#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Felix Muzny
9/27/2022
DS 2000
Lecture 6 - while loops (finish), intro to for loops, looping through files

Logistics:
    - Quiz 3 is *already out*
        - due on Friday at 9:50am
    
    - Homework 3 is already available
        - again, you already have all the tools that you need for this
        homework — we do not expect you to use any of the material from
        this week on HW 3
  
    - no need to fill out a remote attendance form. :)
    
 Three ways to participate (please do one of these!)
 1) via the PollEverywhere website: https://pollev.com/muzny
 2) via text: text "muzny" to the number 22333 to join the session
 3) via Poll Everywhere app (available for iOS or Android)
    
Warm-up 0 - how are you doing?
---
A. great!
B. tired!
C. overwhelmed!
D. curious!
E. something else!


Warm-up 1 - while loops 1
---
What will happen with the following while loop?

count = 10
while count < 10:
    print(count)
    count = count + 1

A. prints 1 - 10
B. prints 10
C. prints 10 forever
D. Nothing
E. Error

Warm-up 2 - while loops 2
---
Fill in the following code so that the while loop prompts
the user for an answer until they type "end"




"""




"""
Fun tid-bits
---

In python, we have a shorthand for writing down:

    x = x + 1
    
Instead, we write:
    
    x += 1
    
Similarly, x = x + 5 becomes x += 5.

We can also do this with the - operator:
    x = x - 1
    
Becomes: 
    x -= 1
"""


"""
While loops: what we rememember
---



"""

"""
While loops + plotting
----
We can *absolutely* combine plotting with while loops.
For instance, let's plot the guesses that the user was making in our
hotcold.py program.

We'll  save this program as hotcold_plots.py
"""


"""
While loops: common patterns
---
(https://muzny.github.io/csci1200-notes/06/2/common_while_uses.html)
(https://muzny.github.io/csci1200-notes/06/3/while_accumulator.html)

"until X"

"up to a number/repeat X times"

"accumulator"
"""

# ask the user if they like cats until they say yes

# print out a random number from 1 to 3 five times

# count the number of 1s in five random  numbers from 1 to 3


"""
Nested loops: what's the story
---
Typically used when you have a task that needs repeating and the
*task itself* involves repetitions.

For example, suppose that I want to count from 1 - 3 ten times.

inner loop: 
    
outer loop:

"""

# example, note that both loops have all of the three 
# required parts of a while loop.



"""
Reading files with while loops 1
---
While loops let us repeat an action as many times as we'd like to.
    
Take a look at our first data file for today:
    - distances.txt
    
It's not immediately obvious what we would want the condition on
our while loop to be if we used a loop to go through this file...

"""

# file = open("distances.txt", "r")
# while _____:
#     line = file.readline()


# file.close()


"""
Data structures: lists
-----

"""

"""
Getting a list from a string: str.split()
-----


"""

"""
Reading files with while loops 2
---
Getting a list of strings out of the file:

"""



"""
Example problem:
---

Write a program, distance.py, that reads the data from the file distances.txt and 
graphs it accordingly on a scatter plot.
"""

"""
for loops 1: syntax
---


"""

"""
General for loops syntax 1
---

"""





"""
Example problem, updated:
---

Write a program, distance.py, that reads the data from the file 
distances_complex.txt and graphs it accordingly on a scatter plot.
Color days that were a run with one color and days that were a bike ride 
a different color.
"""


"""
Next time:
    - more for loops!
    - for loops with indexes
    - all the ways to iterate over a list
    
"""