Python

Lesson01

Lesson02

Lesson03

Lesson04

Convert an integer to binary

Odd and Event Numbers

While loop join string

Lesson01

greeting = 'Hello World!'

print(greeting)

Lesson02

line01 = "********************" # header / footer

line02 = "* *" # re-use

line03 = "* WELCOME! *"

# starts with a blank line

print('')

print(line01)

print(line02)

print(line03)

print(line02)

print(line01)

Lesson03

meaning = 42

print('')

# if meaning > 10:

# print('Right on!')

# else:

# print('Not today')

# Ternary Operator

print('Right on!') if meaning > 10 else print('Not today')

Lesson04

import math

# String data type

# literal assignment

first = "Mike"

last = "Yom"

print(type(first))

print(type(first) == str)

print(isinstance(first, str))

# constructor function

pizza = str("Pepperoni")

print(type(pizza))

print(type(pizza) == str)

print(isinstance(pizza, str))

# Concatenation

fullname = first + " " + last

print(fullname)

fullname += "!"

print(fullname)

# Casting a number to a string

decade = str(1980)

print(type(decade))

print(decade)

statement = "I like rock music from the " + decade + "s."

print(statement)

# Multiple lines

multiline = '''

Hey, how are you?

I was just checking in.

All good?

'''

print(multiline)

# Escaping special characters

sentence = 'I\'m back at work!\tHey!\n\nWhere\'s this at\\located?'

print(sentence)

# String Methods

print(first)

print(first.lower())

print(first.upper())

print(first)

print(multiline.title())

print(multiline.replace("good", "ok"))

print(multiline)

print(len(multiline))

multiline += " "

multiline = " " + multiline

print(len(multiline))

print(len(multiline.strip()))

print(len(multiline.lstrip())) # left side

print(len(multiline.rstrip())) # right side

# Build a menu

title = "menu".upper()

print(title.center(20, "="))

print("Coffee".ljust(16, ".") + "$1".rjust(4))

print("Muffin".ljust(16, ".") + "$2".rjust(4))

print("Cheesecake".ljust(16, ".") + "$4".rjust(4))

print("")

# string index values

print(first[1]) # 2nd letter

print(first[-1]) # last letter

print(first[1:-1]) # 2nd to last

print(first[1:]) # 2nd and all after 2nd

# Some methods return boolean data

print(first.startswith("M")) # Start with M. Mike so True

print(first.endswith("Z")) # Starts with Z which is not False

# Boolean data type

myvalue = True

x = bool(False) # Constructor method

print(type(x))

print(isinstance(myvalue, bool))

# Numeric data types

# integer type

price = 100

best_price = int(80) # constructor function

print(type(price))

print(isinstance(best_price, int))

# float type

gpa = 3.28

y = float(1.14)

print(type(gpa))

# complex type

comp_value = 5+3j

print(type(comp_value))

print(comp_value.real) # real number

print(comp_value.imag) # imagineary number

# Built-in functions for numbers

print(abs(gpa))

print(abs(gpa * -1))

print(round(gpa)) # nearest

print(round(gpa, 1)) #near decimal point

print(math.pi)

print(math.sqrt(64))

print(math.ceil(gpa)) # ceiling

print(math.floor(gpa)) # floor

# Casting a string to a number

zipcode = "10001"

zip_value = int(zipcode) #cast string into integer

print(type(zip_value))

# Error if you attempt to cast incorrect data

# zip_value = int("New York")

Lesson05

import sys

import random

from enum import Enum

class RPS(Enum):

ROCK = 1

PAPER = 2

SCISSORS = 3

print("")

# print(RPS(2))

# print(RPS.ROCK)

# print(RPS['ROCK'])

# print(RPS.ROCK.value)

# sys.exit()

# User enters option

playerchoice = input(

"Enter...\n1 for Rock,\n2 for Paper, or \n3 for Scissors:\n\n")

player = int(playerchoice)

# If user enters less than 1 or greater than 3 exit

if player < 1 or player > 3:

sys.exit("You must enter 1, 2, or 3.")

# Computer choice random number between 1-3

computerchoice = random.choice("123")

computer = int(computerchoice)

print("")

print("You chose " + str(RPS(player)).replace('RPS.', '') + ".")

print("Python chose " + str(RPS(computer)).replace('RPS.', '') + ".")

print("")

if player == 1 and computer == 3:

print("🎉 You win!")

elif player == 2 and computer == 1:

print("🎉 You win!")

elif player == 3 and computer == 2:

print("🎉 You win!")

elif player == computer:

print("😲 Tie game!")

else:

print("🐍 Python wins!")

