# Structure Projects

## Simple Project:

1. One file for tiggering minimal functionality: `run.py`

```python
import constants as const
import helpers

# Triggering the entire project
# Do this by python run.py

def run():
	primes = helpers.calculate_primes(start=const.START, finish=const.FINISH)
	print(primes)
	
# Calling the run function:
if __name__ == '__main__':
	run()
```

1. Functions and other such stuff in `helpers.py`

```python
import constants as const

# Functions that are going to help calculate prime numbers
def is_prime(num):
	if num > 1:
		for n in range(2, num):
			if num % n != 0:
				continue
			else:
				return False
	return True

def calculate_primes(start, finish):
	primes = []
	for n in range(start, finish):
		if is_prime(n) and not in c.SKIP_RANGE:
			primes.append(n)
	return primes
```

1. `constants.py` are variables that do not change

```python
# Useful variables that are going to be used
START = 1
FINISH = 100
SKIP_RANGE = range(20, 50)
```

## Complex Project:

1. Folder `email` contains the email sending feature for the application
2. Folder `prime_calculation` contains the prime calculation functionality
3. `run.py` is in the main folder and is responsible for starting up the project