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docs: add license rationale, Python/PineScript guides, API updates

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- Add docs/license.md with Apache 2.0 rationale and patent protection analysis
- Add docs/python.md and docs/pinescript.md platform guides
- Expand README license section with disclosure and link to rationale
- Update docs/api.md and docs/architecture.md
- Update Python bindings: helpers, all indicator modules, pyproject.toml
- Add Python tests for Arrow and Polars integration
- Update TValue core type and documentation
- Add fix_length_to_period tooling script
This commit is contained in:
Miha Kralj
2026-03-03 22:11:35 -08:00
parent 6f4e083811
commit f10baa6dfb
28 changed files with 2050 additions and 542 deletions
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python/quantalib/channels.py
+8 -8
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@@ -315,15 +315,15 @@ def vwapsd(price: object, volume: object, numDevs: float = 2.0, offset: int = 0,
return _wrap_multi({"upper": upper, "lower": lower, "vwap": vwap, "stdDev": stdDev}, idx, "channels", offset)
def bbands(close: object, length: int = 20, std: float = 2.0,
def bbands(close: object, period: int = 20, std: float = 2.0,
offset: int = 0, **kwargs) -> object:
"""Bollinger Bands -> (upper, mid, lower) or DataFrame."""
length = int(length); std = float(std); offset = int(offset)
period = int(kwargs.get("length", period)); std = float(std); offset = int(offset)
src, idx = _arr(close); n = len(src)
upper = _out(n); mid = _out(n); lower = _out(n)
_check(_lib.qtl_bbands(_ptr(src), n, _ptr(upper), _ptr(mid), _ptr(lower), length, std))
_check(_lib.qtl_bbands(_ptr(src), n, _ptr(upper), _ptr(mid), _ptr(lower), period, std))
return _wrap_multi(
{f"BBU_{length}_{std}": upper, f"BBM_{length}_{std}": mid, f"BBL_{length}_{std}": lower},
{f"BBU_{period}_{std}": upper, f"BBM_{period}_{std}": mid, f"BBL_{period}_{std}": lower},
idx, "channels", offset)
@@ -341,12 +341,12 @@ def atrbands(high: object, low: object, close: object,
idx, "channels", offset)
def apchannel(high: object, low: object, length: int = 20,
def apchannel(high: object, low: object, period: int = 20,
offset: int = 0, **kwargs) -> object:
"""Average Price Channel -> (upper, lower) or DataFrame."""
length = int(length); offset = int(offset)
period = int(kwargs.get("length", period)); offset = int(offset)
h, idx = _arr(high); l, _ = _arr(low)
n = len(h)
upper = _out(n); lower = _out(n)
_check(_lib.qtl_apchannel(_ptr(h), _ptr(l), n, _ptr(upper), _ptr(lower), float(length)))
return _wrap_multi({f"APCU_{length}": upper, f"APCL_{length}": lower}, idx, "channels", offset)
_check(_lib.qtl_apchannel(_ptr(h), _ptr(l), n, _ptr(upper), _ptr(lower), float(period)))
return _wrap_multi({f"APCU_{period}": upper, f"APCL_{period}": lower}, idx, "channels", offset)