webinar-python-exam-review-2023-09-30

# Exam Review 2023 Sept 30

# 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
# = # assigns
# == # asking, comparison... conditional expression
# +
# -
# *
# /
# // # floor division... the last even division?
# % # modulo... whole number remainder... how many whole things didn't fit since the last even division?
# <
# >
# <=
# >=
# += # x += 1 --> x = x + 1
# -=
# ** # raise to a power... math.pow()... or built-in 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 type?
# list # [ ]
# dict # {key: value}... myDict[key]
# tuple # ( ) immutable, Python sees x,y,z as (x,y,z) -> return a,b,c --> return (a,b,c)
# set # { } # no duplicates, unordered --> no index, no slicing, no sorting
# range # range()... range(0, 5, 1)... [0, 1, 2, 3, 4]
# 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 k, v in myDict.items():
# for num in range(0, 7):
# for i in range(0, len(myList)): # myList[i]
# for i, item in enumerate(myList):

# FUNCTIONS
# defining/writing vs calling
# modular... a function has ONE job
# parameters are special variable holding things sent into the function
# parameters vs arguments
#
# def someFunction(x, y):
#     return x // y
#
# if __name__ == "__main__":
#     # inside this block we're answering this specific question
#     myInput = int(input())
#     myOther = int(input())
#     # myNum = someFunction(myInput, myOther)
#     # print(myNum)
#     print(someFunction(myInput, myOther))

# 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()
# list()
# int()
# str()
# dict()
# range()
# set()
# tuple()
# type() # print(type(x).__name__)
# enumerate()
# open()
# round() # cousins math.ceil() and math.floor()
# help() # help(str), help(str.isspace)
# dir() # print(dir(str))

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

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

# STRING METHODS
# myStr.format() # "stuff I want to put together {}".format(var)
# myStr.strip() # input().strip()
# myStr.split() # returns a list of smaller strings
# " ".join(listOfStrings)
# myStr.replace(subStr, newSubStr) # "remove" myStr = myStr.replace(subStr, "")
# myStr.find(subStr) # return index (int) where found, or -1 on failure
# myStr.count(subStr) # return 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 ref by index, 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.count(item) # return int count
# myList.sort() # does not return a value!
# myList.reverse() # does not return a value!
# myList.copy()
# myList.index(item)

# DICT
# use the key like an index []... then you don't need DICT methods
# myDict[key] # retrieve the value for that key
# myDict[key] = value # assign a new value to that key

# DICT METHODS
# myDict.keys()
# myDict.values()
# myDict.items() # for key, value in myDict.items()

# if var in myDict: # only looks at keys

# MODULES

# 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) # built-in abs()
# math.pi
# math.e

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

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

# 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") for a .tsv
# print(contents[0:20])

# WRITE MODE
with open("output_data27.csv", "w") as f2:
    for row in contents:
        # write out a file with every row where the last name starts with D
        # last name is at row[2]
        # if row[2].startswith("d") or row[2].startswith("D"):  # if row[2][0].lower() == "d":
        if row[2].lower().startswith("d"):
            # we've found data to write
            f2.write(",".join(row) + "\n")


# APPEND MODE
# with open("append_to_this.txt", "r") as f3: # check to see if last line has a \n, follow suit in yours
#     print(f3.readlines())
with open("append_to_this.txt", "a") as f3:
    addMe = "Pippin"
    f3.write(f"\n{addMe}")