When programming, it is advisable to use existing code as much as possible. Of course, the code must be of high quality and secure, so it is important to be careful about running code made by others on your own computer or in your own program.

In Python, however, there is fortunately a "standard library", i.e. a standard library of various modules for many different needs. The functionality of the modules is not directly available in your code, but they need to be imported separately into your program for use. And this is done with the import command.

Let's take an example, random numbers. Let's say we want to display a random number between zero and one hundred. We could perhaps build our own function that would do something like this:

Retrieve the remaining disk space of the computer in bytes.

Connect all these, add a leap, divide with a flower and multiply the remainder with a stone.

Generating random numbers is such a common need that there is a module for it in Python's standard library: 

. We can import the module into our program as follows:

If we want to see what the module offers, we can do this with the 

However, it is easier to just consult the Python documentation: 

If we want a random number between 1 and 10: we can call the 

 function. And since the function is from the 

Example of how the program should function:

Write a program that calculates a random number between 1-6 and prints it as follows: "Dice number: NUMBER"

Task 1

Dice

## What are imports?

When programming, it is advisable to use existing code as much as possible. Of course, the code must be of high quality and secure, so it is important to be careful about running code made by others on your own computer or in your own program.

In Python, however, there is fortunately a "standard library", i.e. a standard library of various modules for many different needs. The functionality of the modules is not directly available in your code, but they need to be imported separately into your program for use. And this is done with the import command.

---

## Case study: Random numbers

Let's take an example, random numbers. Let's say we want to display a random number between zero and one hundred. We could perhaps build our own function that would do something like this:

- Take the computer time in nanoseconds.
- Retrieve the remaining disk space of the computer in bytes.
- Retrieve the computer's serial number.
- Connect all these, add a leap, divide with a flower and multiply the remainder with a stone.

Generating random numbers is such a common need that there is a module for it in Python's standard library: **random**. We can import the module into our program as follows:

```python
import random
```

If we want to see what the module offers, we can do this with the **dir** command.

```python
import random
print(dir(random))
['BPF', 'LOG4', 'NV_MAGICCONST', 'RECIP_BPF', 'Random', 'SG_MAGICCONST', 'SystemRandom', 'TWOPI', '_ONE', '_Sequence', '_Set', '__all__', ' __builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', '_accumulate', '_acos', '_bisect', '_ceil', '_cos' , '_e', '_exp', '_floor', '_index', '_inst', '_isfinite', '_log', '_os', '_pi', '_random', '_repeat', '_sha512', ' _sin', '_sqrt', '_test', '_test_generator', '_urandom', '_warn', 'betavariate', 'choice', 'choices', 'expovariate', 'gammavariate', 'gauss', 'getrandbits' , 'getstate', 'lognormvariate', 'normalvariate', 'paretovariate', 'randbytes', 'randint', 'random', 'randrange', 'sample', 'seed', 'setstate', 'shuffle', ' triangular', 'uniform', 'vonmisesvariate', 'weibullvariate']
```

However, it is easier to just consult the Python documentation: [random](https://docs.python.org/3/library/random.html).

![](sanity:image-0016860e72b827560161baf410c4ae448e585939-667x75-png)

If we want a random number between 1 and 10: we can call the **randint** function. And since the function is from the **random** module, it is called like this:

```python
random.randint(1, 10)
```

The syntax is thus **<MODULE><PERIOD><FUNCTION>(<PARAMETERS>)**. So for example:

```python
print(random.randint(1, 10))
7

print(random.randint(1, 10))
2
```

---

## Exercise

Example of how the program should function:

```sh
python3 app.py

Number of eyes on the dice: 3
```

@exercise 8697af928a06


Imports and Random numbers

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Imports and Random numbers

What are imports?

Learn to hack — start here