You can easily add two numbers in Python using the following code:
```python
# Define the two numbers
first_number = 3
second_number = 5
# Calculate the sum
sum_result = first_number + second_number
# Print the result
print("The sum of", first_number, "and", second_number, "is:", sum_result)
```
When you run this code, it will output:
```
The sum of 3 and 5 is: 8
```


