Fixes the Linux Python wheel build that broke the `0.9.3` release (and would have broken `0.9.4`), and adds a CI guard so it cannot regress silently. ### Root cause The `live-binance` data layer links `native-tls` -> `openssl-sys`, which needs OpenSSL at build time. Neither wheel container provides it: - **manylinux** ships no OpenSSL headers, and - **musllinux** cross-compiles against a musl sysroot that has no OpenSSL at all, so installing a host package (`yum`/`apk`) cannot reach the cross target. The 3-OS Python CI jobs build natively on the runner, which already has system OpenSSL, so CI stayed green while the release container build failed. ### Fix - New opt-in **`vendored-tls`** feature on `wickra-data` and the Python binding: enables `native-tls/vendored`, compiling OpenSSL from source and linking it statically. No system OpenSSL needed on either libc. No-op on macOS/Windows (Security.framework / SChannel — `openssl-sys` is never in the graph there). - `release.yml` builds the Linux wheels with `--features vendored-tls` (replaces the manylinux-only `before-script-linux` header install, which could not fix the musllinux cross build). - CI gains a **`manylinux` + `musllinux` container build-smoke** matrix job, so both container builds run on every PR. This PR's own CI is the proof the fix works before any release re-attempt. ### Notes - No version bump: `0.9.4` published nowhere (the release run was cancelled before any publish job ran), so this lands on `0.9.4` and the tag is re-pointed at the fixed commit. - Adds checks to `ci.yml` (the smoke job is now a 2-entry matrix).
Wickra — Python
Streaming-first technical indicators for Python. pip install wickra — zero
third-party dependencies (not even NumPy), no system dependencies, no C build tooling.
Wickra is a multi-language technical-analysis library with a Rust core and bindings for Python, Node.js and WASM, plus a C ABI for C, C++, C#, Go, Java, R and any other C-capable language. Every indicator is an O(1) streaming state machine, so live trading bots and historical backtests share the exact same implementation. This package is the Python binding (PyO3); it exposes all 514 streaming-first indicators across twenty-four families.
Install
pip install wickra
Pre-built wheels ship for Linux, macOS, and Windows — there is nothing to
compile and no C library to track down. pip install wickra pulls zero
third-party packages; NumPy is an optional extra (pip install wickra[numpy])
for zero-copy interop.
Quick start
import wickra as ta # zero third-party deps — not even NumPy
# Batch: classic TA-Lib-style usage over a whole series.
prices = [100.0 + i * 0.1 for i in range(1000)] # list, array.array or NumPy all work
rsi = ta.RSI(14)
values = rsi.batch(prices) # array.array('d'), NaN during warmup
# np.asarray(values) wraps it zero-copy if you use NumPy
# Streaming: the same indicator, fed tick by tick in O(1).
rsi = ta.RSI(14)
for price in live_feed:
value = rsi.update(price) # no recomputation over history
if value is not None and value > 70:
print("overbought")
batch(prices) and feeding the same prices through update() produce
identical values — the equivalence is enforced by the test suite.
Benchmark
Two benchmarks ship with the binding:
benchmarks/throughput.py— streaming and batch updates-per-second forSMA,ATRandMACD. This is per-binding FFI overhead (the same Rust core runs under every binding), not a cross-library ratio.benchmarks/compare_libraries.py— the cross-library comparison against TA-Lib, pandas-ta, tulipy and finta that backs the headline speedups.
maturin develop --release
python -m benchmarks.throughput
python -m benchmarks.compare_libraries # cross-library; auto-detects installed peers
See the repository BENCHMARKS.md.
Documentation
The full indicator catalogue, guides, quickstarts, and API reference live in the main repository and documentation site:
- Repository & full indicator list: https://github.com/wickra-lib/wickra
- Docs (quickstarts, cookbook, TA-Lib migration): https://docs.wickra.org
- Runnable examples:
examples/python/
Wickra ships native bindings for Python, Node.js, WASM and Rust, plus a
C ABI hub that any C-capable language (C, C++, C#, Go, Java, R) links against —
all exposing the same indicators from the shared, unsafe-forbidden Rust core.
Security
Found a security issue? Please don't open a public issue. Report it privately
via the affected repository's Security tab ("Report a vulnerability") or email
support@wickra.org with a subject line starting [wickra security]. Full
policy: https://github.com/wickra-lib/wickra/blob/main/SECURITY.md.
Disclaimer
Wickra is an indicator toolkit, not a trading system. The values it computes are deterministic transforms of the input data — they are not financial advice and do not predict the market. Any use in a live trading context is at your own risk. The library is provided as is, without warranty of any kind.
License
Licensed under either of Apache-2.0 or MIT at your option.