseless matching. >>> mystring = "hello PYTHON">>> print(mystring.casefold()) hello python Center(width, [fillchar]) Returns the string centered in a string of length width. Padding can be done using the specified fillchar (the default padding uses an ASCII space). The original string is returned if width is less than or equal to len(s) >>> mystring = "Hello">>> x = mystring.center(12, "-") >>> print(x) ---Hello---- Count(sub, [start], [end]) Returns the number of non-overlapping occurrences of substring ( sub) in the range [ start, end]. Optional arguments startand end are interpreted as in slice notation. >>> mystr = "Hello Python">>> print(mystr.count("o")) 2 >>> ...

Just for completeness as nobody else has mentioned it. The third parameter to an array slice is a step. So reversing a string is as simple as: some_string[::-1] Or selecting alternate characters would be: "H-e-l-l-o- -W-o-r-l-d"[::2] # outputs "Hello World" The ability to step forwards and backwards through the string maintains consistency with being able to array slice from the start or end. I think it's more likely you wanted to mention the third parameter to slice. Needing to get every other character from a string may be an important use case somewhere, but I've never had to do it. Not that there's anything wrong with wanting to show off what you know -- what's the point of knowing things if you can't do that. :) But the case for relevance to the question is overstated. Sure, the specific example of selecting alternate characters may not be relevant to the question, but understanding there is a 3rd parameter to slicing very much is relevant and the simple examples serve to illustrate how it works. The Python community also has a great history of educating new members in a friendly way :-) It is clear that if you put some_string[::-1] you got back, the string in reverse order. However, I really don't understand what you do in this case with the other numbers? Ex.: test_string[5:1:-1] - will result a totally different way that I expect. How the first and second numbers will effect the string if the third number is "-1" ? Substr() normally (i.e. PHP and Perl) works this w...

In this article, you’ll learn about the special methods __str__() and __repr__() that are defined in the Python data model. The __str__() and __repr__() methods can be helpful in debugging Python code by Python special methods begin and end with a double underscore and are informally known as dunder methods. Dunder methods are the underlying methods for Python’s built-in operators and functions. You should avoid calling dunder methods directly, and instead implement the dunder methods in your class and then use the built-in functions that call them, such as str() and repr(). __str__() and __repr__()? The __str__() method returns a human-readable, or informal, string representation of an object. This method is called by the built-in print(), str(), and format() functions. If you don’t define a __str__() method for a class, then the built-in object implementation calls the __repr__() method instead. The __repr__() method returns a more information-rich, or official, string representation of an object. This method is called by the built-in repr() function. If possible, the string returned should be a valid Python expression that can be used to recreate the object. In all cases, the string should be informative and unambiguous. In general, the __str__() string is intended for users and the __repr__() string is intended for developers. __str__() and __repr__() Examples Using a Built-In Class The examples in this section call the __str__() and __repr__() methods directly for dem...

Python string is a sequence of Unicode characters that is enclosed in quotation marks. In this article, we will discuss the in-built function i.e. the functions provided by Python to operate on strings. Note: Every string method does not change the original string instead returns a new string with the changed attributes. Case Changing of Strings The below functions are used to change the case of the strings. • lower(): Converts all uppercase characters in a string into lowercase • upper(): Converts all lowercase characters in a string into uppercase • title(): Convert string to title case • swapcase(): Swap the cases of all characters in a string • capitalize() : Convert the first character of a string to uppercase Example: Changing the case of Python Strings Output Converted String: GEEKS FOR GEEKS Converted String: geeks for geeks Converted String: Geeks For Geeks Converted String: GEEkS fOR GEeKs Original String geeKs For geEkS Time complexity: O(n) where n is the length of the string ‘text’ Auxiliary space: O(1) Table of Python String Methods Function Name Description Converts the first character of the string to a capital (uppercase) letter Implements caseless string matching Pad the string with the specified character. Returns the number of occurrences of a substring in the string. Encodes strings with the specified encoded scheme Returns “True” if a string ends with the given suffix Specifies the amount of space to be substituted with the “\t” symbol in the string R...