webinar-python-exam-review-2023-05-20

# Exam Review 2023 May 20

# 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() is the same print(end="\n")
# print("Something I'm printing", end=" ")
# print()
# print("Clean new line!") # I checked myself before I wrecked myself

# Comp 1: Basic syntax and knowledge: operators, data types, etc
# int
# float
# bool # True, False # x = 7 # if x > 5: # print(type(x>5))
# str # ""
# list # [ ]
# dict # {key:value}
# tuple # () immutable, Python sees a,b,c as (a,b,c)... return x,y --> return (x,y)
# set # { } all unique/no duplicates, no order... no index, no slicing, no sort
# range object # range()... range(0, 5) --> # [0, 1, 2, 3, 4]

# operators
# = # assignment, assigning a value
# == # equality, asking a question, comparing... if/elif, while
# +
# -
# *
# /
# % # modulo... gives the int remainder, "how many whole things didn't fit?"... since the last even division
# // # floor division... is that last even division
# <
# >
# <=
# >=
# += # x += 1 is x = x+1
# -=
# ** # raising to a power... pow() and math.pow()
# !=
# # # keywords used like operators
# in # if x in myList:
# not # if not x in myList:
# and
# or # any one True means the whole conditions is True... limit OR to 2 conditions

# Comp 2
# the HOW stuff... control flow structures
# 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()
# for ___ in __someContainer__:
# for item in myList:
# for char in myStr:
foodTVSubs = {
    # "": "Nancy asks if you can have a blank key", # legal!
    "canned ham": "Spam",
    "shell candies": "M&M's",
    "cereal treats": "Rice Krispies treats"
}
# for key in myDict: # loop var holds key
# We can use dict keys as if they indices
# print(foodTVSubs["canned ham"]) # retrives the value for the key
# # We can assign a new value to a key
# foodTVSubs["canned ham"] = "Turkey Spam"
# print(foodTVSubs["canned ham"])
#
# for k in foodTVSubs:
#     v = foodTVSubs[k]
#     print(f"We have to say '{k}' instead of '{v}' on Food Network.")
#
# # dict items() method
# for key, value in foodTVSubs.items():
#     print(f"We have to say '{key}' instead of '{value}' on Food Network.")

# for n in range(0, 12):
# for i in range(0, len(myList)): # for i, item in enumerate(myList):
#     print(myList[i])

# 1st value tells me how many more times to call input()
# myInput = int(input())
# for n in range(myInput):
#     nextValue = input()

# [email protected]

# FUNCTIONS
# defining/writing vs calling
# parameters are special variables... they don't work like "regular" variables
# parameters vs arguments
# return vs print()/output... vs other... do whatever the question says
# a function has ONE, PARTICULAR job

# def someFunction(x, y):
#     return x * y
#
# if __name__ == "__main__": # is this script the one that's being run from?
#     # we're solving THIS 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()
# range()
# type()
# list()
# int()
# float()
# dict()
# tuple()
# set()
# enumerate()
# round() # cousins math.ceil() and math.floor() are in math
# open() # open file, create a file type object
# len()
# sum()
# min()
# max()
# help()
# dir()
# help(list)
# print(dir(str))
# help(str.isspace)

# STRINGS
# be able to slice...
# myStr = "abc"
# revStr = myStr[::-1] # "cba"

# KNOW YOUR WHITESPACE
# " " # space bar space
# # a lot of spaces in Unicode
# "\n" # NEW line return
# "\r" # carriage return
# "\t"# tab

# STRING METHODS
# myStr.format() # "stuff I want to put together {}".format(var)...
# myStr.strip() #
# myStr.split() # returns a list of smaller strings
# myStr.join() # " ".join(listOfStrings)
# myStr.replace(subStr, newStr) # "remove"... myStr = myStr.replace(subStr, "")
# myStr.find(subStr) # returns int... index where subStr starts
# myStr.count(subStr) # return int count
# case: myStr.lower(), myStr.upper(), myStr.title(), myStr.capitalize()
# is/Boolean: myStr.isupper(), myStr.islower(), myStr.isspace(), myStr.isalpha(), isnumeric(), isdigit(), isalnum()
# startswith(), endswith()

# LIST
# be able to use index, slices

# LIST METHODS
# # +
# myList.append(item)
# myList.insert(i, item)
# myList.extend(anotherList)
# # -
# myList.pop() # pop by index... myList.pop(0)
# myList.remove(item) # remove by value
# myList.clear()
# # other
# myList.count(item)
# myList.sort()
# myList.reverse()
# # also rans
# myList.copy()
# myList.index(item)

# DICT
# use the key like an index
# myDict[key] # retrieve value for that key
# myDict[key] = value # assign value to key
# myDict.keys()
# myDict.values()
# 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) # not to be confused with math.exp()
# math.sqrt(x)
# math.fabs(x) # abs(x)
# math.pi
# math.e

# # PARTIAL IMPORT
from math import factorial # # factorial(x) # not math.factorial()
# from math import ceil, sqrt
# from math import *
# floor(x.yz) # not math.floor()

# # ALIAS IMPORT
# import math as m
# m.floor(x.yz) # not math.floor()

# FILES

# READ MODE
with open("test.txt", "r") as f:
    contents = f.readlines() # list a strings line by line
# print(contents)
# for line in contents:
#     line = line.strip()
#     print(line)

# CSV Module
import csv # csv.reader()
with open("mock_data.csv", "r") as f1:
    contents = list(csv.reader(f1)) # returns list of lists
    # for tsv
    # contents = list(csv.reader(f1, delimitter="\t"))
# print(contents) # [['id', 'first_name', 'last_name', 'email', 'gender', 'ip_address'], ['1', 'Remington', 'Shilling', '[email protected]', 'Male', '1.71.141.52']... ]
# for row in contents[0:20]:
#     print(row)

# WRITE MODE
# with open("output_data18.csv", "w") as f2:
#     for row in contents:
#         # only write into this new file if email is at tripadvisor.com
#         # email is at list position 3
#         if "@tripadvisor.com" in row[3]: # if row[3].endswith("@tripadvisor.com")
#             # takes a single str argument
#             f2.write(",".join(row) + "\n")


# APPEND MODE
# with open("append_to_this.txt", "r") as f3:
#     contents = f3.readlines()
with open("append_to_this.txt", "a") as f3:
    f3.write("Gimli\nShelob\nBilbo\nRadagast\n") # added to file, rather than overwriting
print(contents)