The main purpose of the sip module is to provide functionality common to all SIP generated bindings. It is loaded automatically and most of the time you will completely ignore it. However, it does expose some functionality that can be used by applications.
This does the Python equivalent of casting a C++ instance to one of its sub or super-class types.
Parameters: |
|
---|---|
Returns: | a new Python object is that wraps the same C++ instance as obj, but has the type type. |
For C++ instances this calls the C++ destructor. For C structures it returns the structure’s memory to the heap.
Parameter: | obj – the Python object. |
---|
This displays various bits of useful information about the internal state of the Python object that wraps a C++ instance or C structure.
Parameter: | obj – the Python object. |
---|
New in version 4.9.
This returns the version number that has been set for an API. The version number is either set explicitly by a call to sip.setapi() or implicitly by importing the module that defines it.
Parameter: | name – the name of the API. |
---|---|
Returns: | The version number that has been set for the API. An exception will be raised if the API is unknown. |
This checks if the C++ instance or C structure has been deleted and returned to the heap.
Parameter: | obj – the Python object. |
---|---|
Returns: | True if the C/C++ instance has been deleted. |
New in version 4.12.1.
This checks if the C++ instance or C structure was created by Python. If it was then it is possible to call a C++ instance’s protected methods.
Parameter: | obj – the Python object. |
---|---|
Returns: | True if the C/C++ instance was created by Python. |
This checks if the C++ instance or C structure is owned by Python.
Parameter: | obj – the Python object. |
---|---|
Returns: | True if the C/C++ instance is owned by Python. |
New in version 4.9.
This sets the version number of an API. An exception is raised if a different version number has already been set, either explicitly by a previous call, or implicitly by importing the module that defines it.
Parameters: |
|
---|
This marks the C++ instance or C structure as having been deleted and returned to the heap so that future references to it raise an exception rather than cause a program crash. Normally SIP handles such things automatically, but there may be circumstances where this isn’t possible.
Parameter: | obj – the Python object. |
---|
If the bindings have been created with SIP’s -r command line option then the generated code will include debugging statements that trace the execution of the code. (It is particularly useful when trying to understand the operation of a C++ library’s virtual function calls.)
Parameter: | mask – the mask that determines which debugging statements are enabled. |
---|
Debugging statements are generated at the following points:
By default the trace mask is zero and all debugging statements are disabled.
This returns the address, as an integer, of a wrapped C/C++ structure or class instance.
Parameter: | obj – the Python object. |
---|---|
Returns: | an integer that is the address of the C/C++ instance. |
This is the type object for the type SIP uses to represent a C/C++ void *. It may have a size associated with the address in which case the Python buffer interface is supported. The type has the following methods.
Parameters: |
|
---|
This returns the address as an integer.
Returns: | the integer address. |
---|
New in version 4.12.
This returns the item at a given index. An exception will be raised if the address does not have an associated size. It behaves like a Python memoryview object.
Parameter: | idx – is the index which may either be an integer, an object that implements __index__() or a slice object. |
---|---|
Returns: | the item. If the index is an integer then the item will be a Python v2 string object or a Python v3 bytes object containing the single byte at that index. If the index is a slice object then the item will be a new voidptr object defining the subset of the memory corresponding to the slice. |
This returns the address as a hexadecimal string.
Returns: | the hexadecimal string address. |
---|
New in version 4.12.
This returns the size associated with the address.
Returns: | the associated size. An exception will be raised if there is none. |
---|
New in version 4.12.
This updates the memory at a given index. An exception will be raised if the address does not have an associated size or is not writable. It behaves like a Python memoryview object.
Parameters: |
|
---|
New in version 4.10.
This returns the address as an unnamed Python Capsule. This requires Python v3.1 or later or Python v2.7 or later.
Returns: | the Capsule. |
---|
This returns the address as a Python CObject. This is deprecated with Python v3.1 and is not supported with Python v3.2 and later.
Returns: | the CObject. |
---|
This returns a copy of the block of memory as a Python v2 string object or a Python v3 bytes object.
Parameter: | size – the number of bytes to copy. If it is negative then the size associated with the address is used. If there is no associated size then an exception is raised. |
---|---|
Returns: | the string or bytes object. |
This returns the size associated with the address.
Returns: | the associated size which will be negative if there is none. |
---|
This sets the size associated with the address.
Parameter: | size – the size to associate. If it is negative then no size is associated. |
---|
This returns the writeable state of the memory.
Returns: | True if the memory is writeable. |
---|
This sets the writeable state of the memory.
Parameter: | writeable – the writeable state to set. |
---|
This wraps a C structure or C++ class instance in a Python object. If the instance has already been wrapped then a new reference to the existing object is returned.
Parameters: |
|
---|---|
Returns: | the Python object that wraps the instance. |