Python Jumpstart by Building 10 Apps Transcripts
Chapter: App 4: Journal app and file I/O
Lecture: Core concept: File I/O
0:00 So that brings us to our next core concept, file I/O.
0:03 And here you can see we have a list of three text items
0:06 and imagine we want to just write these to a file.
0:09 So, if we’re going to use that file stream, briefly
0:12 and then when we exit this little segment we are going to close it,
0:15 we'll use this context manager so we'll start out with,
0:18 create the item as variable name.
0:22 So, in this case with open and we pass file name and w for write text format,
0:27 and we want to say as fout,
0:30 for that's the variable I am calling it output file stream.
0:32 And then we just do whatever we want to do to write to the file,
0:35 so in this case we want to write these three items on three lines
0:38 and this text file so we just for-in loop over them
0:41 and we say fout.write the text and as you saw,
0:44 that does not put a new line on there as it should not,
0:47 so we have to add it with this \n.