Tkinter

1. Create a program that draws the No Entry traffic sign, as shown in the image:

2. Create a program mince.py and in it a function mince. The function should generate a random position and coin value from 1 to 5. The resulting image should look similar to the given example.

Call the function mince 10 times using a loop. 3. Modify the previous program so that only coins with values 1, 2, 5, 10, 20, 50 are generated.

When generating the coin values, use the command:

            random.choice([1, 2, 5, 10, 20, 50])

4. The random.choice command can also be used to select colors. Modify the previous program so that the variable farba (color) is assigned using:

random.choice([‘silver’, ‘gold’, ‘white’])

and use this variable in the drawing command fill=farba.

5. Aliens have sent us the following message.

Try to reply with a similar message. Write a program called ufo_sprava.py that randomly generates such a message according to the following rules:

• Each message consists of 256 small ellipses.
• The ellipses are arranged in a grid with 18 columns and 12 rows.
• Each cell of the grid is 20x20 pixels.

Slovník - dictionary

Methods

Method Description

dict.keys() returns all keys

dict.values() returns all values

dict.items() returns all keys and values

dict.get(key) safe access to values

dict.pop(key) removes and returns value

1. Create a dictionary student with the following data:

            "name": "Peter"
            "age": 21
            "study_program": "Computer Science"
   

Print all keys and values.

2. Add a new key year with the value 2 to the existing dictionary student, and change age to 22.

3. For the given dictionary:

    employee = {
            "name": "Jana",
            "position": "accountant",
            "salary": 1300
    }
   

Print each key and its value in the format:

    name: Jana
    position: accountant
    salary: 1300

4. From the dictionary products = {“apple”: 0.5, “pear”: 0.7, “banana”: 0.5} remove all items with the value 0.5.

5. For the dictionary countries = {“Slovakia”: “Bratislava”, “Czech Republic”: “Prague”} create a new one where the keys become values and values become keys.

6. You have two dictionaries:

    daily_sales1 = {"apple": 3, "pear": 2}
    daily_sales2 = {"apple": 4, "banana": 5}
   

Create a single dictionary that contains all items. If keys repeat, sum their values. The output should look like this:

    {"apple": 7, "pear": 2, "banana": 5}

7. Create a function word_count_dict(sentence) that returns a dictionary where the keys are words and the values are the number of their occurrences in the sentence. Example:

    word_count_dict("dog meow dog meow meow")
   

Output:

    {'dog': 2, 'meow': 3}