webinar-exam-review-2021-09-18

# webinar review 09/18/21

# Ch 8, 9, 11 and 12 end of chapter exercises are critical practice

# Be able to recognize and use common data types and modules
# # data types
# list
# strings... str
# dictionary... dict
# tuple
# set
# int
# floats
# # modules
# math
# random
# datetime
# calendar
# pandas
# os

# OPERATORS
# +
# -
# *
# /
# % # modulo... gets whole number remainder or "how many didn't fit?"
# // # floor division
# # How many pounds and oz is 52 oz?
# print(52//16) # pounds
# print(52%16) # oz leftover
# = # assigns
# == # asks, comparison
# += # x += 1 is the same as x = x + 1, incrementing
# -= # decrement
# !=
# not
# in
# <
# >
# <=
# >=
# and
# or

# CONTROL FLOW STRUCTURES

# FUNCTIONS
# defining vs calling
# parameters/arguments vs "regular" variables
# def myFunction(someList):
#   # someList = [1,2,3] # don't do this!
# myFunction([4, 5, 6])  # the call provides an ARG to give the parameter a value
# myFunction([9, 7, 8])
# return vs print()
# methods are themselves

# IF... and IF/ELSE, IF/ELIF/ELSE

# LOOPS
# FOR - looping a number of times, matched to a container
# WHILE - an IF that repeats
# for __ in ___:
# for item in myList:
# for char in myString:
# for key in myDictionary: # myDictionary[key]
# for i in range(0, 5): # for i in range(0, len(myList):

# IN
myList = ["Agent Scully", "Agent Mulder", "Walter Skinner", "CSM", "Mr. X"]
if "Agent Scully" in myList:
    print("Found her!")
print("Agent Mulder" in myList) # True
print("Agent Spender" in myList) # False

# BUILT-IN FUNCTIONS
# print()
# help() # help(str), help(str.join)
# dir() # print(dir(list))...returns a list of "attributes": methods, properties, types of a module
# len()
# sum()
# min()
# max()
# str()
# int()
# float()
# list()
# dict()
# set()
# tuple()
# range()
# round() # see math.ceil() and math.floor()
# type() # print(type(myList))
# enumerate() # for i, item in enumerate(myList)
# sorted()
# reversed()

# STRINGS and their methods
# be able to SLICE strings and lists
# building up larger strings
x = "Sue"
greeting = "How do you do?"
# CONCATENATE with +
myString = "My name is " + str(x) + ". " + greeting
# DATA CONVERSION SPECIFIERS or "string modulo"
myString = "My name is %s. %s" % (x, greeting)
# the FORMAT method
myString = "My name is {}. {}".format(x, greeting)
print(myString)

# STRING METHODS
# myString.split()
# " ".join(myList)
# myString.upper()
# myString.lower()
# myString.title()
# myString.capitalize()
# myString.isupper()
# myString.islower()
# myString.istitle()
# myString.strip() # cousins lstrip(), rstrip()
# myString.replace(oldSubString, newSubString)
# myString.count(subStr)
# myString.find(subStr)
# myString.format()

# LISTS # ... again be able to SLICE lists
# myList.append()
# myList.insert()
# myList.extend()
# myList.remove() # by value
# myList.pop() # by index
# myList.count()
# myList.sort() # myList.sort(reverse=True)
# myList.reverse()
# myList.copy()
# myList.clear()
# myList.index(aValue)

# SET
mySet = {1, 2, 3}
# mySet.add()
# mySet.remove() # by value
# mySet.discard() # by value
# mySet.pop() # set pop() takes out a random entry

# TUPLES
# so immutable you don't even want a modified copy

## MODULES
# math
# import math
# math.sqrt()
# math.pow() # not to be confused with math.exp()
# math.e # a property! Euler's Number
# math.pi # another property!
# math.ceil()
# math.floor()
# math.factorial()

# random
# import random
# random.random() # random float b/n 0 and 1
# random.choice() # random item in a list
# random.randint(start, stop) # INCLUDES the stop number
# random.randrange(start, stop)  # EXCLUDES the stop number, like normal

# calendar
# import calendar
# calendar.isleap(intYear)
# calendar.weekday(y, m, d)
# calendar.day_name[]
# calendar.month_name[]

# datetime
import datetime
# # focus
# # datetime.datetime # <-- contains datetime.date and datetime.time
# # datetime.timedelta
# dd = datetime.datetime(1912, 4, 16)
# dd = datetime.datetime.today()
# print(dd)
# print(dd.year)
# print(dd.month)
# print(dd.day)
# print(dd.hour)
#
# # datetime.timedelta
# td = datetime.timedelta(days=15) # list()
# print("10 days from today is {}.".format(dd+td))
# print(dir(datetime.timedelta))
# print("{} is {} seconds".format(td, td.total_seconds()))
#
# # os
# import os
# os.getcwd()
# os.listdir()
# # os.path
# os.path.dirname()
# os.path.basename()
# os.path.exists()
# os.path.isfile()
# os.path.isdir()
#
# # IMPORT STATEMENTS
# # make sure the way the object is referenced matches the import statement
# # "normal" full import
# import datetime # datetime.date.year
# # PARTIAL IMPORTS
# from os import path # path.isdir() not os.path.isdir()
# from math import ceil # ceil() not math.ceil()
# # ALIAS IMPORT
# import math as m # m.ceil() not math.ceil()

# student questions
# enumerate() vs range(len())
for item in myList: # "normal" loop over a list
    print(item)
for i, item in enumerate(myList): # enumerate() to get index
    print("{}: {}".format(i, item))
for i in range(0, len(myList)): # range() to get index
    print("{}--> {}".format(i, myList[i]))