Python is a well-known object-oriented programming language. It can produce software, websites, games, and mobile applications. “Find all occurrences in string in Python” is a fairly common problem that any programmer will face. So, what are our solutions? Everything will be made clearly to you.

How to find all occurrences in string in Python

Method 1: Use The string.count()

In this tip, you can find all occurrences in string in Python by using string.count(). So, don’t waste time, let’s learn about this through the following example:

mystr = "I love dogs. dogs are loyal" 
substr = "dogs" 
count1 = mystr.count(substr) 
print(count1) 
count2 = mystr.count(substr,0,12) 
print(count2)

We can now reassure users that the problem is simple to resolve.

Method 2: Use startwith ()

Another way to find all occurrences in string in Python is to use startswith(). In Python, you can use startswith() to find a string that matches all instances. Let’s see how we can get this done quickly through the below instance:

mystr = "I love dogs. dogs are loyal" 
substr = "dogs" 
print("my string is : " + mystr) 
print("substring : " + substr)
res = [i for i in range(len(mystr)) if mystr.startswith(substr, i)] 
print("The start indices of the substrings are : " + str(res))

Output:

my string is : I love dogs. dogs are loyal
substring : dogs
The start indices of the substrings are : [7, 13]

Method 3: Use re.finditer()

A method that is as effective as the above methods is using re.finditer() find all occurrences in string in Python. The regex library that Python offers programmers for use in their scripts has a function called re.finditer(). Finding the presence of a specific pattern in a string is made easier with its aid. We must first import the regex library re in order to utilize this function.

The pattern and string parameters are used in the syntax of re.finditer(). The substring is referred to by the pattern in this instance.

import re

# defining string
str1 = "This dress looks good; you have good taste in clothes."

#defining substring
substr = "good"

print("The original string is: " + str1)

print("The substring to find: " + substr)

result = [_.start() for _ in re.finditer(substr, str1)]

print("The start indices of the substrings are : " + str(result))

Output:

The original string is: This dress looks good; you have good taste in clothes.
The substring to find: good
The start indices of the substrings are : [17, 34]

Conclusion

Python is well suited to high-level systems but performance would be marginally worse than in the native language. However, you quickly gain safety, range of motion, and maintenance. Individual solutions provided in these tools are several of the most basic for anyone encountering the question “How to find all occurrences in string in Python“. If you still need help or have basic Python and Anaconda questions, you have a growing community of people who are usually happy to help you. Furthermore, we anticipate a more creative day full of new ideas and code.

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