Lesson06

users = ['Dave', 'John', 'Sara']

data = ['Dave', 42, True]

emptylist = []

print("Dave" in emptylist)

# print("Dave" in users)

print(users[0])

print(users[-2])

print(users.index('Sara'))

print(users[0:2])

print(users[1:])

print(users[-3:-1])

print(len(data))

users.append('Elsa')

print(users)

users += ['Jason'] # make sure it's list

print(users)

users.extend(['Robert', 'Jimmy'])

print(users)

# users.extend(data)

# print(users)

users.insert(0, 'Bob') # add to 1st position

print(users)

print("")

users[2:2] = ['Eddie', 'Alex'] # does not replace value

print(users)

print("")

users[1:3] = ['Robert', 'JPJ'] # this replace the value

print(users)

print("")

users.remove('Bob')

print(users)

print("")

print(users.pop()) # Remove last item

print(users)

print("")

del users[0]

print(users)

print("")

# # del data

# data.clear() # this will empty the list

# print(data)

print("")

users[1:2] = ['dave'] #insert

users.sort()

print(users)

users.sort(key=str.lower)

print(users)

nums = [4, 42, 78, 1, 5]

nums.reverse()

print(nums)

nums.sort(reverse=True)

print(nums)

print(sorted(nums, reverse=True))

print(nums)

numscopy = nums.copy()

mynums = list(nums)

mycopy = nums[:]

print("")

print(numscopy)

print(mynums)

mycopy.sort()

print(mycopy)

print(nums)

print(type(nums))

mylist = list([1, "Neil", True])

print(mylist)

# # Tuples order data in will not change

mytuple = tuple(('Dave', 42, True))

anothertuple = (1, 4, 2, 8, 2, 2)

print("")

print(mytuple)

print(type(mytuple))

print(type(anothertuple))

print("")

newlist = list(mytuple)

newlist.append('Neil')

newtuple = tuple(newlist)

print(newtuple)

(one, two, *hey) = anothertuple

print(one)

print(two)

print(hey)

print("")

(one, *two, hey) = anothertuple

print(one)

print(two)

print(hey)

print("")

print(anothertuple.count(2))

Lesson07

# Dictionaries

band = {

"vocals": "Plant",

"guitar": "Page"

}

band2 = dict(vocals="Plant", guitar="Page")

print(band)

print("")

print(band2)

print(type(band))

print(len(band))

print("")

# # Access items

print(band["vocals"])

print(band.get("guitar"))

# # list all keys

print(band.keys())

# # list all values

print(band.values())

# # list of key/value pairs as tuples

print(band.items())

# # verify a key exists

print("guitar" in band)

print("triangle" in band)

# # Change values

band["vocals"] = "Coverdale"

band.update({"bass": "JPJ"})

print("")

print(band)

# # Remove items

print(band.pop("bass"))

print(band)

band["drums"] = "Bonham"

print(band)

# print(band.popitem()) # tuple

print(band)

# # Delete and clear

band["drums"] = "Bonham"

del band["drums"]

print(band)

band2.clear()

print(band2)

del band2

# # Copy dictionaries

# band2 = band # create a reference

# print("Bad copy!")

# print(band2)

# print(band)

# band2["drums"] = "Dave"

# print(band)

band2 = band.copy()

band2["drums"] = "Dave"

print("Good copy!")

print(band)

print ("")

print(band2)

# or use the dict() constructor function

band3 = dict(band)

print("Good copy!")

print(band3)

# Nested dictionaries

member1 = {

"name": "Plant",

"instrument": "vocals"

}

member2 = {

"name": "Page",

"instrument": "guitar"

}

band = {

"member1": member1,

"member2": member2

}

print("")

print(band)

print("")

print(band["member1"]["name"])

# Sets

nums = {1, 2, 3, 4}

nums2 = set((1, 2, 3, 4))

print(nums)

print(nums2)

print(type(nums))

print(len(nums))

# No duplicate allowed

nums = {1, 2, 2, 3}

print(nums)

# True is a dupe of 1, False is a dupe of zero

# 1 is front of True so 1 is printed and False is front of 0 so False

# is printed

nums = {1, True, 2, False, 3, 4, 0, 3, 5}

print("")

print(nums)

# check if a value is in a set

print(2 in nums)

# # but you cannot refer to an element in the set with an index position or a key

# Add a new element to a set

nums.add(8)

print(nums)

# Add elements from one set to another

morenums = {5, 6, 7}

nums.update(morenums)

print("")

print(nums)

# # you can use update with lists, tuples, and dictionaries, too.

# Merge two sets to create a new set

one = {1, 2, 3}

two = {5, 6, 7}

mynewset = one.union(two)

print(mynewset)

