A string is known as a sequence of characters, and string manipulation is something we programmers do all the time. In Python, Strings are arrays of bytes that represent Unicode characters.
Python does not contain any character variables compared to other programming languages. In Python, characters are instead strings of unit length.
String manipulation is the process of manipulating and analyzing strings. It involves modification and parsing of strings to use and change their data.
Python has several built-in functions in the standard library to help programmers manipulate strings in different ways. Let's learn more about these functions.
The replace() method is used to replace a part of the string with another string. As an example, let's replace 'ing' in Coding with 'ers,' making it Coders.
count() method is used to count a particular character in the string.
string = 'Coding Ninjas'
# count the character 'i'.
count1 = string.count('i')
print("Count of 'i': ", count1)
# Count spaces.
count2 = string.count(' ')
print("Number of spaces:", count2)
Output:
Split a String
It is a very common practice to split a string into smaller strings. In Python, we use the split() function to do this. It splits the string from the identified separator and returns all the pieces in a list.
Syntax:
string.split(separator, maxsplit)
separator: the string splits at this separator.
maxsplit (optional): tells how many splits to do.
For example,
string = 'Welcome to Coding Ninjas'
# Splitting across the whitespace.
myList = string.split(" ")
print(myList)
Output:
Note: The split() method, by default, takes any consecutive number of whitespaces as delimiters.
The find() function looks for the first occurrence of the provided value. If the value is not found in that string, it returns -1. The value can be any character or a substring.
string = 'Welcome to Coding Ninjas'
index = string.find('t')
print(index)
This method is used to join a sequence of strings with some operator. The join() operator will create a new string by joining every character of the sequence with a specified character, including whitespaces.
Note: The join() method only accepts strings. If any element in the iteration is of a different type, an error will be thrown.
Syntax:
"character".join(seq)
character: The character from which the strings will be joined.
seq: Sequence of the strings to be joined.
string = 'Welcome to Coding Ninjas'
# joining the above-given characters of the string with ‘,’.
string = ",".join(string)
print(string)
A string is a sequence of alphabets, words, or other characters. It is a simple data structure that serves as the foundation for data manipulation. Strings in Python are "immutable." They can't be modified once they're created.
What is string manipulation?
String manipulation is the process of manipulating and analyzing strings. It includes a variety of processes involving the modification and parsing of strings to use and change their data.
Why is string manipulation important?
Because most applications deal with text and interact with the user, string manipulation is important for new programmers to learn. A string is a variable that contains a string of one or more alphanumeric characters. A string can usually be manipulated to provide information or change its contents.
What are the two built-in string manipulation function in Python?
Two common built-in string manipulation functions in Python are:
str.upper(): Converts a string to uppercase.
str.lower(): Converts a string to lowercase. These functions are used for changing the case of characters within a string.
Conclusion
In conclusion, string manipulation in Python involves various operations to modify and process strings, including altering case, concatenating, slicing, searching, and formatting. These operations are essential for text processing, data manipulation, and generating dynamic content in Python programs.
So folks, now you are ready to play with the strings. Start today and use the above methods to master strings.
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