wntr.epanet.toolkit module

The wntr.epanet.toolkit module is a Python extensions for the EPANET Programmers Toolkit DLLs.

Contents

runepanet(inpfile[, rptfile, binfile])	Run an EPANET command-line simulation
ENepanet([inpfile, rptfile, binfile, version])	Wrapper class to load the EPANET DLL object, then perform operations on the EPANET object that is created when a file is loaded.
EpanetException
ENgetwarning(code[, sec])

exception wntr.epanet.toolkit.EpanetException

Bases: Exception

wntr.epanet.toolkit.runepanet(inpfile, rptfile=None, binfile=None)

Run an EPANET command-line simulation

Parameters

inpfile (str) – The input file name

class wntr.epanet.toolkit.ENepanet(inpfile='', rptfile='', binfile='', version=2.2)

Bases: object

Wrapper class to load the EPANET DLL object, then perform operations on the EPANET object that is created when a file is loaded.

Parameters

• inpfile (str) – Input file to use

• rptfile (str) – Output file to report to

• binfile (str) – Results file to generate

• version (float) – EPANET version to use (either 2.0 or 2.2)

errcode = 0

Return code from the EPANET library functions

Warnflag = False

A warning occurred at some point during EPANET execution

Errflag = False

A fatal error occurred at some point during EPANET execution

inpfile = 'temp.inp'

The name of the EPANET input file

rptfile = 'temp.rpt'

The report file to generate

binfile = 'temp.bin'

The optional binary output file

ENlib = None

The variable that holds the ctypes Library object

isOpen()

Checks to see if the file is open

ENopen(inpfile=None, rptfile=None, binfile=None)

Opens an EPANET input file and reads in network data

Parameters

• inpfile (str) – EPANET INP file (default to constructor value)

• rptfile (str) – Output file to create (default to constructor value)

• binfile (str) – Binary output file to create (default to constructor value)

ENclose()

Frees all memory and files used by EPANET

ENsolveH()

Solves for network hydraulics in all time periods

ENsaveH()

Solves for network hydraulics in all time periods

Must be called before ENreport() if no water quality simulation made. Should not be called if ENsolveQ() will be used.

ENopenH()

Sets up data structures for hydraulic analysis

ENinitH(iFlag)

Initializes hydraulic analysis

Parameters

iFlag (2-digit flag) – 2-digit flag where 1st (left) digit indicates if link flows should be re-initialized (1) or not (0) and 2nd digit indicates if hydraulic results should be saved to file (1) or not (0)

ENrunH()

Solves hydraulics for conditions at time t

This function is used in a loop with ENnextH() to run an extended period hydraulic simulation. See ENsolveH() for an example.

Returns

int – Current simulation time (seconds)

ENnextH()

Determines time until next hydraulic event

This function is used in a loop with ENrunH() to run an extended period hydraulic simulation. See ENsolveH() for an example.

Returns

int – Time (seconds) until next hydraulic event (0 marks end of simulation period)

ENcloseH()

Frees data allocated by hydraulics solver

ENsavehydfile(filename)

Copies binary hydraulics file to disk

Parameters

filename (str) – Name of hydraulics file to output

ENusehydfile(filename)

Opens previously saved binary hydraulics file

Parameters

filename (str) – Name of hydraulics file to use

ENsolveQ()

Solves for network water quality in all time periods

ENopenQ()

Sets up data structures for water quality analysis

ENinitQ(iSaveflag)

Initializes water quality analysis

Parameters

iSaveflag (int) – EN_SAVE (1) if results saved to file, EN_NOSAVE (0) if not

ENrunQ()

Retrieves hydraulic and water quality results at time t

This function is used in a loop with ENnextQ() to run an extended period water quality simulation. See ENsolveQ() for an example.

Returns

int – Current simulation time (seconds)

ENnextQ()

Advances water quality simulation to next hydraulic event

This function is used in a loop with ENrunQ() to run an extended period water quality simulation. See ENsolveQ() for an example.

Returns

int – Time (seconds) until next hydraulic event (0 marks end of simulation period)

ENcloseQ()

Frees data allocated by water quality solver

ENreport()

Writes report to report file

ENgetcount(iCode)

Retrieves the number of components of a given type in the network

Parameters

iCode (int) – Component code (see toolkit.optComponentCounts)

Returns

int – Number of components in network

ENgetflowunits()

Retrieves flow units code

Returns

Code of flow units in use (see toolkit.optFlowUnits)

ENgetnodeindex(sId)

Retrieves index of a node with specific ID

Parameters

sId (int) – Node ID

Returns

Index of node in list of nodes

ENgetnodevalue(iIndex, iCode)

Retrieves parameter value for a node

Parameters

• iIndex (int) – Node index

• iCode (int) – Node parameter code (see toolkit.optNodeParams)

Returns

Value of node’s parameter

ENgetlinkindex(sId)

Retrieves index of a link with specific ID

Parameters

sId (int) – Link ID

Returns

Index of link in list of links

ENgetlinkvalue(iIndex, iCode)

Retrieves parameter value for a link

Parameters

• iIndex (int) – Link index

• iCode (int) – Link parameter code (see toolkit.optLinkParams)

Returns

Value of link’s parameter

ENsaveinpfile(inpfile)

Saves EPANET input file

Parameters

inpfile (str) – EPANET INP output file