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These strings will be passed to several of the file-related functions introduced in this chapter.For example, the following example joins names from a list of filenames to the end of a folder’s name: ) folders.This configuration file may be edited with a text editor (e.g.Notepad), and should contain a single line with command line switches.Pass writes the string to the file and returns the number of characters written, including the newline. To add text to the existing contents of the file instead of replacing the string we just wrote, we open the file in append mode.
As of version 6.00, "fast printing" is available: just press Ctrl P on the keyboard and select a printer.
Once you are comfortable working with folders and relative paths, you’ll be able to specify the location of files to read and write.
The functions covered in the next few sections will apply to plaintext files. These can be opened with Windows’s Notepad or OS X’s Text Edit application.
Fortunately, many modules make working with binary files easier—you will explore one of them, the for short.
When a file is opened in read mode, Python lets you only read data from the file; you can’t write or modify it in any way.