cipher tool python(1-3)

PHOTO

Wed Dec 21 2022 10:56:38 GMT+0000 (Coordinated Universal Time)

Saved by @ronin_78 #python

def encrypt(message, key):
    cipher = ""
    
    for i in range(len(message)):
            char = message[i]
            keychar = key[i]
            
            if (char.isupper()):
                cipher += chr((ord(char) + ord(keychar) - 130) % 26 + 65)
                
            else:
                cipher += chr((ord(char) + ord(keychar) - 194) % 26 + 97)
        
    return cipher

def decrypt(cipher, key):
    message = ""
    
    for i in range(len(cipher)):
            char = cipher[i]
            keychar = key[i]
            
            if (char.isupper()):
                message += chr((ord(char) - ord(keychar) - 130) % 26 + 65)
                
            else:
                message += chr((ord(char) - ord(keychar)) % 26 + 97)
                
    return message
    
def newkey(text, key):
    newkey = ""
    length = 1
        
    while length <= len(text):
        for i in range(len(key)):
            if length <= len(text):
                newkey += key[i]
                length += 1
            else:
                break;
    return newkey
    
x = 1
while(x==1):
    print("1.Caesar Cipher \n 2.Vernam Cipher \n 3.Vigenere Cipher \n 4.Transposition Cipher \n 5.RSA \n")
    Choice = int(input("Choose one of the options above: "))
 
    if Choice == 1:
        print("\n1.Encrypt a message \n 2.Decrypt a message\n")
        option = int(input("Choose one option from above: "))
    
        if option == 1:
            cipher = ""
            message = input("Enter your message: ")
            shift = int(input("Enter the shift value: "))
        
            for i in range(len(message)):
                char = message[i]
            
                if (char.isupper()):
                    cipher += chr((ord(char) + shift - 65) % 26 + 65)

                else:
                    cipher += chr((ord(char) + shift - 97) % 26 + 97)
                
            print("Your cipher text = ",cipher)
 
        if option == 2:
            message = ""
            cipher = input("Enter your Cipher text: ")
            shift = int(input("Enter the shift value: "))
        
            for i in range(len(cipher)):
                char = cipher[i]
            
                if (char.isupper()):
                    message += chr((ord(char) - shift - 65) % 26 + 65)
        
                else: 
                    message += chr((ord(char) - shift - 97) % 26 + 97)
            print("Your decrypted message = ",message)
 
    elif Choice == 2:
        print("1.Encrypt a message")
        print("2.Decrypt a cipher")
        option = int(input("Choose one option from above: "))
    
        if option == 1:
            message = input("Enter your message : ")
            key = input("Enter the key: ")
        
            print("Your cipher text = ",encrypt(message, key))
        
        elif option == 2:
            cipher = input("Enter the cipher text: ")
            key = input("Enter the key: ")
        
            print("Your decrypted message = ",decrypt(cipher, key))
 
    elif Choice == 3:
        print("1.Encrypt a message")
        print("2.Decrypt a cipher")
        option = int(input("Choose one option from above: "))
    
        if option == 1:
            message = input("Enter your message: ")
            key = input("Enter the key: ")
        
            key = newkey(message, key)
            print("Your cipher text = ",encrypt(message,key))
        
        elif option == 2:
            message = ""
            cipher = input("Enter the cipher text: ")
            key = input("Enter the key: ")
        
            key = newkey(cipher, key)
            print("Your decrypted message = ",decrypt(cipher,key))
            
    opt = input("\nDo you want to continue?(y/n): ")
    if opt == 'n':
        x = 0
    elif opt == 'y':
        x = 1

work

Save snippets that work from anywhere online with our extensions

Available in the Chrome Web Store

Get Firefox Add-on

Get VS Code extension

Comments

More like this

Importing images from a directory (Python) to list or dictionary

from PIL import Image
import glob
image_list = []
for filename in glob.glob('yourpath/*.gif'): #assuming gif
    im=Image.open(filename)
    image_list.append(im)

python - Find out the percentage of missing values in each column in the given dataset - Stack Overflow

percent_missing = df.isnull().sum() * 100 / len(df)
missing_value_df = pd.DataFrame({'column_name': df.columns,
                                 'percent_missing': percent_missing})

#python #python #loops #whileloop

Print the name of 7 days in a week - by using while loop

days = 0
week = [‘Monday’, ‘Tuesday’, ‘Wednesday’, ‘Thursday’, ‘Friday’, ‘Saturday’, 3.‘Sunday’]
while day < 7:
print(“Today is” + week[days])
days += 1

Getting the index of an item in a list containing it in Python

>>> ["foo", "bar", "baz"].index("bar")
1

#javascript #python #search #historicalcode #google #algorithms

Google’s PageRank Algorithm from 1996 - the origin of internet search

import numpy as np

def pagerank(M, num_iterations=100, d=0.85):
    N = M.shape[1]
    v = np.random.rand(N, 1)
    v = v / np.linalg.norm(v, 1)
    iteration = 0
    while iteration < num_iterations:
        iteration += 1
        v = d * np.matmul(M, v) + (1 - d) / N
    return v

#python #python #strings #vowels #function

Get vowels in strings

This method gets vowels (‘a’, ‘e’, ‘i’, ‘o’, ‘u’) found in a string.
   
