#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Felix Muzny
10/25/2022
DS 2000
Lecture 14 - dictionaries, part 1

Logistics:
    - Homework 6 is due Friday @ 9pm
        - Dictionaries are not required. We don't think that using
        them will make your lives easier.
    
    - NO Quiz this week
    
    - Friday lecture materials will be released for asynchronous viewing:
        - ____________
        
    - *IMPORTANT* On Friday, I will be holding office hours during 
    from 9:50 - 10:55am and 1:35 - 2:40pm in RI 236.
    
    No class or office hours during Section 4's regular meeting time.
    (I will be on a train.)
    
    
    - 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:
    
If I have the following code, what will the output be?
"""


        
"""
A. [0, 1, 2, 3, 4]
B. [[0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4]]
C. [[0, 1, 2], [0, 1, 2], [0, 1, 2], [0, 1, 2], [0, 1, 2]]
D. [0, 1, 2]
E. Error
"""

"""
Warm-up 2:
    
If I have the following code, what will it's effect be?
"""

file = open("assumethisfileexists.txt", "r")
for line in file:
    if line[0] != "%":
        print(line)
    else:
        line = file.readline()

file.close()

"""
A. This will print all lines in the file
B. This will print all lines in the file that don't start with %
C. This will print no lines in the file
D. This will do something else 
E. Error
"""



"""
Dictionaries
---
A dictionary is a *data structure*, similarly to lists.

A dictionary links a *key* to a *value*.

Examples:
    student emails -> graduation year
    words -> definitions
    words -> counts of how often they occur
    names -> ages
    
    
Keys: any immutable data type (ints, floats, strings, booleans)
    keys are *unique* (no key can occur more than once)
    
Values: any data type
    values are not unique

"""
# # Dictionary examples

# # Creating a dictionary
# # an empty dictionary
# print("dict examples")
# ages = {}

# # a dictionary w/ some starting values
# ages = {"Felix": 31, "Dylan": 33}
# print(ages)
# # number of key-value pairs
# print(len(ages)) 

# # adding a key/value pair to a dictionary
# ages["Donald Duck"] = 5
# print(ages)
# # number of key-value pairs
# print(len(ages))

# # updating a key/value pair in a dictionary
# ages["Felix"] = 32
# ages["Felix"] = ages["Felix"] + 1
# ages["Felix"] += 1
# print(ages)
# # number of key-value pairs
# print(len(ages))

# # what if I look up a key/value that doesn't exist?
# # KeyError
# # print(ages["Lizzo"])

# # test for a key in a dict
# if "Lizzo" in ages:
#     print(ages["Lizzo"])
# else:
#     print("oh no!")
# print()

# # iterating through all values in a dictionary
# for key in ages:
#     print(key) # key
#     print(ages[key]) # value it is linked to
# print()
    
# for key, value in ages.items():
#     # key = next key in the dict
#     # value = ages[key]
#     print(key) # key
#     print(value) # value it is linked to
# print()


"""
How is a list similar to a dictionary?
---
"""


"""
Writing a function
----

Write a function, count_words, that takes in a string text as input
and returns a dictionary of word counts.
"""

def count_words(text):
    """
    Count each word in a given string.

    Parameters
    ----------
    text : str
        words separated by whitespace.

    Returns
    -------
    dict of word counts.
    """
    print("to be implemented")
    
test1 = "This is a sentence."
test2 = "hat hat hat cat bat hat"


"""
Writing a larger program
---

Using the movie review data (blackadam.txt and tickettoparadise.txt), write
a larger program that will read in each review for the given movie, line-by-line
and does two things:
    1) Lets the user ask how many times a word exists in the reviews
    2) Reports the combined word counts for all reviews for that movie
    
https://www.rottentomatoes.com/m/black_adam
https://www.rottentomatoes.com/m/ticket_to_paradise_2022
"""

"""
Cool-down 1
---
Go pull up the HW 6 write-up. 
What cleaning must be done to the data that you are working with?
"""

"""
Next time (what to expect for the asynchronous installment)
    - combining dictionaries with lists
    - writing another, larger program!
"""