Mar-03-2021, 09:47 AM
Mar-03-2021, 12:34 PM
Do you talk about opencv-python?
That package include all of what needed to use OpenCV.
That package include all of what needed to use OpenCV.
opencv-python Wrote:Q: Do I need to install also OpenCV separately?Location will be under
A: No, the packages are special wheel binary packages and they already contain statically built OpenCV binaries.
site-packages with a folder cv2.tom@tom-VirtualBox:~$ pip show opencv-python Name: opencv-python Version: 4.5.1.48 Summary: Wrapper package for OpenCV python bindings. Home-page: https://github.com/skvark/opencv-python Author: None Author-email: None License: MIT Location: /home/tom/.pyenv/versions/3.9.1/lib/python3.9/site-packages Requires: numpy Required-by:Usually there is no need to know location,as
import cv2 should take care of all.tom@tom-VirtualBox:~$ python Python 3.9.1 (default, Jan 25 2021, 15:34:59) [GCC 7.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import cv2 >>> >>> cv2.__version__ '4.5.1' >>> exit()
Mar-03-2021, 01:13 PM
Quote:Do you talk about opencv-python?According to the textbook I explore, I installed opencv with the following command:
pip3 install opencv-contrib-python
Quote:Location will be under site-packages with a folder cv2Well, the problem is resolved by searching for a particular file that I knew that it's located in OpenCV installation.
Indeed it was found under site-packages. And site-packages was found under .local in the "home" folder.
Quote:Usually there is no need to know location,as import cv2 should take care of all.In this particular case I need it to point to a face classifier (.xml file located in OpenCV directory) in the python code.
Thanks.
Mar-09-2021, 12:24 PM
For internal packages location is displayed at the bottom of help command, e.g.:
>>> import copy
>>> help(copy)
Help on module copy:
NAME
copy - Generic (shallow and deep) copying operations.
MODULE REFERENCE
https://docs.python.org/3.8/library/copy
The following documentation is automatically generated from the Python
source files. It may be incomplete, incorrect or include features that
are considered implementation detail and may vary between Python
implementations. When in doubt, consult the module reference at the
location listed above.
DESCRIPTION
Interface summary:
import copy
x = copy.copy(y) # make a shallow copy of y
x = copy.deepcopy(y) # make a deep copy of y
For module specific errors, copy.Error is raised.
The difference between shallow and deep copying is only relevant for
compound objects (objects that contain other objects, like lists or
class instances).
- A shallow copy constructs a new compound object and then (to the
extent possible) inserts *the same objects* into it that the
original contains.
- A deep copy constructs a new compound object and then, recursively,
inserts *copies* into it of the objects found in the original.
Two problems often exist with deep copy operations that don't exist
with shallow copy operations:
a) recursive objects (compound objects that, directly or indirectly,
contain a reference to themselves) may cause a recursive loop
b) because deep copy copies *everything* it may copy too much, e.g.
administrative data structures that should be shared even between
copies
Python's deep copy operation avoids these problems by:
a) keeping a table of objects already copied during the current
copying pass
b) letting user-defined classes override the copying operation or the
set of components copied
This version does not copy types like module, class, function, method,
nor stack trace, stack frame, nor file, socket, window, nor array, nor
any similar types.
Classes can use the same interfaces to control copying that they use
to control pickling: they can define methods called __getinitargs__(),
__getstate__() and __setstate__(). See the documentation for module
"pickle" for information on these methods.
CLASSES
builtins.Exception(builtins.BaseException)
Error
class Error(builtins.Exception)
| Common base class for all non-exit exceptions.
|
| Method resolution order:
| Error
| builtins.Exception
| builtins.BaseException
| builtins.object
|
| Data descriptors defined here:
|
| __weakref__
| list of weak references to the object (if defined)
|
| ----------------------------------------------------------------------
| Methods inherited from builtins.Exception:
|
| __init__(self, /, *args, **kwargs)
| Initialize self. See help(type(self)) for accurate signature.
|
| ----------------------------------------------------------------------
| Static methods inherited from builtins.Exception:
|
| __new__(*args, **kwargs) from builtins.type
| Create and return a new object. See help(type) for accurate signature.
|
| ----------------------------------------------------------------------
| Methods inherited from builtins.BaseException:
|
| __delattr__(self, name, /)
| Implement delattr(self, name).
|
| __getattribute__(self, name, /)
| Return getattr(self, name).
|
| __reduce__(...)
| Helper for pickle.
|
| __repr__(self, /)
| Return repr(self).
|
| __setattr__(self, name, value, /)
| Implement setattr(self, name, value).
|
| __setstate__(...)
|
| __str__(self, /)
| Return str(self).
|
| with_traceback(...)
| Exception.with_traceback(tb) --
| set self.__traceback__ to tb and return self.
|
| ----------------------------------------------------------------------
| Data descriptors inherited from builtins.BaseException:
|
| __cause__
| exception cause
|
| __context__
| exception context
|
| __dict__
|
| __suppress_context__
|
| __traceback__
|
| args
FUNCTIONS
copy(x)
Shallow copy operation on arbitrary Python objects.
See the module's __doc__ string for more info.
deepcopy(x, memo=None, _nil=[])
Deep copy operation on arbitrary Python objects.
See the module's __doc__ string for more info.
DATA
__all__ = ['Error', 'copy', 'deepcopy']
FILE
/usr/lib/python3.8/copy.py
>>> Probably with external packages it will also work ... while displaying only bottom part of help text (help for cv2 contains several thousands of lines) ?