Sometimes, we want to replace multiple substrings of a string in Python.

In this article, we’ll look at how to replace multiple substrings of a string in Python.

How to replace multiple substrings of a string in Python?

To replace multiple substrings of a string in Python, we can use the Python string’s `replace method.

For instance, we write:

def replace_all(text, dic):
    for i, j in dic.items():
        text = text.replace(i, j)
    return text

d = { "cat": "dog", "dog": "pig"}
my_sentence = "This is my cat and this is my dog."
new_sentence = replace_all(my_sentence, d)
print(new_sentence)    

to create the replace_all function.

We loop through the dic dictionary’s key-value pairs which are returned by dic.items.

Then we call text.replace with i and j, which is the original substring and the replacement substring respectively.

And we assign the new returned string to text.

Finally, we return text which has all the replacements done.

Next, we call replace_all with my_sentence and d.

And new_sentence is 'This is my pig and this is my pig.'.

Conclusion

To replace multiple substrings of a string in Python, we can use the Python string’s `replace method.