webinar-python-exam-review-2023-07-22

# Exam Review 2023 July 22

# 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

# Watch your string input and output
# input...
# myInput = input().strip()
# # output/print()
# print() # print(end="\n")
# print("Something I'm printing", end=" ") # if we ever override end...
# print()
# # print("This should start on a clean new line!")


# Comp 1: Basic syntax and knowledge: operators, data types, etc
# Common Data Types/Classes
# int
# float
# bool # True, False... x > 5... evaluates to Bool True or False
# str # " "
# list # [ ]
# dict # {key: value}
# tuple # ( ) immutable, Python sees x,y,z as (x,y,z) --> return x,y --> return (x, y)
# set # { } all unique values/no duplicates, no order --> no indices, no slicing, no sorting
# range # range()... range(0, 5) --> [0, 1, 2, 3, 4]

# Operators
# = # assigning
# == # equality... asking "are these equal?" in a conditional expression
# +
# -
# *
# /
# % # modulo... gives an int remainder, "How many whole things didn't fit... since the last even division?"
# // # floor division... the last even division
# <
# >
# >=
# <=
# += # x += 1 --> x = x + 1
# -=
# ** # raise to a power like math.pow()... or built-in pow()
# !=
# # keywords
# in # if x in myList
# not # if not x in myList
# and
# or # any one True means combined condition is True... limit OR to 2-3 conditions

# 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:
# for num in range(0, 8):
# for i in range(len(myList)): # myList[i]
# for i, item in enumerate(myList):

# FUNCTIONS
# defining/writing vs calling
# a function has ONE particular job
# parameters are special variables... they don't work like regular variables
# parameters vs arguments
# return vs print()/output vs something else?
#
# def someFunction(x, y):
#     return x * y
#
# if __name__ == "__main__":
#     # we're solving this particular 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
# print()
# input()
# len()
# range()
# enumerate()
# min()
# max()
# sum()
# int()
# float()
# list()
# dict()
# set()
# type() # x = 3 # print(type(x).__name__)
# round() # cousins are in the math module: math.ceil(), math.floor()
# abs() # cousin math.fabs()
# open()
# help() # help(str), help(str.isdigit)
# dir() # print(dir(str))


# STRINGS
# be able to refer to indices, and slice
# myStr = "abcdef"
# myRevStr = myStr[::-1]
# print(myRevStr)

# KNOW YOUR WHITESPACE
# " "
# a lot of Unicode spaces
# "\n" # new line return
# "\t" # tab
# "\r" # carriage return

# STRING METHODS
# myStr.format() # "stuff I want to put together {}".format(var)
# myStr.strip()
# myStr.split() # returns a list of smaller strings
# " ".join(listOfStrings)
# myStr.replace(subStr, newSubStr) # "remove"... myStr = myStr.replace(subStr, "")
# myStr.find(subStr) # returns an index where it finds it, or -1
# myStr.count(subStr) # returns number of times that occurs
# case: .lower(), .upper(), .title(), .capitalize()
# is/Boolean: .isupper(), .islower(), .isspace(), .isalpha(), .isalnum(), .isdigit(), .isnumeric()
# myStr.startswith(subStr), myStr.endswith(subStr)

# LISTS
# be able to use indices, 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.count(item)
# myList.sort()
# myList.reverse()
# myList.copy()
# myList.index()
#
# # DICT METHODS
# # use the key like an index []... then you don't need DICT methods
# myDict[key] # retrieves value for that key
# myDict[key] = value # assigns a new value
#
# myDict.keys()
# myDict.values()
# myDict.items() # for key, value in myDict.items()

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

# PARTIAL IMPORT
# from math import factorial # --> factorial(x)
# from math import ceil, floor # --> ceil(x.yz)
# from math import * # --> sqrt(x)
#
# # ALIAS IMPORT
# import math as m # m.floor(x.yz)

# FILES

# READ MODE
# filename = input()
with open("test.txt", "r") as f: # with open(filename, "r")
    contents = f.readlines()
print(contents)

for line in contents:
    line = line.strip()
    print(line)

# CSV
import csv
with open("mock_data.csv", "r") as f1: # fake data from mockaroo.com
    contents = list(csv.reader(f1)) # csv.reader(f1, delimiter="\t") for tsv files
print(contents[:20])


# WRITE MODE
with open("output_data22.csv", "w") as f2:
    for row in contents:
        # only write out if email is at reference.com
        # email is position 3
        if "@reference.com" in row[3]: # if row[3].endswith("@reference.com"):
            # write() takes a single str argument
            f2.write(",".join(row) + "\n")



# APPEND MODE
# with open("append_to_this.txt", "r") as f3: # it's always worth taking a look at what you have!
#     print(f3.readlines()) # ['Frodo\n', 'Sam\n', 'Merry\n']

with open("append_to_this.txt", "a") as f3:
    f3.write("Pippin\n")


# the end
# Best wishes to our exam takers this week!