Menu driven program in python using dictionary

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menu driven program in python using dictionary

Alan Turing Graphical User Interface A graphical user interface GUI is a type of user interface that allows users to interact with electronic devices in a graphical way, i.

Originally interactive user interfaces to computers were not graphical, they were text oriented and usually consisted of commands, which had to be remembered. The DOS operating system from Microsoft and the Bourne shell under Linux are examples of such user-computer interfaces.Dictionary in python is a very useful data structure and at many times we see problems regarding converting a string to a dictionary.

So, let us discuss how we can tackle this problem. Method 1: Using eval If we get a string input which completely resembles a dictionary object if the string looks like dictionary as in python then we can easily convert it to dictionary using eval in Python.

Method 2: Using generator expressions in python If we get a string input does not completely resemble a dictionary object then we can use generator expressions to convert it to a dictionary. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.

menu driven program in python using dictionary

See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. Writing code in comment? Please use ide. Python3 code to convert. Converting string to dictionary. Recommended Posts: How to create a Dictionary in Python Python Ways to create a dictionary of Lists Python Create a dictionary using list with none values Python Convert string dictionary to dictionary Python - Concatenate Dictionary string values Python Converting list string to dictionary Python Convert dictionary object into string Python Converting String content to dictionary Python program to find second maximum value in Dictionary Python program to find the sum of all items in a dictionary Python Convert byteString key:value pair of dictionary to String Find the first repeated word in a string in Python using Dictionary Python Dictionary to find mirror characters in a string Python program to Swap Keys and Values in Dictionary Python program to print the dictionary in table format.

Check out this Author's contributed articles. Load Comments.In this tutorial, we will learn what a Dictionary is? How it can be used? Dictionaries are much like lists with an extra parameter called keys. The main differentiating factor between a list and a dictionary would be, that instead of the index we use keys to access the elements of a dictionary or values to access keys, works both ways. Also, unlike an index, keys can be of any data type varying from integer to string.

This makes them more flexible to use. Since we have flexibility in providing the key for each element in the dictionary, we will have to define each key explicitly. Below we have a dictionary in tabular format. For each element in the dictionary we have a key linked to it. Notice the curly braces that are used here, unlike square braces in the list. Here Key-1Key Therefore, if you want to access any element of a dictionary, you should know the key for that element.

For example, to access element of Key-3then just use. Also, in a dictionary, each element must have a unique key, since a key is used to uniquely identity each element of the dictionary, however, the reverse is not true, which means that elements can be repeated, but key must be unique. The above line of code successfully initialized an empty dictionary.

We can easily add elements to an empty dictionary after its initialization. Suppose you want to add Delhi with key India to your dictionary, then do it like.

Elements stored in a dictionary can be accessed just like lists in python, i. However, while iterating over each element, we will get the key and not the value of the element, therefore, to access the value of the element, we have to use the key just like index, For example: myDictionary[key].

Elements can be deleted using del keyword, which is similar to how its done in a list. For example, considering our website details dictionary. Suppose you want to add an extra element to your already initialized list which has elements, then, all you have to do is:. The update function is used for merging two dictionaries into one. The common values of both the lists get overwritten by the latter dictionary. For example, let's assume that there is another dictionary containing the list of the available courses on StudyTonight, along with the list used in the example above.

Suppose we want to copy all elements of courseAvail to the list identitythen we just have to do th following:. Note: In this case dictionary identity will get updated, and there would be no effect on dictionary courseAvail. Made with by Abhishek Ahlawat.

Ruby Servlet JSP. Operating System. Computer Architecture. Jenkins Maven. Apache Cordova Drools. We are Hiring! Sign in. Available on:. Dictionaries in Python In this tutorial, we will learn what a Dictionary is? Creating a Dictionary Since we have flexibility in providing the key for each element in the dictionary, we will have to define each key explicitly.

Python Code Examples. Network Programming in Python.Dictionaries are another example of a data structure. A dictionary is used to map or associate things you want to store the keys you need to get them. A dictionary in Python is just like a dictionary in the real world. Python Dictionary are defined into two elements Keys and Values. Keys will be a single element Values can be a list or list within a list, numbers, etc. Each key is separated from its value by a colon : while each element is separated by commas.

Properties of Dictionary Keys There are two important points while using dictionary keys More than one entry per key is not allowed no duplicate key is allowed The values in the dictionary can be of any type while the keys must be immutable like numbers, tuples or strings. Dictionary keys are case sensitive- Same key name but with the different case are treated as different keys in Python dictionaries. Python Dictionary Methods Copying dictionary You can also copy the entire dictionary to new dictionary.

