LPTHW CH1

Question 1

print

Answer 1

it prints out quoted strings in powershell.

Use “” or ‘’

Question 2

What does # do?

Answer 2

cancels the line of code for commenting

Question 3

What are the math symbols?

Answer 3

\+ add 
- subtract 
* mult
/ divide 
% percent

Question 4

What are the greater and less than symbols?

Answer 4

> greater than
= greater and equal
I’m sad that your greater and equal

They will give the result of true or false

Question 5

What do variables do?

Answer 5

It’s name for something. You can assign it a number, equation, or defined function

Question 6

%s, %d, %r

Which is best for debugging?

Answer 6

Formatters replace a variable or value in the printed strings. If you want multiple, you need to use ( )

Question 7

”””

Answer 7

allows you to print on unlimited lines of code

Question 8

\t

Answer 8

tabs the code in

Question 9

\

Answer 9

splits on a line; also put this in front of a quote to refrain from ending the print

Question 10

\

Answer 10

allows for a single slash in the string

Question 11

raw_input()

Answer 11

asks the user for an input

Question 12

int(raw_input())

Answer 12

Converts the input from the user to a number

Question 13

raw_input(“How old are you?”)

Answer 13

This prompts the user the question in the parentheses and asks for an answer

Question 14

from sys import argv

Answer 14

from the sys module (library of code) import (takes it out of the library) argv (argument fx)

Question 15

script, first, second, third = argv

Answer 15

there are three variables. You must pass three command line arguments

Question 16

What’s the difference between argv and raw_input?

Answer 16

arguments you pass to your python script on command line when you run it. It unpacks them on command line.
While the script is running, raw_input() prompts the user for an input

Question 17

open

Answer 17

opens a file on command line

Question 18

read

Answer 18

reads a file on command line

Question 19

txt.read ()

Answer 19

reads the text file

ex) print txt.read(filename)

Question 20

close

Answer 20

closes file on command line

Question 21

target.write()

Answer 21

Allows you to write in a text when prompted on command line script.

Question 22

target.close()

Answer 22

closes the file

Question 23

truncates()

Answer 23

truncates a file

Question 24

from os.path import exists

Answer 24

Your importing exists from os.path module

Question 25

exists

Answer 25

it checks to see if a file or directory exists

Question 26

echo

Answer 26

makes a file on command line

Question 27

cat

Answer 27

reads the text file

Question 28

What 3 things a function does?

Answer 28

1. Names pieces of code 2. They take argument variables 3. make "mini-scripts" or "tiny commands"