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Kostrov Vlad #1

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123 changes: 32 additions & 91 deletions caesarCipher.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -34,13 +34,11 @@
"\n",
"Here is an algorithm to follow:\n",
"\n",
"- outside of the calling function\n",
" - Ask the user to enter the plaintext\n",
" - Ask the user to enter the key\n",
"\n",
"- BEGIN caesarCipher with the **plaintext** and **key**\n",
"-BEGIN\n",
"- intialise a ciphertext string to the empty string\n",
"- Ask the user to enter the plaintext\n",
"- change plaintext into all CAPS\n",
"- Ask the user to enter the key\n",
"- For every letter in the plaintext\n",
"- if the letter is alphabetic\n",
" - convert the letter into a number (alphabet number A=0, B=1... Z=25 or ASCII number A=65 B=66...Z=90 )\n",
Expand All @@ -49,7 +47,6 @@
" - convert the number back into a character\n",
"- add the character to the cipherttext\n",
"- are there more letters in the plaintext? \n",
"- return the ciphertext to the calling program\n",
"- END\n"
]
},
Expand Down Expand Up @@ -102,20 +99,20 @@
},
{
"cell_type": "code",
"execution_count": 1,
"execution_count": 8,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"65,66,67,32,88,89,90,"
"84,72,73,83,32,73,83,32,65,32,83,84,82,73,78,71,32,65,76,76,32,73,78,32,85,80,80,69,82,67,65,83,69,"
]
}
],
"source": [
"# changing a character into ascii values:\n",
"myString = \"abc xyz\".upper()\n",
"myString = \"this is a string all in uppercase\".upper()\n",
"for i in range(len(myString)):\n",
" asciiNum = ord (myString[i])\n",
" print(asciiNum, end= \",\")"
Expand Down Expand Up @@ -173,131 +170,75 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"## Caeser Cipher\n"
"## Caser Cipher\n"
]
},
{
"cell_type": "code",
"execution_count": 4,
"execution_count": 36,
"metadata": {},
"outputs": [],
"source": [
"#function that will create ciphertext from plaintext and a key\n",
"import string\n",
"def caesarCipher(plaintext, key):\n",
" key=int(key)\n",
" alpha = string.ascii_uppercase\n",
" ciphertext = \"\"\n",
" \n",
" message = plaintext.upper()\n",
" newMessage = \"\"\n",
" for i in range(0,len(message)):\n",
" if message[i] in alpha: # use the in operator\n",
" newMessage += message[i]\n",
" asciiNum =int(ord (newMessage[i]))+key\n",
" if asciiNum>90:\n",
" asciiNum-=26\n",
" ciphertext+=chr(asciiNum)\n",
" elif message[i] not in alpha:\n",
" newMessage += message[i]\n",
" #implement caesar cipher here\n",
" \n",
" \n",
" return ciphertext\n",
"\n",
" "
"\n",
" return ciphertext\n"
]
},
{
"cell_type": "code",
"execution_count": 5,
"execution_count": 37,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"your encrypted message = \n"
"your encrypted message = €tuumqo~q€ym…",
"ym…",
"\n"
]
}
],
"source": [
"#test your caeserCipher function here\n",
"secret = caesarCipher(\"this is a secret\", 9) # this should return : CQRB RB J BNLANC\n",
"secret = caesarCipher(\"this is a secret maymay \", 70) # this should return : CQRB RB J BNLANC\n",
"print(\"your encrypted message = \", secret)"
]
},
{
"cell_type": "code",
"execution_count": 6,
"execution_count": 32,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"your encrypted message = \n"
"your encrypted message = CQRBRBJBNLANC\n"
]
}
],
"source": [
"secret = caesarCipher(\"this is a secret\", 22) # should return PDEO EO W OAYNAP\n",
"secret = caesarCipher(\"this is a secret\", 9) # should return PDEO EO W OAYNAP\n",
"print(\"your encrypted message = \", secret)"
]
},
{
"cell_type": "code",
"execution_count": 7,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"please enter your message to encodehello world\n",
"please enter the key - between 1 and 25100\n",
"that was not a valid key range, please try again\n",
"please enter the key - between 1 and 25r\n",
"you did not enter a number, the key must be a number, try again\n",
"please enter the key - between 1 and 2512\n",
"that was not a valid key range, please try again\n",
"please enter the key - between 1 and 2512\n",
"that was not a valid key range, please try again\n",
"please enter the key - between 1 and 25\n",
"you did not enter a number, the key must be a number, try again\n",
"please enter the key - between 1 and 25\n",
"you did not enter a number, the key must be a number, try again\n"
]
},
{
"ename": "KeyboardInterrupt",
"evalue": "",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mKeyboardInterrupt\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m/usr/local/lib/python3.5/dist-packages/ipykernel/kernelbase.py\u001b[0m in \u001b[0;36m_input_request\u001b[0;34m(self, prompt, ident, parent, password)\u001b[0m\n\u001b[1;32m 729\u001b[0m \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 730\u001b[0;31m \u001b[0mident\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mreply\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0msession\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mrecv\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mstdin_socket\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;36m0\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 731\u001b[0m \u001b[0;32mexcept\u001b[0m \u001b[0mException\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