# Keep only the duplicates

one = {1, 2, 3}

two = {2, 3, 4}

one.intersection_update(two)

print(one)

# Keep everything except the duplicates

one = {1, 2, 3}

two = {2, 3, 4}

one.symmetric_difference_update(two)

print(one)

Lesson 8

2.42 mins

Brute force forloop

a = 8

b = 7

c = 38

d = 3

e = -5

f = -1

# 8x + 7y = 38

# 3x - 5y = -1

found = False

for x in range(-10, 11):

for y in range(-10, 11):

ans1 = (8 * x) + (7 * y)

ans2 = (3 * x) - (5 * y)

if (ans1 == 38) and (ans2 == -1):

print('The x is', x)

print('The y is', y)

found = True

if found == False:

print('No solution')

Check Order

def in_order(nums):

print(nums)

my_max = len(nums) -1

print(my_max)

for i in range(my_max):

print("This is i:",i)

print("This is number",nums[i])

print("")

if(nums[i] > nums[i+1]):

return True

break

return False

nums1 = [5, 6, 7, 8, 3]

#nums1 = [5, 6, 7, 8, 10]

if in_order(nums1):

print("Not in Order")

else:

print("In Order")

Check Remote Port 22

#!/bin/python3

# mikeyom@gmail.com 08-2023

import socket

import sys

socket.setdefaulttimeout(5)

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

result = sock.connect_ex(('sftp.mikeyom.com',22))

if result == 0:

print ("AS SFTP Port 22 is open")

exit(0)

else:

print ("AS SFTP Port 22 is closed")

exit(2)

sock.close()

Convert an integer to binary

number = int(input())

number_list =[]

while number > 0:

number_list.append(number)

number = number // 2

for num in number_list:

if num % 2 == 0:

print('0', end='')

else:

num % 2 == 1

print('1', end='')

Dictionary For Loop

mystr = "Mike,123-4567 Jenny,443-1234 Alec,331-1234"

contact_list = mystr.split()

print(contact_list)

my_dict = {}

for pair in contact_list:

split_pair = pair.split(',')

key = str(split_pair[0])

my_dict[key]=str(split_pair[1])

print("This is pair:",pair)

print("This is split pair:",split_pair)

print ("")

print(my_dict)

#name = input()

name = "Jenny"print(my_dict[name])

Email Script

import smtplib

from email.mime.text import MIMEText

# Set the SMTP server and login credentials

smtp_server = "smtp.gmail.com"

smtp_port = 587

username = "your@email.com"

password = "yourpassword"

# Set the email parameters

recipient = "recipient@email.com"

subject = "Test email from Python"

body = "This is a test email sent from Python."

# Create the email message

msg = MIMEText(body)

msg["Subject"] = subject

msg["To"] = recipient

msg["From"] = username

# Send the email

server = smtplib.SMTP(smtp_server, smtp_port)

server.starttls()

server.login(username, password)

server.send_message(msg)

server.quit()

Exception

def fat_burning_heart_rate(age):

heart_rate = (220-age)*.7

return heart_rate

def get_age():

# age = int(input())

age = 35

if ((age < 18) or (age > 75)):

raise ValueError('Invalid age.')

return age

if __name__ == "__main__":

try:

age = get_age()

heart_rate = fat_burning_heart_rate(age)

print('Fat burning heart rate for a', age, 'year-old:',heart_rate, 'bpm')

except ValueError as e:

print(e)

print('Could not calculate heart rate info.')

Exception an Integer

# Input

# Lee 18

# Lua 21

# Mary Beth 19

# Stu 33

# -1

# Output

# Lee 19

# Lua 22

# Mary 0

# Stu 34

parts = input().split()

name = parts[0]

while name != '-1':

try:

age = int(parts[1]) + 1

print('{} {}'.format(name, age))

parts = input().split()

name = parts[0]

except ValueError as e:

age = 0

print('{} {}'.format(name, age))

parts = input().split()

name = parts[0]

File Transfer

import socket

# create socket

s = socket.socket()

# bind socket to a address and port

s.bind(('localhost', 12345))

# put the socket into listening mode

s.listen(5)

print('Server listening...')

