webinar-exam-review-2024-03-23

# Exam Review 2024 Mar 23

# Do those LABS
# Ch 2-14... all Labs!
# Ch 21-32 just ADDITIONAL LABS, but important practice!
# get to know the Prac Tests, Ch 33 and 34... more than the Pre

# Use Submit Mode and get them to 100%!!!
# PAY ATTENTION to the unit tests!
# ... then UNIT TEST more! Unit test, unit test, unit test!

# When you've gotten the Ch 33-34 Prac Tests to 100, go back and do each again.
# This time, try to think of 2-3 more unit tests that could be run on each question.

# Comp 1: Basic syntax and knowledge: operators, data types, etc
# Comp 2: Control Flow
# Comp 3: Modules and Files

# Comp 1: Basic syntax and knowledge: operators, data types, etc

# Operators
# = # assignment
# == # asking a question... result in Boolean value
# +
# -
# *
# /
# % # modulo... whole number remainder... "how many whole things didn't fit since the last even division?"
# // # floor division... the last even division
# <
# >
# <=
# >=
# += # x += 1 --> x = x + 1
# -=
# ** # similar to pow() and math.pow()
# !=
# # keywords
# in # membership check... if x in myList:
# not # if not x in myList:
# and
# or # any one True would cause the combo to be True... limit OR to 2-3 conditions

# Data Types/Classes
# int
# float
# bool
# str # ""
# list # [ ]
# dict # {key:value}
# tuple # ( ) immutable, Python sees a, b, c as (a,b,c) --> return x,y --> return (x,y)
# set # { } no duplicate values, no order --> no indices, can't slice it, can't sort it or reverse
# range # range()... container of consecutive numbers
# file # open()... f.read(), f.readlines(), f.write()

# Comp 2
# Control Flow! The how and when of our programs
# IF statements... if, if/else, if/elif, if/elif/else
# LOOPS
# WHILE - a general purpose loop, an IF that repeats
# FOR - repeating actions a known number of times --> once for everything in a container
# FOR in Python is explicitly for a container
# # Check out my For Loops webinar in The Gotchas
# for ___ in _someContainer_:
# for item in myList:
# for char in myStr:
# for key in myDict: # myDict[key]
# for n in range(0, 5): # [0, 1, 2, 3, 4]
# for i in range(len(myList)): # for i in range(0, len(myList), 2):
# for i, item in enumerate(myList):

# FUNCTIONS
# defining/writing a function vs calling
# modular... a function has ONE specific job
# print/output or return (or maybe something else)
# parameters are special variables for holding stuff coming into the function
# parameters vs arguments
#
# def someFunction(x, y):
#     return (x*y) - y
#
# if __name__ == "__main__": # is this script the one that's running now
#     # inside this block we're answering this specific question
#     input1 = int(input())
#     input2 = int(input())
#     myNum = someFunction(input1, input2)
#     print(myNum)
#

# See "tasks" in the last section of Ch 10, 11, 13, 14 for function writing practice
# CodingBat also has good function-based Python questions:
# https://codingbat.com/python

# Built-In Functions
# input()
# print()
# range()
# len()
# sum()
# min()
# max()
# int()
# float()
# list()
# type() # myVar = 3.14, print(type(myVar).__name__)
# enumerate()
# pow()
# abs() # cousin math.fabs()
# round() # cousins math.ceil(), math.floor()
# open()
# help() # help(str) # help(str.isspace)
# dir() # print(dir(list))

# STRINGS
# be able to refer to indices, and slice
# myStr = "abcdefg"
# # mySlice[start:stop:step]
# revStr = myStr[::-1]
# print(revStr)

# KNOW YOUR WHITESPACE
" " # space from the spacebar
# a lot of other spaces in Unicode
"\n" # new line return
"\r" # carriage return
"\t" # tab

# unless otherwise stated... printed output should end a new line return...
# 99% of the time it already does
# print("hey") --> print("hey", end="\n")
# we only need to change that when...
#1 ... this specific says to do something else
#2 ... you yourself overrode the end parameter of print() as the last thing you did...  just call print() again

