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Assignment 3 crack the code

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When people, media and politics get into a war of opinions, it turns into a case that divided India. Preparing to be the Indian Army's first female test case in a combat role, Captain Shikha Sharma will do anything to fit into the male-dominated academy. Miltary lawyer,Major Monica Mehra,is roped in to solve, what seems like an open and shut case, of the death of an army officer, killed by militants in an encounter. The truth is far from what it appears to be.

Will she crack the code? Marvellous performance by Jennifer winget. At my point of view she deserve bollywood, i mean hindi movies. One of the most talented actress of Indian Television.It's a rare kid that doesn't love a good spy game. Here's a way to have fun with mysterious codes while mastering an ordinary, necessary skill: first grade spelling.

This game requires only a few simple materials, and can be done at home, in the car, or even in a doctor's waiting room. Underneath the A, ask your child to write the number 1. The number 2 goes under the B, and so on. Give your child the first index card and show her how she can change the numbers into letters using the code.

This is done by looking at the first number of the coded word and finding its corresponding letter. For each word, ask your child to write the letter underneath the number on the index card and then move on to the next number. Continue until the whole word has been changed into letters. Continue with the next spelling word. Once your child has deciphered all her words, and practiced spelling them, give your child a new spy challenge!

Ask her to use the code to write a sentence for you and see if you can decode it. For example, if they wrote:. And don't be surprised if this becomes a favorite way to practice those spelling lists!

Crack the Code: Breaking a Caesar Cipher

Bookmark this to easily find it later. Then send your curated collection to your children, or put together your own custom lesson plan. Please note: Use the Contact Us link at the bottom of our website for account-specific questions or issues. My Education. Log in with different email For more assistance contact customer service. Preschool Kindergarten 1st 2nd 3rd 4th 5th. Entire library. First Grade. Crack the Code! Share this activity.

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Python doesn't have variable declarations, so it has to figure out the scope of variables itself. It does so by a simple rule: If there is an assignment to a variable inside a function, that variable is considered local. Trying to execute this line, though, will try to read the value of the local variable counter before it is assigned, resulting in an UnboundLocalError. If counter is a global variable, the global keyword will help. If increment is a local function and counter a local variable, you can use nonlocal in Python 3.

You need to use the global statement so that you are modifying the global variable counter, instead of a local variable:. If the enclosing scope that counter is defined in is not the global scope, on Python 3. In the same situation on Python 2. In Python 3. The reason of why your code throws an UnboundLocalError is already well explained in other answers. But it seems to me that you're trying to build something that works like itertools. Python has lexical scoping by default, which means that although an enclosed scope can access values in its enclosing scope, it cannot modify them unless they're declared global with the global keyword.

A closure binds values in the enclosing environment to names in the local environment. The local environment can then use the bound value, and even reassign that name to something else, but it can't modify the binding in the enclosing environment. In your case you are trying to treat counter as a local variable rather than a bound value.

Note that this code, which binds the value of x assigned in the enclosing environment, works fine:. Note that you only need to use global when you are modifying the variable; you could read counter from within increment without the need for the global statement. See this: Using global variables in a function. Learn more. Asked 8 years, 2 months ago. Active 1 month ago. Viewed k times. What am I doing wrong here? Randomblue Randomblue This question and the one it's currently marked duplicate of are under discussion in the Python chatroom.

Many of the answers here say to use globaland although that works, using modifiable globals is generally not recommend when other options exist.

ZeroPiraeus A question asked in can't be a duplicate of a question asked in UnboundLocalError can also occur for fully local variables but they're a different issue with a different solution. Active Oldest Votes. Honest Abe 6, 4 4 gold badges 39 39 silver badges 56 56 bronze badges.It is too easy to create or access your own library, just enter your email and make your search easy.

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assignment 3 crack the code

Roman History Statistics Supply Chain Tax Webpage Design Order Now.Join our email newsletter to receive free updates! There are a number of different ways of making codes. The children seem to enjoy doing this kind of activity, and when they understand the idea, they can make up their own codes, and they can also make up new ways of making codes.

Larger versions of the following tables can be found below. These can be printed and photocopied for the children to refer to. The above two tables are quite similar. The table is a grid showing the numbers from 1 toalthough some of the numbers have been replaced by letters.

The children should look at the first number in the code, find where it should be in the grid, and write down the letter that is in its space. Repeating this process should enable the children to work out the code.

All of these codes can be used as a Maths activity. For example, the message for the table above can be replaced by The children should therefore work out the answer to each of the sums e. A fun guessing game, in which children have to identify their location as represented by a picture of a place which is hidden from their view! Download our today! Search for Ideas and Resources. Videos Use these videos as the starting point for learning in your classroom!

