Commit Graph

20 Commits

Author SHA1 Message Date
Vadim Levin
ef85b24a78 fix: wrong reference counter after module initialization 2022-01-27 12:05:06 +03:00
Vadim Levin
eca2d92791 fix: submodules creation and registration
- Add special case handling when submodule has the same name as parent
- `PyDict_SetItemString` doesn't steal reference, so reference count
  should be explicitly decremented to transfer object life-time
  ownership
- Add sanity checks for module registration input
2022-01-19 18:06:58 +03:00
Alexander Alekhin
cdfa8a668b python: use '((x,y), (w,h), angle)' in std::vector<RotatedRect> 2021-12-24 15:01:45 +00:00
Vadim Levin
16b9514543 feat: update conversion logic for std::vector<T> in Python bindings
`PyObject*` to `std::vector<T>` conversion logic:
- If user passed Numpy Array
  - If array is planar and T is a primitive type (doesn't require
    constructor call) that matches with the element type of array, then
    copy element one by one with the respect of the step between array
    elements. If compiler is lucky (or brave enough) copy loop can be
    vectorized.
    For classes that require constructor calls this path is not
    possible, because we can't begin an object lifetime without hacks.
  - Otherwise fall-back to general case
- Otherwise - execute the general case:
  If PyObject* corresponds to Sequence protocol - iterate over the
  sequence elements and invoke the appropriate `pyopencv_to` function.

`std::vector<T>` to `PyObject*` conversion logic:
- If `std::vector<T>` is empty - return empty tuple.
- If `T` has a corresponding `Mat` `DataType` than return
  Numpy array instance of the matching `dtype` e.g.
  `std::vector<cv::Rect>` is returned as `np.ndarray` of shape `Nx4` and
  `dtype=int`.
  This branch helps to optimize further evaluations in user code.
- Otherwise - execute the general case:
  Construct a tuple of length N = `std::vector::size` and insert
  elements one by one.

Unnecessary functions were removed and code was rearranged to allow
compiler select the appropriate conversion function specialization.
2021-09-01 13:00:21 +03:00
Vadim Levin
531ea5b3a2 fix: convert arguments names that are keywords reserved by Python 2021-08-01 12:02:36 +03:00
Pavel Rojtberg
6c1a433c4c python: also catch general c++ exceptions
they might be thrown from third-party code (notably Ogre in the ovis
module).
While Linux is kind enough to print them, they cause instant termination
on Windows.
Arguably, they do not origin from OpenCV itself, but still this helps
understanding what went wrong when calling an OpenCV function.
2021-02-02 21:16:01 +01:00
Vadim Levin
1d3207d7c7 feat: common fixed size sequence conversion for Python bindings 2021-01-25 08:08:38 +03:00
Vadim Levin
a0bdb78a99 feat: add overload resolution exception for Python bindings 2021-01-18 16:29:17 +03:00
Vadim Levin
7b0d7d0c9a fix: conversion to string in python bindings
If provided `PyObject` can't be converted to string `TypeError` is
 reported instead of `SytemError` without any message.
2020-12-16 15:11:58 +03:00
Alexander Alekhin
442999dcdb core: fix handling of ND-arrays in dumpInputArray() helpers 2020-06-12 10:23:32 +00:00
Vadim Levin
31289d2f32 Merge pull request #15915 from VadimLevin:dev/norm_fix
Fix implicit conversion from array to scalar in python bindings

* Fix wrong conversion behavior for primitive types

  - Introduce ArgTypeInfo namedtuple instead of plain tuple.
    If strict conversion parameter for type is set to true, it is
    handled like object argument in PyArg_ParseTupleAndKeywords and
    converted to concrete type with the appropriate pyopencv_to function
    call.
  - Remove deadcode and unused variables.
  - Fix implicit conversion from numpy array with 1 element to scalar
  - Fix narrowing conversion to size_t type.

* Fix wrong conversion behavior for primitive types

  - Introduce ArgTypeInfo namedtuple instead of plain tuple.
    If strict conversion parameter for type is set to true, it is
    handled like object argument in PyArg_ParseTupleAndKeywords and
    converted to concrete type with the appropriate pyopencv_to function
    call.
  - Remove deadcode and unused variables.
  - Fix implicit conversion from numpy array with 1 element to scalar
  - Fix narrowing conversion to size_t type.·
  - Enable tests with wrong conversion behavior
  - Restrict passing None as value
  - Restrict bool to integer/floating types conversion

* Add PyIntType support for Python 2

* Remove possible narrowing conversion of size_t

* Bindings conversion update

  - Remove unused macro
  - Add better conversion for types to numpy types descriptors
  - Add argument name to fail messages
  - NoneType treated as a valid argument. Better handling will be added
    as a standalone patch

* Add descriptor specialization for size_t

* Add check for signed to unsigned integer conversion safety

  - If signed integer is positive it can be safely converted
    to unsigned
  - Add check for plain python 2 objects
  - Add check for numpy scalars
  - Add simple type_traits implementation for better code style

* Resolve type "overflow" false negative in safe casting check

 - Move type_traits to separate header

* Add copyright message to type_traits.hpp

* Limit conversion scope for integral numpy types

  - Made canBeSafelyCasted specialized only for size_t, so
    type_traits header became unused and was removed.
  - Added clarification about descriptor pointer
2020-01-13 18:11:34 +03:00
Vadim Levin
8d74101f07 Merge pull request #15955 from VadimLevin:dev/vlevin/generator_tests
Tests for argument conversion of Python bindings generator

* Tests for parsing elemental types from Python bindings

  - Add positive and negative tests for int, float, double, size_t,
    const char*, bool.
  - Tests with wrong conversion behavior are skipped.

* Move implicit conversion of bool to integer/floating types to wrong
conversion behavior.
2019-11-29 16:24:13 +03:00
Alexander Alekhin
0e40c8a031 fix pylint warnings
pylint 1.8.3
2019-10-16 18:49:33 +03:00
Alexander Alekhin
2fa9bd221d core: add utils::findDataFile() / samples::findFile() 2018-11-16 00:25:06 +00:00
Alexander Alekhin
95dd4b3f27 bindings: add debug helpers for args conversions 2018-09-08 12:23:08 +00:00
Alexander Alekhin
dcb9bc2544 python: eliminate pylint warnings
Tested with:
- pylint 1.9.1
2018-06-04 17:58:06 +03:00
Dan Mašek
8c1d8eccdd Merge pull request #11207 from dan-masek:add_redirect_error
* Add Python support for error message handlers.

* Move the static variable to the only function that uses it.

* Remove the optional param (user data), since this can already be handled by closures.

* Correct the help string.

* python: added redirectError test
2018-04-03 21:16:34 +03:00
Alexander Alekhin
5560db73bf python: 'cv2.' -> 'cv.' via 'import cv2 as cv' 2017-12-11 13:46:55 +03:00
Alexander Alekhin
7791839f22 python(test): tests filtering 2017-09-03 18:26:24 +00:00
Alexander Alekhin
2f94637899 python(test): refactor test.py, move test code outside from test.py 2017-09-03 18:26:09 +00:00