#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Felix Muzny
10/11/2022
DS 2000
Lecture 10 - lists of lists

Logistics:
    - HW 4 is due on *tonight* at 9pm
    -> no late submissions will be accepted
   
    - Quiz 5 is available on Gradescope (due Friday @ 9:50am)
    
    - Homework 5 is available on the course website (due *next* Friday
                                                     10/21 @ 9pm)
    
  
    - remote attendance (https://bit.ly/remote-ds2000-muzny)
    
 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 1 - functions 1
---

What is the value of x at the marked point in the following code?

"""

"""






Warm-up 2 - functions 2
---
What is the value of x at the marked point in the following code?

"""

"""

"""


"""
functions: syntax reminders
---
(Deitel & Deitel 4.2)

def function_name(parameters, separated, by, commas):
    # code
    return value
    
# to call the function
answer = function_name(values, matching, in, number)

"""

"""
Slicing
---

"""


"""
Lists of lists
---

A list of lists is a "table" of data:
    
    
neighborhood,latitude,longitude
Charlestown,42.3787,-71.0593
Allston / Brighton,42.3596,-71.1466
Back Bay,42.3594,-71.0587
South Boston,42.3337,-71.0466
Dorchester,42.3594,-71.0587
South Boston,42.3332,-71.0481
Dorchester,42.3149,-71.093
South End,42.3428,-71.0783
Allston / Brighton,42.3583,-71.1275

"""
# syntax examples



"""
Verify all rows same length
---

Write a function, verify_tabular, that returns
True if all rows in a list of lists have the same
length and False otherwise.

"""



"""
Lists of lists and nested loops (example 1)
---
Write a function, sum_2d_list that sums all numbers 
in a 2-dimensional list of lists of numbers.

Do this without using the python sum() function.
"""


"""
Lists of lists and nested loops (example 2)
---
Write a function, sum_2d_list that capitalizes all words 
in a 2-dimensional list of lists of strings.
"""



"""
Example program - updating earnings.py
---

Update earnings.py so that we only read the data in once, into a
list of lists, then extract the target column from the 
list of lists rather than re-opening the underlying file each time.


Add a search functionality to search for titles that contain
some substring.



(The data comes from here, originally:
 https://data.boston.gov/dataset/employee-earnings-report)
"""


"""
Next time:
    - data: where does it come from?
    - more on scope
    - lists + mutation

"""