(New in 2.0) The UserString
module contains two classes,
UserString
and
MutableString
. The former is a wrapper for the
standard string type that can be subclassed, and the latter is a variation
that allows you to modify the string in place.
Note that MutableString
is not very efficient.
Most operations are implemented using slicing and string
concatenation. If performance is important, use lists of string
fragments or the array
module. Example 2-17 shows the UserString
module.
Example 2-17. Using the UserString Module
File: userstring-example-1.py import UserString class MyString(UserString.MutableString): def append(self, s): self.data = self.data + s def insert(self, index, s): self.data = self.data[index:] + s + self.data[index:] def remove(self, s): self.data = self.data.replace(s, "") file = open("samples/book.txt") text = file.read() file.close() book = MyString(text) for bird in ["gannet", "robin", "nuthatch"]: book.remove(bird) print book...
C: The one without the !
P: The one without the -!!! They've ALL got the !! It's a
Standard British Bird, the , it's in all the books!!!
...
18.218.212.102