webinar-python-exam-review-2023-10-21

# Exam Review 2023 Oct 21

# Do those LABS
# Ch 2-14... all Labs!
# Ch 21-32 just ADDITIONAL LABS, but important practice!
# Prac Tests, Ch 33 and 34

# Use Submit Mode and get them to 100%!!! And PAY ATTENTION to the unit tests!


# 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 if the values are equal
# +
# -
# *
# /
# % # modulo... whole number remainder... how many whole things didn't fit since the last even division?
# // # floor division... that last even division
# <
# >
# <=
# >=
# += # x += 1 --> x = x + 1
# -=
# ** # raise to a power... pow() and math.pow()
# !=
# # keywords
# 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

# Common Data Types/Classes
# int
# float
# bool # True, False
# str # "" most important data type?
# list # []
# dict # {key: value}... myDict[key]
# set # { } no duplicates, unordered.... no index, no slicing, no sort
# tuple # ( ) immutable, Python see a,b,c as (a,b,c) -> return x, y --_ return (x,y)
# range() #... container of consecutive numbers range(0, 7, 1)... [0, 1, 2, 3, 4, 5, 6]
# file # open()... f.read(), f.readlines(), f.write()

# Comp 2
# Control Flow! The HOW stuff
# IF statements... if, if/else, if/elif, if/elif/else
# LOOPS
# WHILE - an IF that repeats
# FOR - looping over a container, or a 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 num in range(5):
# for i in range(len(myList)): # myList[i]
# for i, item in enumerate(myList):

# FUNCTIONS
# defining/writing vs calling
# modular... a function has ONE job
# parameters are special variables for data 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
#     myInput = int(input())
#     myOther = int(input())
#     myNum = someFunction(myInput, myOther)
#     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()
# sum()
# min()
# max()
# list()
# str()
# int()
# float()
# range()
# tuple()
# dict()
# type() # x = "3.14159", print(type(x).__name__)
# enumerate()
# open()
# round() # cousins math.ceil(), math.floor()
# pow()
# abs() # compare to math.fabs()
# help() # help(str), help(str.isspace)
# dir() # print(dir(str))

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

# KNOW YOUR WHITESPACE
" " # space from spacebar
# a lot of Unicode space
# \n # new line return # print() -> print(end="\n")
# \r # carriage return
# \t # tab

# STRING METHODS
# myStr.format() # "Stuff I want to put together {}".format(var)
# myStr.strip() # input().strip()
# myStr.split() # return a list of smaller strings
# " ".join(listOfStrings)
# myStr.replace(subStr, newStr) # "remove" myStr = myStr.replace(subStr, "")
# myStr.find(subStr) # returns index where found, or -1 if not there, compare to myStr.index()
# myStr.count(subStr) # returns int of how many times found
# case: myStr.lower(), myStr.upper(), myStr.title(), myStr.capitalize()
# is/Boolean: myStr.islower(), .isupper(), isspace(), isalpha(), .isnumeric(), .isdigit(), .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()
# # others
# myList.count(item)
# myList.sort()
# myList.reverse()
# myList.copy()
# myList.index(item)

# DICT
# use the key like an index []... then you don't need DICT methods
# myDict[key] # get the value for that key
# myDict[key] = value # assign a new value to key
#
# # DICT METHODS
# myDict.keys()
# myDict.values()
# myDict.items() # for k, v in myDict.items()

# if _key_ in myDict: # only looks at keys

# MODULES
# math and csv

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

# PARTIAL IMPORT
from math import floor # floor(x.yz)
from math import sqrt, ceil # sqrt(x), ceil(y)
from math import * # sqrt(y)

# ALIAS IMPORT
import math as m # m.floor(x.yz)

# FILES

# 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
    contents = f.readlines()
# print(contents)
# for line in contents:
#     line = line.strip()
#     print(line)

# CSV Module
# csv.reader()
import csv
with open("mock_data.csv", "r") as f1: # mockaroo.com
    contents = list(csv.reader(f1)) # csv.reader(f1, delimiter="\t")
# print(contents) # [['id', 'first_name', 'last_name', 'email', 'gender', 'ip_address'], ['1', 'Remington', 'Shilling', 'rshilling0@wsj.com', 'Male', '1.71.141.52']... ]

# WRITE MODE
with open("output_data28.csv", "w") as f2:
    # write out a file with every row where the last name starts with J
    for row in contents:
        # last name is at row[2]
        if row[2][0].upper() == "J": # if row[2].startswith("j") or row[2].startswith("J"):
            # we like this data, we want to write it as a string
            f2.write(",".join(row) + "\n")

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