rpartition() : Break a string into three parts using search string from right side using the input search string in Python

The rpartition() function in Python splits a string into three parts based on the last occurrence of a specified separator. It is particularly useful for retrieving the last segment of a string after a known character.

Syntax

string.rpartition(separator)

- separator: The substring by which the string is split from the right. Three parts are here.

1. Left part of the matched string
2. The searched string
3. Right part of the matched string

If not found, `rpartition()` returns `('', '', original_string)`.

my_str='Welcome to Plus2net'
output=my_str.rpartition('to')
print(output)

Output is here

('Welcome ', 'to', ' Plus2net')

We can add one more line to display the last element

print(output[2])

Output

  plus2net

If matching string is not found then rpartition() returns the tuple with 3rd element as full string.

my_str='Welcome to Plus2net'
output=my_str.rpartition('ab')
print(output)

Output is here

('', '', 'Welcome to Plus2net')

If we use partition() in place or rpartition() the output is here ( the difference between rpartition() and partition() )

('Welcome to Plus2net', '', '')

Example 1: Basic Usage

text = "apple-orange-banana"
result = text.rpartition("-")
print(result)

Output:

('apple-orange', '-', 'banana')

Example 2: Separator Not Found

If the specified separator is absent, the entire string is returned as the third element.

text = "apple-orange-banana"
result = text.rpartition("/")
print(result)

Output:

('', '', 'apple-orange-banana')

Example 3: Extracting File Extension

Using rpartition() to separate the filename and extension.

filename = "document.pdf"
name, sep, extension = filename.rpartition(".")
print("Name:", name)
print("Extension:", extension)

Output:

Name: document
Extension: pdf

Applications of rpartition()

File Processing: Extract file extensions or last path segments.
String Parsing: Split strings by the last occurrence of a delimiter.
Data Cleaning: Retrieve trailing segments for analysis.

All String methods

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rpartition(): Splitting from Right

Syntax

Example 1: Basic Usage

Example 2: Separator Not Found

Example 3: Extracting File Extension

Applications of rpartition()

Subhendu Mohapatra