Python String Compare

Top 3 Most Prominent Ways for Python String Compare

Python string compare is one of the crucial jobs for Python programmers in almost every programming language. Most of the time comparison of string is done to find out duplicates within the database software. String has its own importance in the world of programming.

In this blog, we are going to have a look at Python string compare. It will help you to figure out the best and most straightforward approach to compare strings with python.

But before we dig deep into the blog of string cmp in python, we need to know what is string in Python programming and how it works. Once we clear the basic of strings then we will move to the next step that  is to figure out how to compare sting in Python using various operators.

Don’t worry we will provide you the most suitable example along with the outputs to clear all your doubts once. Let’s get started to explore python string compare:-

How do you compare two strings equal in Python?

It is quite easy to compare two strings equal in Python using the (==) operator that is equal or not. Apart from that  if you want to check the inequality of two string then you can use (!=) operator. 

How do I check if a string is equal in Python?

The best way to check if a string is equal in Python or not is to use the (==) operator. Apart from that you can also use the __eq__() function. Python is a case sensitive language therefore when you check the string is equal then you need to make sure their case is also similar to each other. 

Does == work for strings Python?

Yes == works for strings Python. It works for almost all built-in Python objects such as strings, lists, dicts, functions and so on. Let’s have an example: suppose a is b then a==b is true but not always. 

See also  Python vs Matlab: Which One Is the Best Language

How do you check if a string is equal to another string in Python?

The most straightforward way to check it is the “==” operator. It is quite easy to compare strings in a character-by-character manner with the help of this operator. Its mechanism is quite simple, it returns true if the two strings are equal or equivalent to each other otherwise it returns false. 

What are Strings?

String is a sequence of characters. Characters can be an alphabet, symbol or number. And all these characters are represented in the computer with the help of binary code. The binary code is different for each character, number and symbol. All of these are ecode in the binary code and then decoded in their actual form as the final output to the users.

Apart from that we can also say that every character seen by the users on their display is string. Keep in mind that there are two types of encoding techniques i.e. ASCII and Unicode. Nowadays most of the programming languages support Unicode and Python is one of them. Let’s move on the our core topic i.e. Python string comparison.

How to Compare String in Python

Python String Compare by Relational Operators

Python offers us plenty of operators that can help us to compare strings to know if they are equivalent to each other or not. It can also help us compare the smaller sting to the greater one. These operators always return boolean values i.e. true or false and compare them using their Unicode values. Let’s have a quick overview of these operators. 

“==” operator is used to check whether two strings are equal to each other. It is one of the most common operators for comparing strings python.  Let’s have a look at the example to see python string compare:-

s1 = ‘Python’
s2 = ‘Python’
if s1 == s2:    
print(‘s1 and s2 are equal’)
else:    
print(‘s1 and s2 are not equal’)

Output

s1 and s2 are equal

“!=” operation is used to check that both strings are not equal to each other. It perform the opposite of “==” operator. Let’s have a look at the example to see python string compare:-  

s1 = ‘Python’
s2 = ‘Programming’
if s1 != s2:    
print(‘s1 and s2 are not equal’)
else:    
print(‘s1 and s2 are equal’)

Output

s1 and s2 are not equal

“<” operator is used to check that the string on the left side is smaller than the string on the right side. Let’s have a look at the example to see python string compare:-

s1 = ‘5886’
s2 = ‘6214’
if s1 < s2:    
print(‘s1 is less than s2’)
else:    
print(‘s2 is less than s1’)

Output

See also  Python VS Scala| Which is Best To Learn In 2021

s1 is less than s2

“<=” operator is used to check that the spring on the left side is smaller or equal to the string on the right side. With this operator any of these two conditions should be met.  Let’s have a look at the example to see python string compare:-

s1 = ‘5886’
s2 = ‘6214’
if s1 <= s2:    
print(‘s1 is less than equal to s2’)
else:    
print(‘s1 is not less than s2’)

Output

s1 is less than equal to s2

“>” operator is used to check that the string on the left side is greater than the string on the right side. Let’s have a look at the example to see python string compare:-

s1 = ‘5886’
s2 = ‘6214’
if s1 > s2:    
print(‘s1 is greater than s2’)
else:    
print(‘s2 is greater than s1’)

Output

s1 is greater than s2

“>=” operator is used to check if the string on the left side is greater than or equal to the string on the right side. With this operator any of the conditions should be met.

s1 = ‘5886’
s2 = ‘6214’
if s1 >= s2:    
print(‘s1 is greater than equal to s2’)
else:    
print(‘s2 is greater than s1’)

Output

s1 is greater than equal to s2

Keep in mind that most of the time we use the “==” operator to compare whether two strings are equal or not.

Python Compare String Using “is” Operator

Have a look at the example of how to compare strings using the “is” operator. As the name suggests, the “is” operator is used to check the equality of the two strings.

