mpi4py.MPI.Intracomm

class mpi4py.MPI.Intracomm

Bases: Comm

Intracommunicator

static __new__(cls, comm=None)

Parameters:

comm (Intracomm | None) –

Return type:

Intracomm

Methods Summary

Accept(port_name[, info, root])	Accept a request to form a new intercommunicator
Cart_map(dims[, periods])	Return an optimal placement for the calling process on the physical machine
Connect(port_name[, info, root])	Make a request to form a new intercommunicator
Create_cart(dims[, periods, reorder])	Create cartesian communicator
Create_dist_graph(sources, degrees, destinations)	Create distributed graph communicator
Create_dist_graph_adjacent(sources, destinations)	Create distributed graph communicator
Create_from_group(group[, stringtag, info, ...])	Create communicator from group
Create_graph(index, edges[, reorder])	Create graph communicator
Create_group(group[, tag])	Create communicator from group
Create_intercomm(local_leader, peer_comm, ...)	Create intercommunicator
Exscan(sendbuf, recvbuf[, op])	Exclusive Scan
Exscan_init(sendbuf, recvbuf[, op, info])	Inclusive Scan
Graph_map(index, edges)	Return an optimal placement for the calling process on the physical machine
Iexscan(sendbuf, recvbuf[, op])	Inclusive Scan
Iscan(sendbuf, recvbuf[, op])	Inclusive Scan
Scan(sendbuf, recvbuf[, op])	Inclusive Scan
Scan_init(sendbuf, recvbuf[, op, info])	Inclusive Scan
Spawn(command[, args, maxprocs, info, root, ...])	Spawn instances of a single MPI application
Spawn_multiple(command[, args, maxprocs, ...])	Spawn instances of multiple MPI applications
exscan(sendobj[, op])	Exclusive Scan
scan(sendobj[, op])	Inclusive Scan

Methods Documentation

Accept(port_name, info=INFO_NULL, root=0)

Accept a request to form a new intercommunicator

Parameters:

• port_name (str) –

• info (Info) –

• root (int) –

Return type:

Intercomm

Cart_map(dims, periods=None)

Return an optimal placement for the calling process on the physical machine

Parameters:

• dims (Sequence[int]) –

• periods (Sequence[bool] | None) –

Return type:

int

Connect(port_name, info=INFO_NULL, root=0)

Make a request to form a new intercommunicator

Parameters:

• port_name (str) –

• info (Info) –

• root (int) –

Return type:

Intercomm

Create_cart(dims, periods=None, reorder=False)

Create cartesian communicator

Parameters:

• dims (Sequence[int]) –

• periods (Sequence[bool] | None) –

• reorder (bool) –

Return type:

Cartcomm

Create_dist_graph(sources, degrees, destinations, weights=None, info=INFO_NULL, reorder=False)

Create distributed graph communicator

Parameters:

• sources (Sequence[int]) –

• degrees (Sequence[int]) –

• destinations (Sequence[int]) –

• weights (Sequence[int] | None) –

• info (Info) –

• reorder (bool) –

Return type:

Distgraphcomm

Create_dist_graph_adjacent(sources, destinations, sourceweights=None, destweights=None, info=INFO_NULL, reorder=False)

Create distributed graph communicator

Parameters:

• sources (Sequence[int]) –

• destinations (Sequence[int]) –

• sourceweights (Sequence[int] | None) –

• destweights (Sequence[int] | None) –

• info (Info) –

• reorder (bool) –

Return type:

Distgraphcomm

classmethod Create_from_group(group, stringtag='org.mpi4py', info=INFO_NULL, errhandler=None)

Create communicator from group

Parameters:

• group (Group) –

• stringtag (str) –

• info (Info) –

• errhandler (Errhandler | None) –

Return type:

Intracomm

Create_graph(index, edges, reorder=False)

Create graph communicator

Parameters:

• index (Sequence[int]) –

• edges (Sequence[int]) –

• reorder (bool) –

Return type:

Graphcomm

Create_group(group, tag=0)

Create communicator from group

Parameters:

• group (Group) –

• tag (int) –

Return type:

Intracomm

Create_intercomm(local_leader, peer_comm, remote_leader, tag=0)

Create intercommunicator

Parameters:

• local_leader (int) –

• peer_comm (Intracomm) –

• remote_leader (int) –

• tag (int) –

Return type:

Intercomm

Exscan(sendbuf, recvbuf, op=SUM)

Exclusive Scan

Parameters:

• sendbuf (BufSpec | InPlace) –

• recvbuf (BufSpec) –

• op (Op) –

Return type:

None

Exscan_init(sendbuf, recvbuf, op=SUM, info=INFO_NULL)

Inclusive Scan

Parameters:

• sendbuf (BufSpec | InPlace) –

• recvbuf (BufSpec) –

• op (Op) –

• info (Info) –

Return type:

Prequest

Graph_map(index, edges)

Return an optimal placement for the calling process on the physical machine

Parameters:

• index (Sequence[int]) –

• edges (Sequence[int]) –

Return type:

int

Iexscan(sendbuf, recvbuf, op=SUM)

Inclusive Scan

Parameters:

• sendbuf (BufSpec | InPlace) –

• recvbuf (BufSpec) –

• op (Op) –

Return type:

Request

Iscan(sendbuf, recvbuf, op=SUM)

Inclusive Scan

Parameters:

• sendbuf (BufSpec | InPlace) –

• recvbuf (BufSpec) –

• op (Op) –

Return type:

Request

Scan(sendbuf, recvbuf, op=SUM)

Inclusive Scan

Parameters:

• sendbuf (BufSpec | InPlace) –

• recvbuf (BufSpec) –

• op (Op) –

Return type:

None

Scan_init(sendbuf, recvbuf, op=SUM, info=INFO_NULL)

Inclusive Scan

Parameters:

• sendbuf (BufSpec | InPlace) –

• recvbuf (BufSpec) –

• op (Op) –

• info (Info) –

Return type:

Prequest

Spawn(command, args=None, maxprocs=1, info=INFO_NULL, root=0, errcodes=None)

Spawn instances of a single MPI application

Parameters:

• command (str) –

• args (Sequence[str] | None) –

• maxprocs (int) –

• info (Info) –

• root (int) –

• errcodes (list | None) –

Return type:

Intercomm

Spawn_multiple(command, args=None, maxprocs=None, info=INFO_NULL, root=0, errcodes=None)

Spawn instances of multiple MPI applications

Parameters:

• command (Sequence[str]) –

• args (Sequence[Sequence[str]] | None) –

• maxprocs (Sequence[int] | None) –

• info (Info | Sequence[Info]) –

• root (int) –

• errcodes (list | None) –

Return type:

Intercomm

exscan(sendobj, op=SUM)

Exclusive Scan

Parameters:

• sendobj (Any) –

• op (Op | Callable[[Any, Any], Any]) –

Return type:

Any

scan(sendobj, op=SUM)

Inclusive Scan

Parameters:

• sendobj (Any) –

• op (Op | Callable[[Any, Any], Any]) –

Return type:

Any