webinar-python-exam-review-2021-03-27

# Exam Review, Mar 27, 2021

# Be able to recognize and use common data types
# integers
# floats
# strings
# lists
# dictionary
# sets
# tuples
# # and imported modules
# math
# random
# datetime
# os
# pandas - not too much
# calendar - not too much

# functions
# defining vs calling
# parameters/arguments vs "regular variables"
# watch the question wording: print() or return

def addThese(x, y):
    # x = 3 # don't do that
    return x + y

print(addThese(1, 2)) # 3
print(addThese(3, 3)) # 6

# repeat action with a LOOP
# FOR loop is more useful than a WHILE loop for the OA

myList = ["Gilligan", "Scooby", "Agent Scully"] # tv characters
for item in myList:
    #print(item)
    print("The string '{}' has {} characters.".format(item, len(item)))

# operators
# +
# -
# /
# *
# // floor division
# %
# # Don't forget MODULO it's more important than you think
# How many pounds is 41 ounces?
print("lbs: ", 41 // 16)
print("oz: ", 41 % 16)

myString = "Hello. My name is Sue."
# STRING methods
# myString.split()
# myString.join()
# myString.find()
# myString.replace()
# myString.format()
# myString.strip() # myString.lstrip(), myString.rstrip()
# myString.count()
# myString.isupper() # isuower()
# myString.upper()
# myString.lower()
# myString.capitalize()
# myString.title()

# help(str)
# print(dir(str))

# LIST methods
# myList.append()
# myList.insert()
# myList.pop() # by index
# myList.remove() # by value
# myList.count()
# myList.sort(reverse=False)
# myList.reverse()
# myList.index()

# if someItem in myList: # membership check

# Complete the function to order the values in the list
# if ascending is true then order lowest to highest
# if ascending is false then order highest to lowest
def sortList(mylist, ascending):
    if ascending:
        mylist.sort()
    else:
        mylist.sort(reverse=True)
    return mylist

# expected output: [4, 12, 19, 33]
print(sortList([19,4,33,12], True))
# expected output: [33, 19, 12, 4]
print(sortList([19,4,33,12], False))


# SETS
# mySet.add()
# mySet.remove()
# mySet.discard()

# BUILT IN functions
# print()
# help()
# dir()
# len()
# sum()
# min()
# max()
# round()
# enumerate()
# sorted()
# reversed()
# int()
# float()
# str()
# list()
# set()
# tup()
# dict()
# range(start, stop)

# Know SLICING like it's second hand

# 3 ways to round
# round()
# math.ceil()
# math.floor()

myList.append("Mulder")
print(myList[0:2])
for item in myList:
    print(item[0:3])

import math
# MATH methods
# math.ceil()
# math.floor()
# math.sqrt()
# math.pow(x, y) # x to the y power, see also **
# math.e
# math.exp() is just to raise math.e to a power

print(3 * math.e)

# RANDOM methods
import random
# random.randint() # i for inclusive of STOP
# random.randrange() # like everything else is EXCLUSIVE of STOP
# random.choice(myList)
# random.random() # returns float between 0 and 1

# DATETIME
import datetime
print(dir(datetime.datetime))
# datetime.datetime # includes datetime.date and datetime.time
# datetime.timedelta

dd = datetime.datetime(2021, 1, 5)
print(dd)
dd = datetime.datetime.today()
print(dd)

td = datetime.timedelta(days=12)
print(td.total_seconds())

print(dir(datetime.timedelta))
print(td.min)

myHTMLString = "<p>Martians invade.</p>"
# change paragraph to a level 1 heading
myHTMLString = myHTMLString.replace("<p>", "<h1>")
myHTMLString = myHTMLString.replace("</p>", "</h1>")

# or to create nested parent and child tags:
print(myList) # back to that iterable above
myHTMLString = "<ul>\n"
for item in myList:
    myHTMLString += "<li>{}</li>\n".format(item)
myHTMLString += "</ul>"
print(myHTMLString)

# Complete the function to return the number of upper case letters in the given string
def countUpper(mystring):
    count = 0
    for char in mystring:
        if char.isupper():
            count += 1
    return count


print(countUpper('Welcome to WGU'))# expected output: 4
print(countUpper('Hello Mary'))# expected output: 2

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