Python partition

The Python partition is one of the Python String Method, which is useful to split the given string using the specified separator and return a tuple with three arguments. This Python partition function starts looking for the separator from the Left-Hand side. Once it finds the separator, partition function returns the string before the Separator as Tuple Item 1, Separator itself as Tuple Item 2, and remaining string (or string after the Separator) as Tuple Item 3.

Syntax of a partition Function in Python

The syntax of the partition method in Python Programming Language is

String_Value.partition(Separator)
  • String_Value: Please select the valid String variable, or you can use the String directly.
  • Separator: This argument is required, and if you forget this argument, python throw TypeError.

NOTE: If you pass the non-existing item as a separator, the Python partition function return the whole string as Python Tuple Item 1 followed by two empty tuple items.

Return Value: Python partition function returns Tuple with three arguments. For example, If we have A*B*C and If we use * as a separator. The Python partition function search for * from left to right. Once partition function finds * it returns the string before the * symbol as Tuple Item 1 (A), * as Tuple Item 2 and remaining string as Tuple Item 3 (B*C).

Even though there are multiple occurrences of the separator, the partition function looks for the first occurrence

Python partition method Example

The following set of examples help to understand the partition Function in Python Programming Language.

# Python Partition Method Example
 
Str1 = 'Tutorial Gateway'
Str2 = 'Learn-Python-Programming'
Str3 = '[email protected]'
 
Str4 = Str1.partition(' ')
print("After Partitioning String 1 = ", Str4)

Str5 = Str2.partition('-')
print("After Partitioning String 2 = ", Str5)

Str6 = Str3.partition('@')
print("After Partitioning String 3 = ", Str6)

#Performing Python Partition function directly
Str7 = 'First_Image.png'.partition('.')
print("After Partitioning String 7 = ", Str7)
Python Partition Method

TIP: Please refer to Python rpartition article in Python String Method to understand the rpartition method, which performs the same operation but from right to left.

In this partition function example, first, we declared three String variable Str1, Str2, Str3. Next, we assigned corresponding value using the following statement

Str1 = 'Tutorial Gateway'
Str2 = 'Learn-Python-Programming'
Str3 = '[email protected]'

The following statement partition the Str1 string into multiple parts based on the separator we specified (i.e., Empty Space) and prints the output.

Str4 = Str1.partition(' ')
print("After Partitioning String 1 = ", Str4)

It partitions the Str2 string into multiple parts based on the ‘_’ symbol and prints the output.

Str5 = Str2.partition('-')
print("After Partitioning String 2 = ", Str5)

The following Python partition statement partition the Str3 string into multiple parts based on the ‘@’ symbol and prints the output.

Str6 = Str3.partition('@')
print("After Partitioning String 3 = ", Str6)

The below code uses the partition function directly on String

Str7 = 'First_Image.png'.partition('.')
print("After Partitioning String 7 = ", Str7)

The below Python code looks for *, which doesn’t exist. So it returns the Tuple as (‘Tutorial Gateway’, ”, ”).

Str8 = Str1.partition('*')