Computer Science

# Lab 11 - File Read

## Activities

### num_lines.py

Write a function num_lines(filename) that returns the number of lines in a file.

twinkle_twinkle.txt

Twinkle, twinkle, little star
How I wonder what you are
Up above the world so high
Like a diamond in the sky
Twinkle, twinkle, little star
How I wonder what you are

For example:

num_lines("twinkle_twinkle.txt")

Would return:

6

### num_words_line.py

Write a function num_words_line(line) that returns the number of words in a line.

For example:

num_words_line("Baa Baa Black Sheep have you any wool?")

Would return:

8

### num_words_file.py

Write a function num_words_file(filename) that returns the number of words in a file.

humpty.txt

Humpty Dumpty sat on the wall
Humpty Dumpty had a great fall
All the king's horses and all the king's men
Couldn't put Humpty together again

For example:

num_words_file("humpty.txt")

Would return:

26

### sum_line.py

Write a function sum_line(line) that returns the sum of all the numbers in a line.

Uses .split() to get a list of words (in our case, numbers).

For example:

sum_line("1 314 42 3")

Would return:

360

### sum_file.py

Write a function sum_file(filename) that returns the sum of all the numbers in a file.

numbers.txt

1 2 3 4
5 6 7 8
9 10 11 12

For example:

sum_file("numbers.txt")

Would return;

78

### most_words.py

Write a function most_words(filename) that opens a file and returns the line in the file with the largest word count. If there is a tie, return whichever line comes first.

london_bridge.txt

London Bridge is falling down
Falling down
Falling down
London Bridge is falling down
My Fair Lady.

For example:

most_words("london_bridge.txt")

Would return:

"London Bridge is falling down"

num_lines.py5 points
num_words_line.py5 points
num_words_file.py5 points
sum_file.py5 points
sum_line.py5 points
most_words.py5 points