Python 3 reference · String Methods

Python String partition() Method

Split the string at the first occurrence of a separator into a 3-tuple: the part before, the separator, and the part after.

Syntax

str.partition(sep)

Parameter	Description
`sep`	The separator to look for.

A tuple (before, sep, after); if sep isn't found: (string, '', '').

Split onceTry it yourself

print("key=value=more".partition("="))
print("no separator".partition("="))

Output

('key', '=', 'value=more')
('no separator', '', '')

Parse a header lineTry it yourself

header = "Content-Type: text/html"
name, _, value = header.partition(": ")
print(name, "->", value)

Output

Content-Type -> text/html

partition() never raises and always returns three parts, which makes unpacking safe.

Version	Change
Python 3.0	Added

str.rpartition() · Split the string at the last occurrence of a separator into a 3-tuple: before, separator and after.
str.split() · Split the string into a list of substrings at a separator. With no separator it splits on any whitespace.
str.find() · Return the lowest index where a substring is found, or -1 if it isn't. Optional start and end limit the search.
Python Strings · tutorial