#make a function:
def get_vowels(string):

#return is the keyword which means function have to return value: 
 return [each for each in string if each in 'aeiou']


#assign the words and function will return vowels words.
get_vowels('foobar') # ['o', 'o', 'a']


get_vowels('gym') # []

Could not build wheels for tokenizers which use PEP 517 and cannot be installed directly

https://github.com/pydata/bottleneck/issues/281

How To Bypass Cloudflare Bot Protection In Selenium - CodingTutz

options = webdriver.ChromeOptions()
options.add_experimental_option("excludeSwitches", ["enable-automation"])
options.add_experimental_option('useAutomationExtension', False)
options.add_argument("--disable-blink-features=AutomationControlled")
driver = webdriver.Chrome(options=options)

Python Loop through Excel sheets, place into one df - Stack Overflow

import pandas as pd

sheets_dict = pd.read_excel('Book1.xlsx', sheetname=None)

full_table = pd.DataFrame()
for name, sheet in sheets_dict.items():
    sheet['sheet'] = name
    sheet = sheet.rename(columns=lambda x: x.split('\n')[-1])
    full_table = full_table.append(sheet)

full_table.reset_index(inplace=True, drop=True)

print full_table

#python #dates #functions #python3.8

How to parse a String into Datetime in Python

from datetime import datetime

datetime_object = datetime.strptime('Jun 1 2005  1:33PM', '%b %d %Y %I:%M%p')

python - Way to change Google Chrome user agent in Selenium? - Stack Overflow

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from fake_useragent import UserAgent

options = Options()
ua = UserAgent()
userAgent = ua.random
print(userAgent)
options.add_argument(f'user-agent={userAgent}')
driver = webdriver.Chrome(chrome_options=options, executable_path=r'C:\WebDrivers\ChromeDriver\chromedriver_win32\chromedriver.exe')
driver.get("https://www.google.co.in")
driver.quit()

python - How to see the progress bar of read_csv - Stack Overflow

def read_csv_pgbar(csv_path, chunksize, usecols, dtype=object):


    # print('Getting row count of csv file')

    rows = sum(1 for _ in open(csv_path, 'r')) - 1 # minus the header
    # chunks = rows//chunksize + 1
    # print('Reading csv file')
    chunk_list = []

    with tqdm(total=rows, desc='Rows read: ') as bar:
        for chunk in pd.read_csv(csv_path, chunksize=chunksize, usecols=usecols, dtype=dtype):
            chunk_list.append(chunk)
            bar.update(len(chunk))

    df = pd.concat((f for f in chunk_list), axis=0)
    print('Finish reading csv file')

    return df

#python #python #lists #dictionary

Convert two lists into a dictionary

keys, values)) # {'a': 2, 'c': 4, 'b': 3}
 
 
#make a function: def is the keyword for the function:
def to_dictionary(keys, values):
 
 
#return is the keyword that tells program that function has to return value   
return dict(zip(keys, values))
 
  
 
# keys and values are the lists:
 
keys = ["a", "b", "c"]   
 
values = [2, 3, 4]

#python #interesting #arrays #sorting #interviewquestions

Sorting an array without changing position of negative numbers

# Python3 implementation of the approach 

# Function to sort the array such that 
# negative values do not get affected 
def sortArray(a, n): 

	# Store all non-negative values 
	ans=[] 
	for i in range(n): 
		if (a[i] >= 0): 
			ans.append(a[i]) 

	# Sort non-negative values 
	ans = sorted(ans) 

	j = 0
	for i in range(n): 

		# If current element is non-negative then 
		# update it such that all the 
		# non-negative values are sorted 
		if (a[i] >= 0): 
			a[i] = ans[j] 
			j += 1

	# Print the sorted array 
	for i in range(n): 
		print(a[i],end = " ") 


# Driver code 

arr = [2, -6, -3, 8, 4, 1] 

n = len(arr) 

sortArray(arr, n)

#python ##python #strings #comments

Create simple string along with variables

#assign a value to a variable:
types_of_people = 10 
# make a string using variable name:
X = f “there are {types_of_people} types of people.”

Output:
There are 10 types of people

Browse more snippets >>