petsc4py.PETSc.Sys#

class petsc4py.PETSc.Sys#

Bases: object

System utilities.

Methods Summary

`Print`(*args[, sep, end, comm])	Print output from the first processor of a communicator.
`getDefaultComm`()	Get the default MPI communicator used to create PETSc objects.
`getVersion`([devel, date, author])	Return PETSc version information.
`getVersionInfo`()	Return PETSc version information.
`hasExternalPackage`(package)	Return whether PETSc has support for external package.
`infoAllow`(flag[, filename, mode])	Enables or disables PETSc info messages.
`isFinalized`()	Return whether PETSc has been finalized.
`isInitialized`()	Return whether PETSc has been initialized.
`popErrorHandler`()	Remove the current error handler.
`popSignalHandler`()	Remove the current signal handler.
`pushErrorHandler`(errhandler)	Set the current error handler.
`registerCitation`(citation)	Register BibTeX citation.
`setDefaultComm`(comm)	Set the default MPI communicator used to create PETSc objects.
`sleep`([seconds])	Sleep some number of seconds.
`splitOwnership`(size[, bsize, comm])	Given a global (or local) size determines a local (or global) size.
`syncFlush`([comm])	Flush output from previous `syncPrint` calls.
`syncPrint`(*args[, sep, end, flush, comm])	Print synchronized output from several processors of a communicator.

Methods Documentation

classmethod Print(*args, sep=' ', end='\n', comm=None, **kwargs)#

Print output from the first processor of a communicator.

Collective.

Parameters:

*args (Any) – Positional arguments.
sep (str) – String inserted between values, by default a space.
end (str) – String appended after the last value, by default a newline.
comm (Comm | None) – MPI communicator, defaults to getDefaultComm.
**kwargs (Any) – Keyword arguments.

Return type:

None

See also

PetscPrintf

Source code at petsc4py/PETSc/Sys.pyx:156

classmethod getDefaultComm()#

Get the default MPI communicator used to create PETSc objects.

Not collective.

See also

setDefaultComm

Source code at petsc4py/PETSc/Sys.pyx:117

Return type:: Comm

classmethod getVersion(devel=False, date=False, author=False)#

Return PETSc version information.

Not collective.

Parameters:

devel (bool) – Additionally, return whether using an in-development version.
date (bool) – Additionally, return date information.
author (bool) – Additionally, return author information.

Returns:

major (int) – Major version number.
minor (int) – Minor version number.
micro (int) – Micro (or patch) version number.

Return type:

tuple[int, int, int]

Source code at petsc4py/PETSc/Sys.pyx:7

classmethod getVersionInfo()#

Return PETSc version information.

Not collective.

Returns:: info – Dictionary with version information.
Return type:: dict

Source code at petsc4py/PETSc/Sys.pyx:63

classmethod hasExternalPackage(package)#

Return whether PETSc has support for external package.

Not collective.

Parameters:: package (str) – The external package name.
Return type:: bool

See also

PetscHasExternalPackage

Source code at petsc4py/PETSc/Sys.pyx:455

classmethod infoAllow(flag, filename=None, mode='w')#

Enables or disables PETSc info messages.

Not collective.

Parameters:

flag (bool) – Whether to enable info messages.
filename (str | None) – Name of a file where to dump output.
mode (str) – Write mode for file, by default "w".

Return type:

None

See also

PetscInfoAllow, PetscInfoSetFile

Source code at petsc4py/PETSc/Sys.pyx:397

classmethod isFinalized()#

Return whether PETSc has been finalized.

Not collective.

See also

isInitialized

Source code at petsc4py/PETSc/Sys.pyx:102

Return type:: bool

classmethod isInitialized()#

Return whether PETSc has been initialized.

Not collective.

See also

isFinalized

Source code at petsc4py/PETSc/Sys.pyx:89

Return type:: bool

classmethod popErrorHandler()#

Remove the current error handler.

Logically collective.

See also

PetscPopErrorHandler

Source code at petsc4py/PETSc/Sys.pyx:371

Return type:: None

classmethod popSignalHandler()#

Remove the current signal handler.

Logically collective.

See also

PetscPopSignalHandler

Source code at petsc4py/PETSc/Sys.pyx:384

Return type:: None

classmethod pushErrorHandler(errhandler)#

Set the current error handler.

Logically collective.

Parameters:: errhandler (str) – The name of the error handler.
Return type:: None

See also

PetscPushErrorHandler

Source code at petsc4py/PETSc/Sys.pyx:335

classmethod registerCitation(citation)#

Not collective.

Parameters:: citation (str) – The BibTex citation entry to register.
Return type:: None

See also

PetscCitationsRegister

Source code at petsc4py/PETSc/Sys.pyx:432

classmethod setDefaultComm(comm)#

Set the default MPI communicator used to create PETSc objects.

Logically collective.

Parameters:: comm (Comm | None) – MPI communicator. If set to None, uses COMM_WORLD.
Return type:: None

See also

getDefaultComm

Source code at petsc4py/PETSc/Sys.pyx:132

classmethod sleep(seconds=1.0)#

Sleep some number of seconds.

Not collective.

Parameters:: seconds (float) – Time to sleep in seconds.
Return type:: None

See also

PetscSleep

Source code at petsc4py/PETSc/Sys.pyx:314

classmethod splitOwnership(size, bsize=None, comm=None)#

Given a global (or local) size determines a local (or global) size.

Collective.

Parameters:

size (int | tuple[int, int]) – Global size N or 2-tuple (n, N) with local and global sizes. Either of n or N (but not both) can be None.
bsize (int | None) – Block size, defaults to 1.
comm (Comm | None) – MPI communicator, defaults to getDefaultComm.

Returns:

n (int) – The local size.
N (int) – The global size.

Return type:

tuple[int, int]

Notes

The size argument corresponds to the full size of the vector. That is, an array with 10 blocks and a block size of 3 will have a size of 30, not 10.

See also

PetscSplitOwnership

Source code at petsc4py/PETSc/Sys.pyx:264

classmethod syncFlush(comm=None)#

Flush output from previous syncPrint calls.

Collective.