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Crack the Code!

Share Have you made a great resource? Share it here! Subscribe Stay up to date and receive our free email newsletter! Events News. Crack the Code! By: Mark Warner. Your name. More information about text formats. Web page addresses and e-mail addresses turn into links automatically. Lines and paragraphs break automatically. Rating Select rating Give Crack the Code! You may also like:. Secret Code Sheet Get your children to create their own secret codes and messages using this handy worksheet!Have you ever wanted to send a secret message to a friend?

What if someone, like a parent or a teacher, intercepts the message and reads it? In order to make sure that only your friend could read the message, even if it was intercepted, first you would need to encrypt it. Encryption is the process of encoding a message so only the intended recipient can read it.

assignment 3 crack the code

Encryption is used to protect many of our daily online activities, like emails and credit card transactions, from unauthorized access. Modern encryption algorithms are very complicated and ideally difficult to break.

However, encryption has been around for thousands of years—long before computers existed. Leaders throughout history have used various types of encryption to send messages to allied countries and military leaders during wartime. One famous example is the Caesar cipherused by Julius Caesar in ancient Rome. The Caesar cipher is an example of a substitution cipherwhere each letter of the alphabet in English, 26 letters is replaced by another letter of the alphabet.

This is done by "shifting" the entire alphabet by a certain number of spaces. This number is called the key. For example, here is a shift of 3 note how the alphabet "wraps around" from the end :. To encode a message, each letter in the original message called the plaintext is replaced with the letter directly below it in the shifted alphabet A becomes D, B becomes E, and so on. The result is called the ciphertext. Here is a plaintext message encrypted using a shift of In order to share secret messages, you and your friend need to agree on a key in advance.

Then, you can use the key to encrypt messages, and your friend can use the same key shifting the alphabet in the opposite direction to decrypt them. Anyone who intercepts the messages will be unable to read them if they do not know the key.

But, what if a very determined person wants to crack your code? How could they do it? One major weakness of the Caesar cipher is that it is vulnerable to a brute-force attackan attack that tries all possible keys to decrypt a message.

Since there are only 25 possible keys in English using a key of 26 gets you back to the original alphabetfor very short encrypted messages it would not take you long to manually try all the keys. For example, here is a short encrypted message note that this simple version of the Caesar cipher only changes letters; punctuation remains unchanged.

What happens if we try to decrypt this message using a shift of 1? That would mean that during encryption, A became B, B became C, and so on. To decrypt the message, we work backwards B becomes, A, C becomes B, and so on. If we try this on the entire message, we get this result:.

assignment 3 crack the code

The message is still gibberish, so we know that 1 is not the key assuming the original message was actually in English! Can you try to decrypt the message using the other 24 possible keys? Keep trying different keys until you get a sentence that makes sense in English.

How long does it take you to do it by hand? Another method that can be used to crack a Caesar cipher or any other type of substitution cipher is frequency analysis.This assignment will give you practice with arrays, graphical user interfaces GUIsmain methods, reading from files and consoles, as well as the concepts from the first and second assignment.

You will also develop a test suite. Read this handout carefully so that you understand exactly what we are asking for.

Lesson 5: Simple Encryption

Do this before you start programming! Take notes as you read. What classes do we want? What are the method names? If you notice parts that are unclear, please ask the Instructor or post a message on the discussion board. Introduction: Playing the game If you are not already familiar with how to play Hangman, please see the following Wikipedia entry. The major differences between this description and the game you will design are as follows: Your game will be for one player only.

A word will be chosen randomly from a large dictionary of words, and you will have to guess it. But there will be no competition between you and another player, and you will not have to take turns playing. The player can only win by completing the word letter by letter. The player will not have the ability to complete the whole word at once. There will be no diagram of a "hanging man". However, you will still need to keep track of the number of incorrect guesses a player makes, and display to the player how many more incorrect guesses they can make before they lose.

In this assignment, we ask you to make your own graphical Hangman game that you can play with on your own. See the following set of slides for a demonstration of what your game should look like and how it should be played. There are certain basic requirements that we will expect in your final design: sufficient testing, documentation of your code, and a good design approach to the assignment.

The product of this assignment is visual, but this doesn't mean that the testing portion of the assignment can be left out. On the contrary, most of the underlying logic of this assignment can be thoroughly tested with JUnit.

When testing, you do not have to worry about testing for malicious input e. Also, make sure to cover both typical and boundary conditions in your tests, just like in the previous Assignment. In order for your game to be as user-friendly as possible, you will need to consider various error conditions see belowbut they are specified explicitly.


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