# forever loop to keep server running

while True:

# establish connection with client

client, addr = s.accept()

print(f'Got connection from {addr}')

# receive the file name

file_name = client.recv(1024).decode()

try:

# open the file for reading in binary

with open(file_name, 'rb') as file:

# read the file in chunks

while True:

chunk = file.read(1024)

if not chunk:

break

# send the chunk to the client

client.sendall(chunk)

print(f'File {file_name} sent successfully')

except FileNotFoundError:

# if file not found, send appropriate message

client.sendall(b'File not found')

print(f'File {file_name} not found')

# close the client connection

client.close()

Integer to Binary

def string_reverse(input_string):

str_to_list = list(input_string)

reverse_list = str_to_list[::-1]

list_to_str = ''.join(reverse_list)

return list_to_str

string_reverse('12345')

def int_to_reverse_binary(integer_value):

binary_num = ""

while integer_value > 0:

binary_num = binary_num + str(integer_value % 2)

integer_value = integer_value // 2

return binary_num

print(int_to_reverse_binary(6))

def string_reverse(input_string):

str_to_list = list(input_string)

reverse_list = str_to_list[::-1]

list_to_str = ''.join(reverse_list)

return list_to_str

def int_to_reverse_binary(integer_value):

binary_num = ""

while integer_value > 0:

binary_num = binary_num + str(integer_value % 2)

integer_value = integer_value // 2

return binary_num

if __name__ == '__main__':

integer_value = int(input())

a = int_to_reverse_binary(integer_value)

print(string_reverse(a))

int_to_reverse_binary(19)

Name List

str="Mike Sung Yom"

#str="Jenny Yom"

name=str.split()

mylen = len(name)

if mylen == 3:

result = name[2]+". "+name[0][0]+". "+name[1][0]+"."

else:

result = name[1]+". "+name[0][0]+". "

print(result)

Odd and Event Numbers

size = 5

def get_numbers(num):

numbers = []

user_input = input(f'Enter {num} integers:\n')

i = 0

for token in user_input.split():

number = int(token) # Convert string input into integer

numbers.append(number) # Add to numbers list

print(i, number)

i += 1

return numbers

def print_all_numbers(numbers):

# Print numbers

my_num = ' '.join(str(e) for e in numbers)

print('Numbers:', my_num)

def print_odd_numbers(numbers):

odd_num=[]

for num in numbers:

if num % 2 != 0:

odd_num.append(num)

# Print all odd numbers

my_odd = ' '.join(str(f) for f in odd_num)

print('Odd numbers:',my_odd)

def print_negative_numbers(numbers):

neg_num=[]

for num in numbers:

if num < 0:

neg_num.append(num)

my_neg = ' '.join(str(g) for g in neg_num)

# Print all negative numbers

print('Negative numbers:',my_neg)

nums = get_numbers(size)

print_all_numbers(nums)

print_odd_numbers(nums)

print_negative_numbers(nums)

# 5 99 -44 0 12

# Numbers: 5 99 -44 0 12

# Odd numbers: 5 99

# Negative numbers: -44

# size = 5

Swap String

System Monitor

import psutil

# Get the current CPU usage

cpu_usage = psutil.cpu_percent()

# Get the current memory usage

memory_usage = psutil.virtual_memory().percent

# Get the current disk usage

disk_usage = psutil.disk_usage("/").percent

# Get the network activity

# Get the current input/output data rates for each network interface

io_counters = psutil.net_io_counters(pernic=True)

for interface, counters in io_counters.items():

print(f"Interface {interface}:")

print(f" bytes sent: {counters.bytes_sent}")

print(f" bytes received: {counters.bytes_recv}")

# Get a list of active connections

connections = psutil.net_connections()

for connection in connections:

print(f"{connection.laddr} <-> {connection.raddr} ({connection.status})")

# Print the collected data

print(f"CPU usage: {cpu_usage}%")

print(f"Memory usage: {memory_usage}%")

print(f"Disk usage: {disk_usage}%")

Triangle Area

a = 3.0

b = 4.0

c = 5.0

s = (a + b + c) / 2

area = (s*(s-a)*(s-b)*(s-c)) ** 0.5

print(f'The area of the triangle is: {area:.3f}')

import math

a = 3.0

b = 4.0

c = 5.0

s = (a + b + c) / 2

area = math.sqrt(s*(s-a)*(s-b)*(s-c))

print(f'The area of the triangle is: {area:.3f}')

Web Scraping

import requests

from bs4 import BeautifulSoup

# Fetch a web page

page = requests.get("http://www.example.com")

# Parse the HTML content

soup = BeautifulSoup(page.content, "html.parser")

# Find all the links on the page

links = soup.find_all("a")

# Print the links

for link in links:

print(link.get("href"))

While loop join string

num_rows = int(input())

3

num_cols = int(input())

4

Output

1A 1B 1C 1D

2A 2B 2C 2D

3A 3B 3C 3D

num_rows = int(input())

num_cols = int(input())

num = 0

while num < num_rows:

num += 1

start = 65

last_chr = 65 + num_cols

while start < last_chr:

print(f'{num}{chr(start)}', end=' ')

start += 1

print(f"\n")

# String Methods

print(first)

print(first.lower())

print(first.upper())

print(first)