PythonSTB
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pypi312

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-================================================================================
-  PYWAVELETS - USER GUIDE (Android Python STB) - Generated by RIMI
-================================================================================
-PyWavelets 1.10.0 for Android (CPython 3.12, API 24)
-----------------------------------------------------
-PyWavelets (import name: pywt) is a wavelet transform library for Python:
-discrete and stationary wavelet transforms (1D, 2D, nD), wavelet packets,
-continuous wavelet transform (CWT), thresholding, and multilevel analysis.
-Provided wheels (C extensions, cross-compiled with NDK r26):
-  pywavelets-1.10.0-cp312-cp312-android_24_arm64_v8a.whl  (real ARM64 phones)
-  pywavelets-1.10.0-cp312-cp312-android_24_x86_64.whl     (x86_64 emulators)
-Installation
-------------
-1. Install the numpy 2.5.2 Android wheel FIRST (from its own package
-   folder — do NOT look for numpy in the pywavelets folder):
-     numpy-2.5.2-cp312-cp312-android_24_<arch>.whl
-2. Install the matching pywavelets STANDALONE wheel:
-     pywavelets-1.10.0-cp312-cp312-android_24_<arch>.whl
-   pip resolves the `numpy<3,>=1.26.4` runtime dependency from the
-   already-installed numpy (both wheels share the same Python 3.12 ABI).
-3. Run Test_PyWavelets.py from the Scripts folder; expect ALL PASSED.
-Quick start
------------
-  import pywt
-  import numpy as np
-  x = np.arange(16, dtype=float)
-  # 1D discrete transform and perfect reconstruction
-  cA, cD = pywt.dwt(x, 'db1')
-  y = pywt.idwt(cA, cD, 'db1')
-  # Multilevel decomposition
-  coeffs = pywt.wavedec(x, 'db2', level=2)
-  y = pywt.waverec(coeffs, 'db2')
-  # Stationary (undecimated) transform
-  swt = pywt.swt(x, 'haar', level=1)
-  y = pywt.iswt(swt, 'haar')
-  # 2D transform
-  img = np.arange(64, dtype=float).reshape(8, 8)
-  cA, (cH, cV, cD) = pywt.dwt2(img, 'haar')
-  rec = pywt.idwt2((cA, (cH, cV, cD)), 'haar')
-  # Denoising-style thresholding
-  t = pywt.threshold(np.linspace(-2, 2, 32), 1.0, mode='soft')
-  print(pywt.wavelist()[:5])   # ['bior1.1', 'bior1.3', ...]
-Android-specific notes
-----------------------
-* The 4 native modules (pywt/_extensions/_cwt, _dwt, _pywt, _swt,
-  named *.cpython-312.so) link only against librimi.so + system
-  libm/libdl/libc. No C++ runtime is needed (pure C + Cython).
-* 16 KB page aligned, no GNU_RELRO: safe on Android 13+ (no dlopen
-  `can't enable GNU RELRO protection` crash).
-* No OPENBLAS/Fortran dependency — unlike numpy/scipy this wheel is
-  small (~4.3 MB) and has no native deps besides numpy's headers
-  at build time.
-* Shell `python3` on device cannot load these modules (librimi.so needs
-  the app JVM context); always test inside the app via Scripts.
-Known upstream quirk (NOT a build defect)
------------------------------------------
-The 1.10.0 source distribution ships util/version_utils.py with the
-version constants still at 1.8.0, so `pywt.__version__` reports '1.8.0'
-— the official PyPI 1.10.0 wheels do exactly the same. The *wheel*
-version (pywavelets-1.10.0.dist-info) is 1.10.0. The device test
-therefore checks only that the version string is present.
-Tested features (device script Test_PyWavelets.py, 10 checks)
---------------------------------------------------------------
-  import pywt + numpy / version string / Wavelet('db1') object /
-  wavelist contents (db1, db2, haar, sym2) / dwt+idwt roundtrip /
-  wavedec+waverec roundtrip (db2, level 2) / swt+iswt roundtrip (haar) /
-  dwt2+idwt2 roundtrip (haar, 8x8) / soft+hard threshold smoke /
-  pywt.data.camera() load.
-Runtime dependency
-------------------
-  numpy<3,>=1.26.4 (declared in METADATA Requires-Dist; install the
-  numpy 2.5.2 Android wheel from its own package folder separately).
-================================================================================
-  Generated by RIMI
-================================================================================