#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""
Felix Muzny
DS 2001 - CS
October 20th/21st, 2021 
Practicum 7 - "Slides"!
"""

# Due dates this week:
# Friday @ 12pm (noon) — P7
#
# Friday @ 9pm (at night) - Final Group projects + topics
# you should be able to finish this in class today
# (in general, your final project deadlines will be at 9pm)

"""
Final Project:

0) Questions?
    
    
1) If you are looking for a group/teammate and don't have one yet:
    a) Look on the Canvas discussion for teammates, see if 
    one of the projects matches your interests/work schedule well!
"""
# top of the file
# Felix Muzny
# DS 2001 - SEction 14
# notes abotu files and functions and csvs

# any imports here
import p7_utils
import matplotlib.pyplot as plt

# define any constants here
FAVORITE_COLOR = "purple"
FILENAME = "boston-incident-reports-march2020-tiny.csv"

# no other variables should "live"
# outside of functions or "if __name__ == "__main__":"!

# When we structure our programs, we have the functions that 
# we've defined at the top, and *one* "if __name__ == "__main__":"
# at the bottom

# functions that we wrote for practicum last time!
# (if you didn't finish these, feel free to download
# the solutions from canvas)

def same_length(lst1, lst2):
    """
    name: same_length
    This function takes two lists and verifies that they have 
    the same number of elements.
    parameters:
    lst1 - first list
    lst2 - second list
    return:
    True if both lists have the same length, False otherwise
    """
    return len(lst1) == len(lst2)

def pretty_print(lst1, lst2):
    """
    name: pretty_print
    This function takes two lists and prints out the 
    elements in the following format:
    lst1_value1: lst2_value1
    lst1_value2: lst2_value2
    lst1_value3: lst2_value3
    ...
    For all items in the list
    parameters:
    lst1 - first list
    lst2 - second list
    return:
    none
    """
    for i in range(len(lst1)):
        print(lst1[i] + ": " + lst2[i])

"""
Group questions from last time that we're going to discuss now:
1) What _types_ can we pass as parameters to 
    the same_length function?
    - anything we can take len() of - strings, lists of anything

2) What does a function return when it has no
    return statement (like in pretty_print)?
    - the extra special value "None", which has the type NoneType
    - this value represents having nothing
    - be aware that accidentally saving the return value of a function that doesn't
    return is a common source of errors!
    
"""
def my_sum(ls):
    total = 0
    for num in ls:
        total += num
        # if you put your return total
        # here, then only the first value would be returned
        #return total
    return total

if __name__ == "__main__":
    print("p7 slides!")
    print()
    nums = ["1", "2", "3"]
    lets = ["a", "b", "c"]
    ans = same_length(nums, lets)
    print(ans)
    print(same_length("cat", "bones"))
    mystery_return = pretty_print(nums, lets)
    print(type(mystery_return))
    print(mystery_return)
    
    # What happens if a function has multiple
    # return statements? What if a return statement
    # is inside of a loop?
    big_nums = [1000, 238, 2000, 70000]
    answer = my_sum(big_nums)
    print(answer)
    print()
    
    # Two dimensional lists as tables of data!
    # [["row 1", "row 1 col 2"],
    #  ["row 2", "row 2 col 2"],
    #  ["row 3", "row 3 col 2"]]
    
    # read in the tiny data using the p7_utils module
    data = p7_utils.read_csv(FILENAME)
    print(type(data))
    print(data[0])
    print(len(data))
    
    # indexing into two dimensional lists
    first_row = data[0]
    print(first_row)
    hundredth_row = data[99]
    print(hundredth_row[1])
    print(data[0][1])
    
    
    # For p7, you're aiming to finish task 2
    # Task 2
    # hint: you only need one loop