For example, here we have copied our original dictionary to new dictionary name "Boys" and "Girls". Here in the example we will add another name "Sarah" to our existing dictionary. Suppose you don't want the name Charlie in the list, so you can delete the key element by following code. We used the code del Dict When code executed, it has deleted the Charlie from the main dictionary Dictionary items Method The items method returns a list of tuple pairs Keys, Value in the dictionary.

When code was executed, it returns a list of items keys and values from the dictionary Check if a given key already exists in a dictionary For a given list, you can also check whether our child dictionary exists in a main dictionary or not.

Here we have two sub-dictionaries "Boys" and "Girls", now we want to check whether our dictionary Boys exist in our main "Dict" or not. For that, we use the forloop method with else if method. For example, if we want to print the name of the elements of our dictionary alphabetically we have to use the forloop.

It will sort each element of dictionary accordingly. In our case, we declared "Girls" first, so it will be considered as dictionary 1 and boys as dictionary 2 When code is executed it prints out -1, It indicates that our dictionary 1 is less than dictionary 2.

Dictionary Str dict With Str method, you can make a dictionary into a printable string format. Dictionaries do not store their information in any particular order, so you may not get your information back in the same order you entered it. More than one entry per key is not allowed no duplicate key is allowed The values in the dictionary can be of any type while the keys must be immutable like numbers, tuples or strings.

menu driven program in python using dictionary

Python code editors are designed for the developers to code and debug program easily. Using theseI love computers and anything that has tech to it. I blog about coding, computer hardware, PC gaming, Linux, Virtualization and anything else I find interesting. I love listening to heavy metal, hip-hop, guitar solos and trap music.

Hope this helps! This function does not take any inputs.

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Now, we use create if statements to check the value of choice. Similar, We make use of elif statements to check other values of choice. Finally, for all other numbers other than 1,2,3,4 and 5, we simply print and error message and requests the user to enter a valid input and to try again. Feel feel to leave a comment if you have any queries or want to reach out to me. Happy Bloggin! Very helpful, but would it be possible for the user to select multiple options? I have a similar menu creator class!

And it has a unique interactive design! It lets you go though the alternatives with an arrow using the arrow keys to move up and down! You are commenting using your WordPress.

You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Home About Me Contact Me. Stay updated via RSS. Menu Option 1 2. Menu Option 2 3.

Menu Option 3 4.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again.

If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. A python script file to crack encrypted. The script is menu driven and allows the user to choose between a dictionary attack or a hash attack on the specified file.

Once the password has been found, it then decrypts the file completely Cracked. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Dictionaries in Python

Sign up. Python script file to crack encrypted. Python Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit Fetching latest commit…. Usage: python pdf-cracker. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Sep 7, Modern computer applications are user-friendly. They have a more ergonomic graphical user interface GUI thanks to high speed processors and powerful graphics hardware.

These applications can receive inputs through mouse clicks and can enable the user to choose from alternatives with the help of radio buttons, dropdown lists, and other GUI elements or widgets.

Such applications are developed using one of various graphics libraries available. A graphics library is a software toolkit having a collection of classes that define a functionality of various GUI elements. Many of them have been ported to Python in the form of importable modules. Some of them are listed below:. This module is bundled with standard distributions of Python for all platforms.

WxPython is a Python wrapper around WxWidgets, another cross-platform graphics library. GUI elements and their functionality are defined in the Tkinter module. The following code demonstrates the steps in creating a UI.

First of all, import the TKinter module. After importing, setup the application object by calling the Tk function. This will create a top-level window root having a frame with a title bar, control box with the minimize and close buttons, and a client area to hold other widgets. The geometry method defines the width, height and coordinates of the top left corner of the frame as below all values are in pixels : window. The application is now constantly waiting for any event generated on the elements in it.

The application's functionality involves executing appropriate callback functions in response to a particular type of event. We shall discuss event handling later in this tutorial. The event loop will terminate as and when the close button on the title bar is clicked.

The above code will create the following window:. All Tkinter widget classes are inherited from the Widget class. Let's add the most commonly used widgets. The button can be created using the Button class. The Button class constructor requires a reference to the main window and to the options. A label can be created in the UI in Python using the Label class. The Label constructor requires the top-level window object and options parameters. Option parameters are similar to the Button object.

Here, the label's caption will be displayed in red colour using Helvetica font of 16 point size. This widget renders a single-line text box for accepting the user input.


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