Hi all,

Today we are moving one more step forward to master strings in Python. If you didn’t got chance to look at part 1 of mastering strings in Python have a look – https://knowledge-junction.in/2022/12/19/python-mastering-strings-part-1/

So let’s explore strings

In last article we discussed till string functions. So today we will start with “Find and replace functions”

Find and replace functions

# Here are some functions

# Program for functions related to find and replace functions
string1 = 'Education is not learning of many facts, but training of mind to think .'
print(string1)

# The len() function determines the length of a string
print('The length of a string is : ',len(string1))

# The 'in' returns true if the string contains the provided substring
print("Is 'Education' present in this string : ",'Education' in string1)

# The startswith() returns true if the string starts with provided string
print("Does the string starts with 'learning' : ",string1.startswith('learning'))

# The endwith() returns true if the string ends with provided strings
print("Does string ends with 'think. : '",string1.endswith('think.'))

# replace() replace all old substrings with new substrings
print("The new string is : ", string1.replace('.', '- ALBERT EINSTEIN'))

------------------------------------------------------------------
Output
Education is not learning of many facts, but training of mind to think .
The length of a string is :  72
Is 'Education' present in this string :  True
Does the string starts with 'learning' :  False
Does string ends with 'think. : ' False
The new string is :  Education is not learning of many facts, but training of mind to think - ALBERT EINSTEIN

---

Some more functions

# Program for functions related to find and replace functions
string2 = 'Education is not learning of many facts, but training of mind to think .'
print(string2)

# The count() counts the non - overlapping occurence of substring in a string
print("The number of times 'i' occurred in string : ", string2.count("i"))

# The find () returns the index of first occurrence of suplied substring in a string
print("The first occrence of 'to' in the string at index : ", string2.find("to"))
--------------------------------------------------------------------
Output
Education is not learning of many facts, but training of mind to think .
The number of times 'i' occurred in string :  7
The first occrence of 'to' in the string at index :  62

---

f strings

We have a separate article for f strings where you can understand the topic of f strings so have a look – https://knowledge-junction.in/2022/04/13/python-f-strings/

String Membership Test

'a' in 'program'
------------------

Output
True

'a' not in 'battle'
------------------
Output
False

---

Iterating through a string

We can iterate through a string using a for loop.

# Iterating through a string
count = 0
for letter in 'Hello World':
    if(letter == 'l'):
        count += 1
print(count,'letters found')
-----------------------------------
Output
3 letters found

---

We have very good series of Python articles, please have a look – https://knowledge-junction.in/category/python/

To make cool games in Python with pygame we also have a series, please have a look – https://knowledge-junction.in/dashboard/python-pygame-series/

To make awesome GUI in Python with tkinter – https://knowledge-junction.in/dashboard/python-gui-programming-with-tkinter-complete-tutorials/

Thank you for reading this article 🙂 and stay tuned for the next articles on strings

Have a nice day!!