Write a file to a directory in python

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Read the author's other free Python books:. Variables are a fine way to store data while your program is running, eirectory if you want your data to persist even after your program has finished, you need to english year 10 coursework it to a file.

In this chapter, you will learn how to use Python to create, read, and save files on the hard drive. A file has two key properties: a filename usually written as one word and a path.

write a file to a directory in python

The path specifies the location of a file on the computer. For example, there is a file on my Windows 7 laptop with the filename project.

Folders can contain files and other folders.

write a file to a directory in python

For example, project. Figure shows this folder organization. Also note that while folder names and filenames are not case sensitive on Windows and OS X, they are case sensitive on Linux.

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If you want your programs to work on all operating systems, you will have to write your Python scripts to xirectory both cases. Fortunately, this is simple to do with the os.

write a file to a directory in python

If you pass it the filr values of individual file and folder names in your path, os. Enter the following into the interactive shell:. Notice that the backslashes are doubled because each backslash needs to be escaped by another backslash character. The os. These strings will be passed to several of the file-related functions introduced in this chapter.

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Any filenames or paths that do not begin with the root folder are assumed to be under the current working directory. You can get the current working directory as a string value with the os.

Python will display an error if you try to change to a directory that does not exist. An absolute pathwhich always begins with the root folder.

write a file to a directory in python

There are also the dot. These are not real folders but special names that can be used in a path. Figure is an example of some folders and files. Figure For example. Your programs can create new folders directories with the os.]