he-015

# HumanEval/15

Implement a file **`solution.py`** that completes the function below. Keep the given name and signature; your file must define it at module level.

```python


def string_sequence(n: int) -> str:
    """ Return a string containing space-delimited numbers starting from 0 upto n inclusive.
    >>> string_sequence(0)
    '0'
    >>> string_sequence(5)
    '0 1 2 3 4 5'
    """
```

<!-- imported from OpenAI HumanEval (HumanEval/15) -->

# Auto-generated from OpenAI HumanEval HumanEval/15. Do not edit by hand.
from solution import *  # noqa: F401,F403 (prompt helpers may be referenced by tests)
from solution import string_sequence as candidate

METADATA = {
    'author': 'jt',
    'dataset': 'test'
}


def check(candidate):
    assert candidate(0) == '0'
    assert candidate(3) == '0 1 2 3'
    assert candidate(10) == '0 1 2 3 4 5 6 7 8 9 10'


def test_he_015():
    check(candidate)

You are an expert programmer. Solve the task exactly as specified. Output your solution as fenced code blocks using the required file name(s) and the exact function/type signatures requested. Prefer correctness; do not include prose outside code unless asked.

```python
def string_sequence(n: int) -> str:
    return " ".join(map(str, range(n + 1)))
```

The user wants a Python function `string_sequence(n: int) -> str` that returns a string of space-delimited numbers from 0 to n inclusive.

Example:
`string_sequence(0)` -> `'0'`
`string_sequence(5)` -> `'0 1 2 3 4 5'`

This is straightforward. I can use `range(n + 1)` to generate numbers from 0 to n, convert them to strings, and join them with a space.

Implementation:
```python
def string_sequence(n: int) -> str:
    return " ".join(map(str, range(n + 1)))
```

Let's double check constraints and edge cases.
n is an integer. The problem says "starting from 0 upto n inclusive".
If n=0, range(1) -> [0], join -> "0". Correct.
If n=5, range(6) -> [0, 1, 2, 3, 4, 5], join -> "0 1 2 3 4 5". Correct.

The function signature matches exactly.
I will output the solution in `solution.py`.

One minor point: sometimes HumanEval problems have negative inputs? The docstring says "starting from 0 upto n inclusive", implying n >= 0. I'll assume n >= 0 as per examples. Even if n < 0, `range(n+1)` would be empty, returning `""`, which might be acceptable or not specified. I'll stick to the straightforward implementation.

Code:
```python
def string_sequence(n: int) -> str:
    return " ".join(map(str, range(n + 1)))
```

That's it. I'll format it properly.
No extra fluff.
Ready. 
Output matches request.
Proceeds. 
Self-Correction/Verification during thought:
Is there any trick? "space-delimited numbers starting from 0 upto n inclusive."
`" ".join(str(i) for i in range(n + 1))` is equivalent and maybe slightly more readable, but `map` is fine.
I'll use list comprehension or generator expression for clarity.
`return " ".join([str(i) for i in range(n + 1)])`
Both are fine.

Final code:
```python
def string_sequence(n: int) -> str:
    return " ".join(map(str, range(n + 1)))
```
Matches signature. Done. 
I will produce the output now. 
All steps verified. 
Output matches exactly. 
Proceeds. 
[Done]