# STRING METHODS
# myStr.format() # "Stuff I want put {:formattingInstructions} and {} together in one string".format(var1, var2)
# myStr.strip() # input().strip()
# myStr.split() # returns a list of smaller strings
# ",".join(listOfStrings)
# myStr.replace(subStr, newStr) # "remove" myStr = myStr.replace(subStr, "")
# myStr.index(subStr) # index int or raises an error if not there
# myStr.find(subStr) # index int or -1
# myStr.count(subStr) # return int number of times it's there
# case: .lower(), .upper(), .title(), .capitalize()
# is/Boolean: .islower(), .isupper(), .isspace(), .isalpha(), .isnumeric(), .isdigit(), .isalnum()
# print("ashes of mars".title()) # Ashes Of Mars
# myStr.startswith(subStr), myStr.endswith(substr)

# LISTS
# be able to refer by index and to slice
# LIST METHODS
# +
# myList.append(item)
# myList.insert(i, item)
# myList.extend(anotherList)
# # -
# myList.pop(i) # pop() by index
# myList.remove(item) # remove() by value
# myList.clear()
# # other
# myList.sort()
# myList.reverse()
# myList.count(item) # returns num occurrences
# myList.copy()
# myList.index(item)

# DICT
# use the key like an index []... then you don't really need DICT methods
# myDict[key] # get the value for that key... like myDict.get()
# myDict[key] = value # assigns new value to key, replaces myDict.update({key:value})

# DICT METHODS
# myDict.keys() # all dict keys in a set-like objects
# myDicts.values() # all dict values in a set-like object

# membership check
# if ___ in myDict: # looking at keys
# if ___ in myDict.values() # looking at values

# MODULES
# math and csv

# MATH MODULE
# import math # FULL IMPORT
# math.factorial(x)
# math.ceil(x)
# math.floor(x)
# math.sqrt(x)
# math.pow(x, y)
# math.fabs(x)
# math.pi
# math.e

# PARTIAL IMPORT
# from math import ceil # just ceil() not math.ceil()
# from math import ceil, floor # ceil(), floor()
# from math import * # floor(), sqrt()
#
# # ALIAS IMPORT
# import math as m # m.floor(), m.factorial()

# FILES
# modes: r, w, a

# READ MODE

# myInput = input() # filename from input
# with open(myInput, "r"):
# with open("test.txt", "r") as f:
#     # f.read() # return the whole file as one string
#     # f.readlines() # returns a list of strings, line by line
#     # f.write() # writes a single str arg to file

# with open("test.txt", "r") as f:
#     contents = f.readlines()
# # print(contents) # ['Hello.\n', 'This\n', 'is\n', 'just\n', 'a\n', 'string.\n', 'But...\n', 'with\n', 'many\n', 'line\n', 'breaks!']
# for line in contents:
#     line = line.strip()
#     print(line)

# import csv
# # csv.reader()
# with open("mock_data.csv", "r") as f1: # mockaroo.com
#     # contents = f.readlines()
#     contents = list(csv.reader(f1)) # csv.reader(f1, delimiter="\t") for tsv
# # print(contents)
# for row in contents[0:20]:
#     print(row)
# print(contents[3][2])

# WRITE MODE
# write out a new file where all the last names begin with "H"
# with open("output_data36.csv", "w") as f2:
#     for row in contents:
#         # ['1', 'Remington', 'Shilling', 'rshilling0@wsj.com', 'Male', '1.71.141.52']
#         # last name is row[2]
#         # if row[2][0] == "H":
#         # if row[2][0].lower() == "h":
#         if row[2].startswith("H") or row[2].startswith("h"):
#             f2.write(",".join(row) + "\n")

# APPEND MODE
# reading it to see...
# with open("append_to_this.txt", "r") as f3:
#     print(f3.readlines())

# write it...
with open("append_to_this.txt", "a") as f3:
    f3.write("\nPippin")

# read it back to check...
with open("append_to_this.txt", "r") as f3:
    print(f3.readlines())