webinar-python-exam-review-2021-04-17

# webinar review 04/17/21

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

# Be able to recognize and use common data types and modules
# integers
# floats
# strings
# lists
# dictionaries
# sets
# tuples
# # modules
# math
# random
# datetime
# os
# calendar
# pandas

# functions
# defining vs calling
# parameter vs arguments
# parameter variables are not like "regular" variable
# x = 5 # don't do this with parameters
# return vs print() # question wording -- look out for this
# methods of a data type are themselves functions

# need to repeat an action: LOOPS
# FOR vs WHILE loops
# I would focus on FOR LOOPS
# don't worry about nested loops for OA

# IF statements
# if
# if/else
# if/elif/else



# for item in myList:
#     print(len(item))

# __ in ___ # membership check
# print("Sam" in myList)

# OPERATORS
# + # can be addition or string concatenation
# -
# *
# /
# // # floor division
# % # MODULO gives the whole number integer REMAINDER
# print(11 % 3)
# # 37 oz
# print(37 // 16) # pounds
# print(37 % 16) # left over ounces
# print(14.25 % 7)
# ** # raise to power
# +=
# -=
# = # assigns a value
# == # comparision, asking if they're equal
# <
# >
# >=
# <=
# !=
# not
# print(not "Sam" in myList)

# Building up longer strings
# x = "Sue"
# greeting = "How do you do?"
# # concatenation: seems simple
# mystring = "My name is " + x + ". " + greeting
# # data conversion modifiers or "string modulo"
# mystring = "My name is %s. %s" % (x, greeting)
# # string class .format()
# mystring = "My name is {}. {}".format(x, greeting)
# print(mystring)

# be able to SLICE like it's second nature

# STRING methods
# myString.join()
# myString.split()
# myString.format()
# myString.replace()
# myString.find()
# myString.isupper()
# myString.islower()
# myString.isalpha()
# myString.upper()
# myString.lower()
# myString.title()
# myString.capitalize()
# myString.count()
# myString.strip() # lstrip() and rstrip()

# LIST methods
myList = ["Sam", "Bucky", "Sharon", "Bad Cap"]
# myList.count()
# myList.append()
# myList.insert()
# myList.pop() # remove by index
# myList.remove() # remove by value
# myList.sort(reverse=False) # print(sorted(myList))
# myList.reverse()
# myList.clear()
# myList.copy()
# myList.index()
# print("Bucky" in myList) # True!

# def checkThis(myIterable, someItem):
#     return someItem in myIterable
# print(checkThis(myList, "Bucky")) # True
# print(checkThis(myList, "Thor"))  # False

# SET methods
# mySet.add()
# mySet.remove()
# mySet.discard()

# DICTIONARIES
# myDictionary[key] = new value
# myDictionary.get()
# myDictionary.update({key:value})
# myDictionary.items() # for a FOR LOOP it gets you a key and a value variable

# BUILT-IN Functions
# help()
# dir()
# print()
# enumerate()
# len()
# sum()
# min()
# max()
# range()
# list() # []
# int()
# float()
# dict() # {}
# tuple() # ()
# set()
# round() # the "regular" round

# MATH module
# math.ceil() # always round up
# math.floor() # always round down
# math.sqrt()
# math.pow() # raise to a power, don't confuse with math.exp()
# math.e

# RANDOM module
# random.random() # returns a float 0 to 1
# random.choice() # random choice from a list
# random.randint()# INCLUDES the stop
# random.randrange() # EXCLUDES the stop

# DATETIME module
import datetime
# datetime.datetime # combination of datetime.date and datetime.time
dt = datetime.datetime(2021, 4, 12)
print(dt.day)
print(dt.month)
print(dt)
# datetime.timedelta # a difference in time
td = datetime.timedelta(weeks=4, days=3)
print(td.total_seconds())
print(dt + td)

# 3 ways to import
import datetime
import datetime as dd # dd.date, dd.timedelta
from datetime import timedelta # just timedelta


# OS module
# os.getcwd()
# os.listdir()
# os.path.basename()

# HTML is just strings

# questions from attendees:

# enumerate() is just to get you a variable for the index...
# for item in myList:
for i, item in enumerate(myList):
    print("{}: {}".format(i, item))

# although there are other ways to get an index variable in your loop:
for i in range(len(myList)):
    print("{}--> {}".format(i, myList[i]))

for item in myList:
    print("{}... {}".format(myList.index(item), item)) # that's the kind of thing the list index() method is for