metawards.Nodes
- class metawards.Nodes(N: int = 0)[source]
This is a container class for Nodes. This uses Python arrays to store a list of Node objects as a “struct of arrays”. This should improve speed of loading and access.
Methods
__delattr__(name, /)Implement delattr(self, name).
__dir__()Default dir() implementation.
__eq__(value, /)Return self==value.
__format__(format_spec, /)Default object formatter.
__ge__(value, /)Return self>=value.
__getattribute__(name, /)Return getattr(self, name).
__getitem__(i)Return the node at index 'i'.
__gt__(value, /)Return self>value.
__hash__()Return hash(self).
__init__([N])Create a container for up to "N" nodes
__init_subclass__This method is called when a class is subclassed.
__le__(value, /)Return self<=value.
__len__()Return the number of nodes in this container
__lt__(value, /)Return self<value.
__ne__(value, /)Return self!=value.
__new__(**kwargs)__reduce__()Helper for pickle.
__reduce_ex__(protocol, /)Helper for pickle.
__repr__()Return repr(self).
__setattr__(name, value, /)Implement setattr(self, name, value).
__setitem__(i, value)Set the item as index 'i' equal to 'value'.
__sizeof__()Size of object in memory, in bytes.
__str__()Return str(self).
__subclasshook__Abstract classes can override this to customize issubclass().
Assert that this collection of nodes is not null
Assert that the passed index 'i' is valid for this collection.
copy()Return a copy of this network, using deep copies for things which are variable, but shallow copies for things which should stay the same (e.g.
get_custom(key[, default])Return the array of custom parameters for the key called 'key'.
get_index(i)Return the mapped index for the ith node.
is_null()Return the total population of the nodes
resize(N)Resize this container to hold 'N' nodes.
scale_susceptibles([ratio, work_ratio, ...])Scale the number of susceptibles in these Nodes by the passed scale ratios.
set_custom(key, value[, index])Set the custom parameters for the key called 'key' to 'value'.
Attributes
__dict____doc____module____weakref__list of weak references to the object (if defined)
ID number for each node.
The start index for work links
The end index for work links
The index of the home commuter work link
The start index for play links
The end index for play links
The index of the home player play link
Dayime force of infection for each ward
Nighttime force of infection for each ward
Number of susceptible players in each ward
Saved value of the number of susceptible players
Night time work denominator for each ward
Day time work denominator for each ward
Night time play denominator for each ward
Day time play denominator for each ward
Daytime infection probability for each ward
Nighttime infection probability for each ward
X-coordinate of the center of each ward
Y-coordinate of the center of each ward
per-ward UV scaling parameter
per-ward cutoff value - default to a large number that is greater than any distance between points on Earth (distance in k)
per-ward bg_foi value - this the starting FOI for the ward in the FOI calculation.
Coordinate system used (x/y for X,Y in km, lat/long for latitude and longitude)
_custom_paramsDictionary of all user-provided custom parameters for each ward
- __getitem__(i: int)[source]
Return the node at index ‘i’. Note that this is a deep copy of the node. Changing the node will not change the data in this container. To update the data in this container you need to use __setitem__, e.g. via the index operator (see __setitem__)
- __setitem__(i: int, value: metawards._node.Node)[source]
Set the item as index ‘i’ equal to ‘value’. This deep-copies ‘value’ into this container
- assert_valid_index(i)[source]
Assert that the passed index ‘i’ is valid for this collection. This will return the index with Python reverse indexing, so that “-1” refers to the last node in the collection
- begin_p
The start index for play links
- begin_to
The start index for work links
- bg_foi
per-ward bg_foi value - this the starting FOI for the ward in the FOI calculation. This defaults to 0.0, but can be set to larger values if you want the ward to have a background FOI that drives infections
- coordinates
Coordinate system used (x/y for X,Y in km, lat/long for latitude and longitude)
- copy()[source]
Return a copy of this network, using deep copies for things which are variable, but shallow copies for things which should stay the same (e.g. x and y). This copy assumes that you are not changing the actual links between nodes, e.g. it shallow-copies label, begin_to, end_to, self_w, begin_p, end_p and self_p. If you are changing the links then you will need to recreate these arrays.
- cutoff
per-ward cutoff value - default to a large number that is greater than any distance between points on Earth (distance in k)
- day_foi
Dayime force of infection for each ward
- day_inf_prob
Daytime infection probability for each ward
- denominator_d
Day time work denominator for each ward
- denominator_n
Night time work denominator for each ward
- denominator_p
Night time play denominator for each ward
- denominator_pd
Day time play denominator for each ward
- end_p
The end index for play links
- end_to
The end index for work links
- get_custom(key: str, default: float = 0.0) array[float][source]
Return the array of custom parameters for the key called ‘key’. If these don’t exist then create them with the specified default value. Note that this returns a shallow copy of the array, meaning that you can modify this directly and it will change the value of the nodes. This is identical to the behaviour of the other arrays in this Nodes object (it is optimised for speed, not safety)
- get_index(i)[source]
Return the mapped index for the ith node. This will raise an IndexError if this is an invalid index. If not, it will map a negative index into a canonical positive index
- label
ID number for each node. This should equal the node index
- night_foi
Nighttime force of infection for each ward
- night_inf_prob
Nighttime infection probability for each ward
- play_suscept
Number of susceptible players in each ward
- population() int[source]
Return the total population of the nodes
- Returns
Total population
- Return type
int
- resize(N: int)[source]
Resize this container to hold ‘N’ nodes. This will expand the container if ‘N’ is greater than len(self), or will contract the container (deleting excess nodes) if ‘N’ is less than len(self). This function is called typically when you pre-allocate a large Nodes container, and then want to reduce the size to fit the number of loaded nodes
- save_play_suscept
Saved value of the number of susceptible players
- scale_susceptibles(ratio: Optional[any] = None, work_ratio: Optional[any] = None, play_ratio: Optional[any] = None)[source]
Scale the number of susceptibles in these Nodes by the passed scale ratios. These can be values, e.g. ratio = 2.0 will scale the total number of susceptibles in each ward by 2.0. They can also be lists of values, where ward[i] will be scaled by ratio[i]. They can also be dictionaries, e.g. ward[i] scaled by ratio[i]
- Parameters
ratio (None, float, list or dict) – The amount by which to scale the total population of susceptibles - evenly scales the work and play populations
work_ratio (None, float, list or dict) – Scale only the work population of susceptibles
play_ratio (None, float, list or dict) – Scale only the play population of susceptibles
- Returns
- Return type
None
- scale_uv
per-ward UV scaling parameter
- self_p
The index of the home player play link
- self_w
The index of the home commuter work link
- set_custom(key: str, value: _Union[float, array[float]], index: int = None) None[source]
Set the custom parameters for the key called ‘key’ to ‘value’. If the index is set then this just sets the value for that index. You pass in either an array of floats (thus setting all node parameters, or a single float, which is for the single ward, or will set all wards to have that value.
Note that custom parameters can only be floats!
- x
X-coordinate of the center of each ward
- y
Y-coordinate of the center of each ward