A text file is a sequence of characters stored on a permanent medium like a hard drive, flash memory, or CD-ROM. We saw how to open and read a file in Section 9.1.
To write a file, you have to open it with mode
'w' as a second parameter:
>>> fout = open('output.txt', 'w') >>> print fout <open file 'output.txt', mode 'w' at 0xb7eb2410>
If the file already exists, opening it in write mode clears out the old data and starts fresh, so be careful! If the file doesn’t exist, a new one is created.
write method puts data into the file.
>>> line1 = "This here's the wattle,\n" >>> fout.write(line1)
Again, the file object keeps track of where it is, so if you call
write again, it adds the new data to the end.
>>> line2 = "the emblem of our land.\n" >>> fout.write(line2)
When you are done writing, you have to close the file.