"\u001b[0;32m/usr/local/lib/python3.5/dist-packages/jupyter_client/session.py\u001b[0m in \u001b[0;36mrecv\u001b[0;34m(self, socket, mode, content, copy)\u001b[0m\n\u001b[1;32m 795\u001b[0m \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 796\u001b[0;31m \u001b[0mmsg_list\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0msocket\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mrecv_multipart\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mmode\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mcopy\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mcopy\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 797\u001b[0m \u001b[0;32mexcept\u001b[0m \u001b[0mzmq\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mZMQError\u001b[0m \u001b[0;32mas\u001b[0m \u001b[0me\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
"\u001b[0;32m/usr/local/lib/python3.5/dist-packages/zmq/sugar/socket.py\u001b[0m in \u001b[0;36mrecv_multipart\u001b[0;34m(self, flags, copy, track)\u001b[0m\n\u001b[1;32m 394\u001b[0m \"\"\"\n\u001b[0;32m--> 395\u001b[0;31m \u001b[0mparts\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m[\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mrecv\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mflags\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mcopy\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mcopy\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtrack\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mtrack\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 396\u001b[0m \u001b[0;31m# have first part already, only loop while more to receive\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
"\u001b[0;32mzmq/backend/cython/socket.pyx\u001b[0m in \u001b[0;36mzmq.backend.cython.socket.Socket.recv (zmq/backend/cython/socket.c:7683)\u001b[0;34m()\u001b[0m\n",
"\u001b[0;32mzmq/backend/cython/socket.pyx\u001b[0m in \u001b[0;36mzmq.backend.cython.socket.Socket.recv (zmq/backend/cython/socket.c:7460)\u001b[0;34m()\u001b[0m\n",
"\u001b[0;32mzmq/backend/cython/socket.pyx\u001b[0m in \u001b[0;36mzmq.backend.cython.socket._recv_copy (zmq/backend/cython/socket.c:2344)\u001b[0;34m()\u001b[0m\n",
"\u001b[0;32m/usr/local/lib/python3.5/dist-packages/zmq/backend/cython/checkrc.pxd\u001b[0m in \u001b[0;36mzmq.backend.cython.checkrc._check_rc (zmq/backend/cython/socket.c:9621)\u001b[0;34m()\u001b[0m\n",
"\u001b[0;31mKeyboardInterrupt\u001b[0m: ",
"\nDuring handling of the above exception, another exception occurred:\n",
"\u001b[0;31mKeyboardInterrupt\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-7-f8bf7913f29c>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[1;32m 5\u001b[0m \u001b[0;32mwhile\u001b[0m \u001b[0;32mnot\u001b[0m \u001b[0mvalid\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 6\u001b[0m \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 7\u001b[0;31m \u001b[0mkey\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0minput\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"please enter the key - between 1 and 25\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 8\u001b[0m \u001b[0;32mif\u001b[0m \u001b[0mkey\u001b[0m \u001b[0;32mnot\u001b[0m \u001b[0;32min\u001b[0m \u001b[0;34m[\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m25\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 9\u001b[0m \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"that was not a valid key range, please try again\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
"\u001b[0;32m/usr/local/lib/python3.5/dist-packages/ipykernel/kernelbase.py\u001b[0m in \u001b[0;36mraw_input\u001b[0;34m(self, prompt)\u001b[0m\n\u001b[1;32m 703\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_parent_ident\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 704\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_parent_header\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 705\u001b[0;31m \u001b[0mpassword\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;32mFalse\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 706\u001b[0m )\n\u001b[1;32m 707\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
"\u001b[0;32m/usr/local/lib/python3.5/dist-packages/ipykernel/kernelbase.py\u001b[0m in \u001b[0;36m_input_request\u001b[0;34m(self, prompt, ident, parent, password)\u001b[0m\n\u001b[1;32m 733\u001b[0m \u001b[0;32mexcept\u001b[0m \u001b[0mKeyboardInterrupt\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 734\u001b[0m \u001b[0;31m# re-raise KeyboardInterrupt, to truncate traceback\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 735\u001b[0;31m \u001b[0;32mraise\u001b[0m \u001b[0mKeyboardInterrupt\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 736\u001b[0m \u001b[0;32melse\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 737\u001b[0m \u001b[0;32mbreak\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
"\u001b[0;31mKeyboardInterrupt\u001b[0m: "
]
}
],
"source": [
"# now test the function with user input (think about your test cases!!)\n",
"plaintext = input(\"please enter your message to encode\")\n",
"valid = False # assume the user does not enter a validkey - validate!!\n",
"#validate that the key is 1) a number and 2) within the valid range 1-25\n",
"while not valid:\n",
" try:\n",
" key = int(input(\"please enter the key - between 1 and 25\"))\n",
" if key not in range(1,25]:\n",
" print(\"that was not a valid key range, please try again\")\n",
" else:\n",
" valid=True\n",
" except ValueError:\n",
" print(\"you did not enter a number, the key must be a number, try again\")\n",
"\n",
"ciphertext = caesarCipher(plaintext, key)\n",
"print(\"your encoded message is:\", ciphertext)\n",
" "
]
}
],
"metadata": {
Expand Down