webinar-python-exam-review-2021-04-24

# webinar review 04/22/21

# 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

# operators
# = # assignment
# == # equality - asking if it's equal
# +
# -
# *
# /
# // # floor division
# % # modulo - gives the (whole number) REMAINDER, how many didn't fit?
# print(41 // 16, "pounds and")
# print(41 % 16, "ounces")
# **
# !=
# <
# >
# <=
# >=
# not
# += # x += 1 is the same as x = x + 1
# -=

# FUNCTIONS
# defining vs calling
# parameters vs arguments
# x = 5 # don't do that with parameters
# return vs print()
# methods of a data type are themselves functions

# IF and IF/ELSE and IF/ELIF/ELSE

# LOOPS are for repeating action
# WHILE LOOP is an IF that repeats as long as the condition is TRUE
# FOR LOOP is tied to a container
# for __ in __:
# for item in myList:
# for i in range(0, 5):

# "membership check"
myTuple = ("Gilligan", "Castaway002", "red", "crew")
# item __ in __
print("Gilligan" in myTuple) # True
print("Skipper" in myTuple) # False
if "red" in myTuple:
    print("I found red")


# print(dir(str))
# STRINGS methods
# myString.format()
# myString.join()
# myString.split()
# myString.find()
# myString.replace() # used to "remove"
# myString.isUpper() # and .isLower()
# myString.upper()
# myString.lower()
# myString.title()
# myString.capitalize()
# myString.strip() # .lstrip() and rstrip()
# myString.count()

# Be able to SLICE like it's second nature

# BUILDING UP LARGER STRINGS
x = "Sue"
greeting = "How do you do?"
# myString = "My name is " + x + ". " + greeting
# myString = "My name is %s. %s" % (x, greeting)
myString = "My name is {}. {}".format(x, greeting)
print(myString)

# LISTS
myList = ["Sam", "Bucky", "Sharon", "Bad Cap"]
# myList.append()
# myList.insert()
# myList.pop() # by index
# myList.remove() # by value
# myList.count()
# myList.sort(reverse=False)
# myList.reverse()
# myList.index()
# myList.copy()
# myList.clear()

# DICTIONARIES
scoobies = {
    "Scooby": "a blue collar",
    "Shaggy": "green",
    "Velma": "orange",
    "Daphne": "purple",
    "Fred": "an ascot"
}
# scoobies["Scooby Dumb"] = "red"
# for key in scoobies:
#     # nameOfDict[key] --> get value for key
#     print("{} always wears {}.".format(key, scoobies[key]))

# SETS - remember sets have no order, no duplicates (all unique)
# mySet.add()
# mySet.remove()
# mySet.discard()

# MODULES
# MATH
# math.e
# math.sqrt()
# math.pow() # raise x to y power
# math.floor() # always rounds down
# math.ceil() # always rounds up
# math.exp() # don't confuse with .pow(), this raise math.e to a power

# RANDOM
# random.random() # returns float between 0 and 1
# random.choice() # gets random value from a list
# random.randint() # randInt is INCLUSIVE of the stop number
# random.randrange() # randrangE EXCLUDES the stop, like normal

# DATETIME module
import datetime
# print(dir(datetime))
# focus on
# datetime.datetime # represents a point in time
# datetime.timedelta # represents a period of time: a difference or delta
dt = datetime.datetime(2021, 1, 1)
print(dt)
dt = datetime.datetime.today()
print(dt)
print(dt.month)
print(dt.hour)
td = datetime.timedelta(days=7)
print(dt + td)
print(td.total_seconds())
print(dir(datetime.timedelta))

# OS
# os.getcwd()
# os.listdir()
# os.path.isdir()

# BUILT IN FUNCTIONS
# print()
# help()
# dir()
# len()
# min()
# max()
# sum()
# range()
# str()
# list()
# dict()
# tuple()
# set()
# int()
# float()
# enumerate()
# round()

for i, item in enumerate(myList):
    print(i, item)
for i in range(len(myList)):
    print(i, "->", myList[i])

# HTML is just strings

# IMPORT statements
import math # import it all
from datetime import date # partial --> not datetime.date.today() but date.today()
import random as rr # rr.randrange()
print(round(math.pi, 10))

def addToPi(someNum):
    import math
    return math.pi + someNum

print(addToPi(0))
print(addToPi(1))
print(addToPi(5))
print(addToPi(math.e))

def addToList(someList, someValue):
    if someValue in someList:
        print(someList)
    else:
        someList.append(someValue)
        print(someList)

addToList(myList, "Wanda")
addToList([1, 2, math.pi], math.pow(math.e, 3))
addToList([1, 2, math.pi], math.exp(3))
addToList([1, 2, math.pi], round(math.exp(3), 2))
# strings and float precision
print("%.2f" % math.e)
print("{:.2f}".format(math.e))
#
# print(dir(math))