| pyvgx Vertex Miscellaneous Methods | Description |
|---|---|
Set or change the vertex type |
|
Get the vertex type |
|
Get the vertex type enumeration code |
|
Commit all vertex modifications |
|
Check if vertex is virtual |
|
Return a dictionary representation of the vertex |
|
Return a human readable formatted string representing the pyvgx.Vertex.descriptor |
1. pyvgx.Vertex.SetType()
Set or change the vertex type.
1.1. Syntax
pyvgx.Vertex.SetType( type )1.2. Parameters
type: Vertex type (str) or None
1.3. Remarks
This method changes the vertex type. If type is None or empty string the vertex becomes typeless.
1.4. Return Value
None
1.5. Example
from pyvgx import *
g = Graph( "g1" )
A = g.NewVertex( "A" ) # A is typeless
B = g.NewVertex( "B", "node" ) # B type = "node"
A.SetType( "thing" ) # A type now = "thing"
B.SetType( None ) # B now typeless2. pyvgx.Vertex.GetType()
Return the vertex type.
2.1. Syntax
pyvgx.Vertex.GetType()2.2. Return Value
Return the type name set at vertex creation or the most recent call to SetType(). The reserved type name "vertex" is returned for typeless vertices.
2.3. Example
from pyvgx import *
g = Graph( "g1" )
A = g.NewVertex( "A" ) # A is typeless
B = g.NewVertex( "B", "node" ) # B type = "node"
A.GetType() # -> "__vertex__"
B.GetType() # -> "node"3. pyvgx.Vertex.GetTypeEnum()
Return the vertex type enumeration code.
3.1. Syntax
pyvgx.Vertex.GetTypeEnum()3.2. Return Value
Return the type enumeration (int) code representing the vertex type.
3.3. Example
from pyvgx import *
g = Graph( "g1" )
A = g.NewVertex( "A" ) # A is typeless
B = g.NewVertex( "B", "node" ) # B type = "node"
A.GetTypeEnum() # -> 17
B.GetTypeEnum() # -> 1324. pyvgx.Vertex.Commit()
Commit all vertex modifications and mark vertex object as dirty. This has the same effect as CloseVertex() but without releasing the lock. Returns the graph operation id.
4.1. Syntax
pyvgx.Vertex.Commit()4.2. Return Value
Graph operation id.
4.3. Example
from pyvgx import *
g = Graph( "g1" )
A = g.NewVertex( "A" )
A.Commit() # -> 10000000000000002
A.Writable() # True
A['x'] = 123
A.Commit() # -> 10000000000000003
g.CloseVertex( A ) # True5. pyvgx.Vertex.IsVirtual()
Return True if vertex is virtual, otherwise False.
6. pyvgx.Vertex.AsDict()
Return a dictionary representation of the vertex.
6.1. Syntax
pyvgx.Vertex.AsDict()6.2. Return Value
A Python dictionary of the vertex attributes, flags and states.
6.3. Example
from pyvgx import *
import pprint
A = g.NewVertex( "Alice", type="person" )
g.Connect( "Alice", "knows", "Bob" )
A["occupation"] = "Software Engineer"
A["age"] = 29
A.SetVector( [("java",1.2), ("c++",0.89), ("python",0.73)] )
pprint.pprint( A.AsDict() )
# Prints:
# {'allocator': {'aidx': 2,
# 'bidx': 0,
# 'flags.invl': 0,
# 'flags.ovsz': 0,
# 'offset': 0,
# 'refc': 4,
# 'size': 1},
# 'created-time': 1504225659,
# 'degree': 1,
# 'descriptor': 122513461082088878,
# 'expires-time': 4294967295,
# 'id': 'Alice',
# 'indegree': 0,
# 'internalid': '10384b2187cd857b78e02fdc859c4864',
# 'man': 'REAL',
# 'modified-time': 1504225659,
# 'outdegree': 1,
# 'properties': {'age': 29, 'occupation': 'Software Engineer'},
# 'type': 'person',
# 'vector': [('java', 1.125), ('c++', 0.875), ('python', 0.6875)]}
g.CloseVertex( A )7. pyvgx.Vertex.Descriptor()
Return a human readable formatted string representing the pyvgx.Vertex.descriptor.
7.1. Syntax
pyvgx.Vertex.Descriptor()7.2. Return Value
The descriptor is returned as a string:
[semaphore.count] [type] [ [<MAN> <PRE>] [<YIB> <INY> <WRQ> <RWL> <LCK>] ] [ [<IN> <OUT>] [<CTR> <VEC>] [<FLD>] [0] ] [writer.threadid]
Please see pyvgx.Vertex.descriptor for a detailed explanation of the different values.
