webinar-python-exam-review-2023-01-20

# Exam Review 2024 Jan 20

# Do those LABS
# Ch 2-14... all Labs!
# Ch 21-32 just ADDITIONAL LABS, but important practice!
# 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!

# 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
# = # assigns
# == # asking a question? A condition
# +
# -
# *
# /
# % # 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
# -=
# ** # compare to pow(), math.pow()
# !=
# # keyword
# in # if x in myList
# not # if not x in myList
# and
# or # any one True means the combo is True...limit OR to 2-3 conditions

# Data Types/Classes
# int
# floats
# bool # True, False
# str # ""
# list # [ ]
# dict # {key: value}
# tuple # ( ) immutable, Python see a,b,c as (a,b,c) --> return x,y --> return (x,y)
# set # { } no duplicates, unordered --> no index, no slicing, no sort, no reverse
# range # range()... container of consecutive numbers --> range(start, stop, step)
# 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, etc
# LOOPS
# WHILE - - an IF that repeats
# FOR - looping over a container, or known number of times... hence range()
# # 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(5):
# for i in range(0, len(myList)): # myList[i]
# for i, item in enumerate(myList):

# FUNCTIONS
# defining/writing a function vs calling
# modular... a function has ONE job
# return statements
# parameters are special variables for holding stuff coming into the function
# parameters vs arguments
# pay attention to whether the function is asked to return or print()/output
#
# def someFunction(x, y):
#     return x // 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()
# len()
# min()
# max()
# sum()
# pow()
# abs()
# round() # cousins math.floor() and math.ceil()
# enumerate()
# int()
# float()
# list()
# range()
# str()
# dict()
# tuple()
# chr()
# ord()
# open()
# sorted() # different from list.sort()
# reversed() # different from list.reverse()
# type() # print(type(myVar).__name__)
# help()
# dir()
# help(str)
# print(dir(str))
# help(str.isspace)

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

# KNOW YOUR WHITESPACE
# " " # space from spacebar
# # a lot of Unicode spaces
# '\n' # new line return
# "\t" # tab
# "\r" # carriage return

# STRING METHODS
# myStr.format() # "Stuff I want to put together in this string like {:.2f}".format(myVar)
# 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), myStr.find(subStr) # return index where found
# myStr.count(subStr) # return number of occurrences
# case: myStr.lower(), myStr.upper(), myStr.capitalize(), myStr.title()
# is/Boolean: myStr.islower(), myStr.isspace(), myStr.isalpha(), myStr.isdigit(), myStr.isnumeric(), myStr.isalnum()
# 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)
# myList.remove(item) # pop() by index, remove() by value
# myList.clear()
# # other
# myList.sort()
# myList.reverse()
# myList.count(item)
# 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 --> similar to myDict.get()
# myDict[key] = value # assigns new value to key --> similar to myDict.update({k:v})
# DICT METHODS
# myDict.keys()
# myDict.values()
# if "this" in myDict: # membership check on a dict looks at keys
# if "that" in myDict.values():
# myDict.items() # for k, v in myDict.items()

# 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 sqrt # --> sqrt()
# from math import floor, ceil --> floor(), ceil()
# from math import * # floor(), sqrt()

# ALIAS IMPORT
# import math as m # --> m.floor(), m.factorial()

# FILES
# modes: r, w, a

# READ MODE
# with open("test.txt", "r") as f:
#     # f.read() # returns whole file as one big string
#     # f.readlines() # returns a list of strings, line by line
#     # f.write() # take one str arg and write into file (can't do here bc I'm in read mode)
#     contents = f.readlines()

# for line in contents:
#     line = line.strip()
#     print(line) # print(line, end="\n")
# print(contents)

# CSV Module
import csv # csv.reader()
with open("mock_data.csv", "r") as f1: # mockaroo.com
    contents = list(csv.reader(f1)) # csv.reader(f1, delimiter="\t") if a tsv
# print(contents[0:20])

# WRITE MODE
# let's write out a file with just rows where the last name started with H
# with open("output_data32.csv", 'w') as f2:
#     for row in contents:
#         # last name is position 2... row[2]
#         # lastName = row[2]
#         if row[2].startswith("H") or row[2].startswith("h"):
#         # if row[2].lower().startswith("h"):
#         # if row[2][0].lower() == "h":
#             f2.write(",".join(row) + "\n")

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

# ['Frodo\n', 'Sam\n', 'Merry'] # no final line return in this file tells me how to end my file's last line
with open("append_to_this.txt", "a") as f3:
    f3.write("\nPippin")