Like any other comparison operator, it also returns True or false as per the results of the comparison. Likewise if the string is similar to each other then it will return True otherwise False. It syntax is quite simple 

String1 is String2

Let’s have a look at the example to see python string compare:-

For Example 

string1=”Python”
string2=”Python”
if(string1 is string2): 
print(“string1 is equal to string2”)
else: 
print(“string1 is not equal to string2”)

Output

string1 is equal to string2

String Compare Python using “not is” operator

The is not operator is quite similar to != operator. If the strings are the same then it returns True otherwise it returns False. Let’s have a look at it syntax:-

String1 is not String2

Let’s have a look at the example to see python string compare:-

Example

string1= “Python”
string2=”Python”
print(string1 is not string2)
else:
print(string1 is equal to string 2)

Output

False

String Compare Python using  __eq__() function 

Python is a versatile programming language. It has plenty of functions that can help you in various tasks. It is quite easy comparing strings in python using __eq__(). Likewise any other comparison operators and functions.

See also  Python Vs SQL: Points You Need to Know About Python and SQL

It also compares the string and returns True if the strings are the same, otherwise return False. Let’s have a look at the example to see python string compare:-

Syntax

str1.__eq__(str2)

Example

string1=”Python”
string2=”Python”
if(string1.__eq__(string2)): 
print(“string1 is equal to string2”)
else: 
print(“string1 is not equal to string2”)

Output

String1 is equal to String 2

Point to be noted here is that __eq__() function is case sensitive. It means that if you compare Python with Python using this function then it will return False.

Python string comparison using sorted() method

Also Read

3. Comparing two strings using the sorted() function

Python is full of different functions to python compare strings. It compares the string for equality even if the character/words of the string is different then we need to use the sorted() function to compare two strings. Let’s have a look at the example to see python string compare:-

string1 = input(“Enter the first word: “)  
string2 = input(“Enter the second word: “)  
if sorted(string1) == sorted(string2):      
print (“First and second word are equal.”)  
else:      
print (“First and second word are not the same.”)

Output

Enter the first String: Python Programming

Enter the second String: Programming Python

First and second strings are equal.

Comparing strings in Python using Case-Insensitive function

Now we are python comparing string using the casefold() function. It helps us to compare the string even if their cases are different but with the same character set. The reason being that it automatically converts the string into lowercase and then compares the string. Let’s have a look at the example to see python string compare:-

s1 = ‘Python’
s2 = ‘python’
if s1.casefold() == s2.casefold():    
print(s1.casefold())    
print(s2.casefold())    
print(‘s1 and s2 are equal’)

Output

python

python

s1 and s2 are equal

Lower()

Lower() function converts the string into lowercase. Then we can compare the string as lowercase. Let’s have a look at the example to see python string compare:-

s1 = ‘Python’
s2 = ‘python’
if s1.lower() == s2.lower():    
print(s1.lower())    
print(s2.lower())    
print(‘s1 and s2 are equal’)

Output

python

python

s1 and s2 are equal

Upper()

Upper() function converts the string into uppercase. Then we can compare the string as uppercase. Let’s have a look at the example to see python string compare:-

s1 = ‘Python’s2 = ‘python’
if s1.upper() == s2.upper():    
print(s1.upper())    
print(s3.upper())    
print(‘s1 and s2 are equal’)

Output

PYTHON

PYTHON

s1 and s2 are equal

Python String Compare by User Defined Function

Apart from the inbuilt functions, we are also comparing string Python using user defined functions. With the help of these user defined functions we can compare the string on some parameters. Let’s have an example Python string comparison using a user defined function. 

def comp_str(string1, string2):    
c1 = 0    
c2 = 0          
for i in range(len(string1)):        
if string1[i] >= “0” and string1[i] <= “6”:            
c2 += 1          
for i in range(len(string2)):        
if string2[i] >= “0” and string2[i] <= “6”:            
c2 += 1          
return c1 == c2  
(comp_str(“12345”, “Python”))
print(‘False’)
(comp_str(“Python”, “Python”))
print(‘True’)

Output

False

True

Conclusion

We have seen the top 3 best and most prominent ways to Python string compare. If you were struggling with how to compare strings in Python then this blog may clear all your doubts and may help you to learn the best way to achieve your goal of python string comparison.

It is not rocket science to compare strings, but we should know the best ways to do so. If you still have some doubts in your mind then you can reach out to python programming experts who can solve all your doubts.

Frequently Asked Questions

Does == work for strings Python?

Yes == works for strings Python. It works for all built-in Python objects such as strings, lists, dictionaries, functions, etc. Let’s have an example: suppose a is b, then a==b is true but not always

How do you check if a string is equal to another string in Python?

The most straightforward way to check it is the “==” operator. It is pretty easy to compare strings in a character-by-character manner with the help of this operator. Its mechanism is quite simple, and it returns true if the two strings are equal or equivalent to each other otherwise, it returns false. 

Leave a Comment

Your email address will not be published. Required fields are marked *