ERUDITION

In Python, strings are like text containers that come with their own set of useful tools. These tools, called string methods, allow you to modify and work with strings in different ways. Here are some commonly used string methods and what they do: 1. ` capitalize() `: Makes the first letter of a string uppercase and the rest lowercase. 2. ` casefold() `: Converts the entire string to lowercase, even handling special cases. 3. ` center(width[, fillchar]) `: Puts a string in the middle of a line of a specific width, optionally filling the extra space with a chosen character. 4. ` count(sub[, start[, end]]) `: Counts how many times a specific part of a string appears within it. 5. ` endswith(suffix[, start[, end]]) `: Checks if a string ends with a particular set of characters and returns True or False. 6. ` find(sub[, start[, end]]) `: Searches for a specific part of a string and tells you where it starts. If not found, it returns -1. 7. ` index(sub[, start[, end]]) `: Similar to `find()...

String Format In the chapter on Python Variables, we discovered that it is not possible to mix strings and numbers together, as shown in the following example: Example weight = 60 line =  "I'm Abc, my weight is "  + weight print (line) However, there is a clever way to combine strings and numbers in Python by utilizing the format() method! You can use the format() method to insert values into a string by placing them inside curly braces {} : Example To insert numbers into strings, you can utilize the format() method : weight =  60 line =  "I'm Abc, my weight is {}" print (line. format (age)) Note:   The format() method allows you to include an unlimited number of arguments, which will be placed in the corresponding placeholders within the string: Example quantity = 4 item_no =  150 price =  65.67 my_order =  "He desires to acquire {} item {} for the price of {} dollars" print ( my_order . format (quantity,  item_no , price)) To ensur...

In Python, you can put two or more strings together to create a new string. This process is called string concatenation, and it's done using the "+" symbol. It lets you combine separate strings into a single one. For example, suppose we have two strings, "Hello" and "World".  We can use the "+" sign to join them together : ``` greeting = "Hello" name = "World" message = greeting + " " + name print(message) ``` This will output the string "Hello World". Note that we have added a space between the two strings using a string literal " ". We can also concatenate strings using the "join" method. This method takes an iterable of strings and concatenates them with a specified separator. ``` fruits = ["apple", "banana", "orange"] separator = ", " fruit_string = separator.join(fruits) print(fruit_string) ``` This will output the string "apple, bana...

Python -  Modify Strings Python comes with some ready-to-use tools that make working with text easier. Upper Case Example If you apply the upper() method to a string in Python, it will convert all the letters in the string to uppercase and return the modified string: x =   "Hello, World!" print (x. upper() ) Lower Case Example If you apply the  lower()  method to a string in Python, it will convert all the letters in the string to uppercase and return the modified string: x =  "Hello, World!" print (x.lower()) Remove Whitespace The term "whitespace" refers to the space that appears before and/or after the text itself, and it is often desirable to eliminate this space. Example Using the ` strip()` method, you can eliminate any whitespace located at the start or end of a string : x =  " Hello, World! " print (x.strip())  # returns "Hello, World!" Replace String Example With the ` replace() ` method, you can substitute one string with an...

Slicing The slice syntax can be utilized to obtain a selection of characters within a range. To obtain a specific portion of a string, indicate the beginning index and the ending index separated by a colon using the slice notation. Example Retrieve the characters starting from index 3 up to but not including index 7: x =   "Python slicing" print (x[ 3 : 7 ]) Note:  The first character has index 0. Slice From the Start If you don't specify the starting index, the range will start from the first character: Example Retrieve the first 5 characters of the string, excluding the character at the 6th position: x =   "Python slicing" print (x[: 6 ]) Slice To the End If you exclude the end index when defining a range, it will automatically include all the elements until the end : Example Retrieve all the characters from the 3rd position to the end of the string: x =   "Python slicing" print (x[ 3 :]) Negative Indexing To begin the slice from the end of the strin...