1. LING 388: Computers and Language
Lecture 9

2. Administrivia Reminder: next week TA Patricia Lee will lead the class
Lecture 8 slides updated with examples from last class
Today topic: file handling

3. Python: Files
Like all other programming languages, uses a file handle, called file variable: open()
infile = open("file.txt","r") outfile = open("results.txt,"w")

4. Python: Files
writing-files

5. Sample text file Course webpage: falconheavylaunch.txt
environment
Course webpage: falconheavylaunch.txt

6. Class Exercise Download falconheavylaunch.txt to your computer.
Answer the following questions.
How many characters are there in the article?
How many lines of text are there in the article?
How many lines excluding blank lines?
How many words are there in the article?
How many characters per word?
What are the most common words?
Recall from lecture 7:
from collections import Counter
c = Counter()
c.most_common()

7. Answers to class exercise

8. Class Example: Questions 1 and 2

9. Class Example: Question 3

10. Class Example: Question 4

11. Class Example: Question 5
4.88 characters per word

12. Class Example: Question 6
Closed class items only in most common 10.
First open class items to appear are: rocket, Falcon, Jeavy, aircraft, Elon
Recall text summarizati on?

13. Python: Files
Writing (assuming you've opened a file for writing):

14. Python: json JSON = JavaScript Object Notation
Saving structured data with json
ml#module-json

15. Class Example: Python: json
Explanation: we loaded it back in as a dict.
most_common() is a method of Counter