webinar-exam-review-2022-11-26

# Exam Review Nov 26 2022

# LABS
# Ch 2-14... all Labs!
# Ch 21-34 just ADDITIONAL LABS, but important practice!
# Use Submit Mode!!!

# Watch your string input and output
# 1
# myVar = input().strip()
# # 2
# print("some stuff", end=" ") # if you ever override end...
# print() # print(end="\n")

# print("Clean new line!")

# 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
# Common Data Types
# str # ""
# int
# float
# list # [ ]
# dict # {k:v, k:v}
# tuple # ( ) immutable, Python sees any x,y,z as (x,y,z)... return x,y -> return (x,y)
# set # { } no order (so no indices, etc), all unique values (no duplicates)

# operators
# = # assigns
# == # "equality operator"... asking a question for a CONDITION: if/elif, while
# +
# -
# *
# /
# % # modulo, int remainder... "how many whole things left over?"
# // # floor division... x//y -> math.floor(x/y)
# <
# >
# <=
# >=
# += # increment
# -= # decrement
# ** # raising to a power... x**y -> math.pow(x, y)
# !=
# # keywords used like operators
# in # if _someValue_ in _someContainer_
# not # if not _someValue_ in _someContainer_
# and
# or # ny one True means whole condition is True... limit OR to 2 conditions

# Comp 2
# # the HOW stuff... control flow structures
# IF statements... if, if/else, if/elif/elif/else
# LOOPS
# WHILE - an IF that repeats
# FOR - looping over a container, or a known number of times... range()
# for _item_ in _container_:
# for item in myList:
# for n in range(0, 5): # [0, 1, 2, 3, 4]
# for i in range(0, len(myList)): # myList[i]
# for key in myDict: # myDict[key]

# FUNCTIONS
# defining/writing vs calling
# parameters are special "variables"... they don't work like "regular" variables
# parameters vs arguments
# a function has ONE particular job
# return vs print()... writes a file... whatever the question says
# method are functions that belong to a particular type/class

# def someFunction(x, y):
#     return x + y
#
# if __name__ == "__main__":
#     myInput = int(input())
#     myOtherInput = int(input())
#     num = someFunction(myInput, myOtherInput)
#     print(num)

# 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()
# sum()
# min()
# max()
# range()
# list()
# str()
# int()
# float()
# dict()
# set()
# type() # print(type("3").__name__)
# round() # buts its cousins math.ceil() and math.floor() are in the math module
# open() # IO/file --> .read(), .readlines(), .write()
# reversed() # returns reversed list... compare list.reverse() does not return anything
# sorted() # returns sorted list... compare list.sort() does not return anything
# help(str) # help(str.startswith)
# print(dir(str))

# STRINGS
# be able to slice like it's 2nd nature: myString[start:stop:step]
# myString = "abc"
# revString = myString[::-1]
# print(revString)

# KNOW YOUR WHITESPACE
# " " #... and many Unicode spaces
# "\n"
# "\r"
# "\t"
# "\f"

# STRING METHODS
# "stuff I want to put together {}".format(var) # or similar f strings
# myString.strip()
# myString.split() # returns a list of smaller strings
# ",".join(listOfStrings)
# myString.replace(oldSubStr, newSubStr) # remove... myString.replace(oldSubStr, "")
# myString.find(subStr) # return int index, or -1 if not found
# myString.count(subStr) # return int count of number occurences
# case: myString.lower(), myString.upper(), myString.title()...
# is/Boolean: isupper(), islower(), isalpha(), isdigit(), isalnum(), isspace()

# LISTS
# again know indices and be able to slice

# LIST METHODS
# # +
# myList.append(item)
# myList.insert(i, item)
# myList.extend(anotherList)
# # -
# myList.pop() # myList.pop(i)... pop() by INDEX
# myList.remove(item) # remove() by VALUE
# # other
# myList.count(item) # returns int number of occurrences
# myList.sort() # MODIFY in place... no return
# myList.reverse() # "
# # not as important
# myList.clear()
# myList.copy()
# myList.index(item)

# DICT
# use the key like an index
# myDict[key] # retrieve the value for that key, so like get()
# myDict[key] = value # assign (new) value for that key, so like update({k:v})
# myDict.keys()
# myDict.values()
# myDict.items() # or for k, v in myDict.items()

# # MODULES
# # math and csv
# # remember there are different import styles that change how you reference them

# MATH MODULE
import math
# math.factorial(x)
# math.ceil(x.yz)
# math.floor(x.zy)
# math.pow(x, y) # similar to **, not be confused with math.exp()
# math.sqrt(x)
# math.fabs() # similar to built-in abs()
# math.pi
# math.e

# PARTIAL IMPORT
# from math import factorial
# don't say math.factorial()... we didn't import math
# factorial()

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

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

# CSV MODULE
import csv
with open("mock_data.csv", "r") as f1:
    contents = list(csv.reader(f1)) # csv.reader(f1, delimiter="\t")
    # contents = f.readlines()  # list of strings, line by line... ['Hello.\n', ...]
# print(contents) # [['1', 'Remington', 'Shilling', 'rshilling0@wsj.com', 'Male', '1.71.141.52']... ]

# WRITE MODE
with open("output_data8.csv", "w") as f2:
    for line in contents:
        if line[3].endswith(".org"):  #line[3][-4:] == ".org"
            # write() method takes one single str argument
            f2.write(",".join(line)+"\n")


# APPEND MODE
# with open("append_to_this.txt", "r") as f3:
#     print(f3.readlines()) # --> ['Frodo\n', 'Sam\n', 'Merry\n'] # good to look at files to check last line! \n or no?
with open("append_to_this.txt", "a") as f3:
    f3.write("Pippin\n")