Replacing Python Strings
Often you'll have a string (str object), where you will want to modify the contents by replacing one piece of text with another. In Python, everything is an object - including strings. This includes the str object. Luckily, Python's string module comes with a replace() method. The replace() method is part of the string module, and can be called either from a str object or from the string module alone.
Python's string.replace() Prototype
The prototype of the string.replace() method is as follows:
string.replace(s, old, new[, maxreplace])
Function parameters
s: The string to search and replace from.- old
- new
- maxreplace
Examples
From the string Module Directly
s: The string to search and replace from.[python]
our_str = 'Hello World'
import string
new_str = string.replace(our_str, 'World', 'Jackson')
print(new_str)
new_str = string.replace(our_str, 'Hello', 'Hello,')
print(new_str)
our_str = 'Hello you, you and you!'
new_str = string.replace(our_str, 'you', 'me', 1)
print(new_str)
new_str = string.replace(our_str, 'you', 'me', 2)
print(new_str)
new_str = string.replace(our_str, 'you', 'me', 3)
print(new_str)
[/python]
This gives us the following output:
[shell]
Hello Jackson
Hello, World
Hello me, you and you!
Hello me, me and you!
Hello me, me and me!
[/shell]
And using the string.replace() method from the str object:
[python]
our_str = 'Hello World'
new_str = our_str.replace('World', 'Jackson')
print(new_str)
new_str = our_str.replace('Hello', 'Hello,')
print(new_str)
our_str = 'Hello you, you and you!'
new_str = our_str.replace('you', 'me', 1)
print(new_str)
new_str = our_str.replace('you', 'me', 2)
print(new_str)
new_str = our_str.replace('you', 'me', 3)
print(new_str)
[/python]
Which gives us:
[shell]
Hello Jackson
Hello, World
Hello me, you and you!
Hello me, me and you!
Hello me, me and me!
[/shell]
Shockingly, we get the same output.
And there you have it! Python's string.replace().