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Accept Merge Request #102: (api -> master)

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Merge Request: Add api for simulation and dump output

Created By: @王琼钰
Accepted By: @王琼钰
URL: https://tjwater.coding.net/p/tjwatercloud/d/TJWaterServer/git/merge/102
This commit is contained in:
王琼钰
2022-11-19 18:46:20 +08:00
parent 62a84f571b 80b88976a4
commit c2a62bb297
4 changed files with 190 additions and 22 deletions
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12
.gitignore vendored
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@@ -7,9 +7,13 @@ __pycache__/
# pytest
.pytest_cache/
# epanet
# dev
dev_demo.py
# db inp
*.db.inp
# calculation
*.rpt
*.opt
# dev_demo
dev_demo.py
*.opt.json

1
epanet/__init__.py Normal file
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@@ -0,0 +1 @@
from .epanet import run_project, run_inp, dump_output

187
epanet/epanet.py
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@@ -1,45 +1,196 @@
import ctypes
import platform
import os
import sys
import sys
import json
from typing import Any
sys.path.append("..")
from api import project
from api import parser
_lib_core = None
_lib_output = None
def _load_epanet():
def _verify_platform():
_platform = platform.system()
if _platform != "Windows":
raise Exception(f'Platform {_platform} unsupported (not yet)')
_lib_core = ctypes.CDLL("./epanet2.dll")
#version = ctypes.c_int()
#lib_core.EN_getversion(ctypes.byref(version))
#print(f'Load EPANET {version}')
_lib_output = ctypes.CDLL("./epanet-output.dll")
# readable True => json, False => binary output
def run_project(name: str, readable: bool = True) -> str:
class Output:
def __init__(self, path: str) -> None:
self._path = path
self._lib = ctypes.CDLL(os.path.join(os.getcwd(), 'epanet-output.dll'))
self._handle = ctypes.c_void_p()
self._check(self._lib.ENR_init(ctypes.byref(self._handle)))
self._check(self._lib.ENR_open(self._handle, ctypes.c_char_p(self._path.encode())))
def _check(self, result):
if result != 0:
msg = ctypes.c_char_p()
code = self._lib.ENR_checkError(self._handle, ctypes.byref(msg))
assert code == result
error = f'Failed to read project [{self._path}] output, message [{msg.value.decode()}]'
self._lib.ENR_free(ctypes.byref(msg))
raise Exception(error)
def version(self) -> int:
v = ctypes.c_int()
self._check(self._lib.ENR_getVersion(self._handle, ctypes.byref(v)))
return v.value
def net_size(self) -> dict[str, int]:
element_count = ctypes.POINTER(ctypes.c_int)()
length = ctypes.c_int()
self._check(self._lib.ENR_getNetSize(self._handle, ctypes.byref(element_count), ctypes.byref(length)))
assert length.value == 5
category = ['node', 'tank', 'link', 'pump', 'valve']
sizes = {}
for i in range(length.value):
sizes[category[i]] = element_count[i]
self._lib.ENR_free(ctypes.byref(element_count))
return sizes
def units(self) -> dict[str, str]:
f_us = ['CFS', 'GPM', 'MGD', 'IMGD', 'AFD', 'LPS', 'LPM', 'MLD', 'CMH', 'CMD']
p_us = ['PSI', 'MTR', 'KPA']
q_us = ['NONE', 'MGL', 'UGL', 'HOURS', 'PRCNT']
f, p, q = ctypes.c_int(1), ctypes.c_int(2), ctypes.c_int(3)
f_u, p_u, q_u = ctypes.c_int(), ctypes.c_int(), ctypes.c_int()
self._check(self._lib.ENR_getUnits(self._handle, f, ctypes.byref(f_u)))
self._check(self._lib.ENR_getUnits(self._handle, p, ctypes.byref(p_u)))
self._check(self._lib.ENR_getUnits(self._handle, q, ctypes.byref(q_u)))
return { 'flow': f_us[f_u.value], 'pressure': p_us[p_u.value], 'quality': q_us[q_u.value] }
def times(self) -> dict[str, int]:
ts = []
for i in range(1, 5):
t = ctypes.c_int(1)
self._check(self._lib.ENR_getTimes(self._handle, ctypes.c_int(i), ctypes.byref(t)))
ts.append(t.value)
d = {}
category = ['report_start', 'report_step', 'sim_duration', 'num_periods']
for i in range(4):
d[category[i]] = ts[i]
return d
def element_name(self) -> dict[str, list[str]]:
sizes = self.net_size()
node_type = ctypes.c_int(1)
nodes = []
for i in range(1, sizes['node'] + 1):
name = ctypes.c_char_p()
name_len = ctypes.c_int()
self._check(self._lib.ENR_getElementName(self._handle, node_type, ctypes.c_int(i), ctypes.byref(name), ctypes.byref(name_len)))
nodes.append(name.value.decode())
self._lib.ENR_free(ctypes.byref(name))
link_type = ctypes.c_int(2)
links = []
for i in range(1, sizes['link'] + 1):
name = ctypes.c_char_p()
name_len = ctypes.c_int()
self._check(self._lib.ENR_getElementName(self._handle, link_type, ctypes.c_int(i), ctypes.byref(name), ctypes.byref(name_len)))
links.append(name.value.decode())
self._lib.ENR_free(ctypes.byref(name))
return { 'nodes' : nodes, 'links': links }
# { pump_index, link_index, utilization, avg.efficiency, avg.kW/flow, avg.kwatts, max.kwatts, cost/day }
def energy_usage(self) -> list[dict[str, Any]]:
size = self.net_size()['pump']
usages = []
category = ['utilization', 'avg.efficiency', 'avg.kW/flow', 'avg.kwatts', 'max.kwatts', 'cost/day' ]
for i in range(1, size + 1):
index = ctypes.c_int()
values = ctypes.POINTER(ctypes.c_float)()
length = ctypes.c_int()
self._check(self._lib.ENR_getEnergyUsage(self._handle, ctypes.c_int(i), ctypes.byref(index), ctypes.byref(values), ctypes.byref(length)))
assert length.value == 6
d = { 'pump_index' : i - 1, 'link_index' : index.value - 1 }
for j in range(length.value):
d |= { category[j] : values[j] }
usages.append(d)
return usages
def dump(self, cache: bool = True) -> str:
data = {}
data |= { 'version' : self.version() }
data |= { 'net_size' : self.net_size() }
data |= { 'units' : self.units() }
data |= { 'times' : self.times() }
data |= { 'element_name' : self.element_name() }
data |= { 'energy_usage' : self.energy_usage() }
if cache:
with open(self._path + '.json', 'w') as f:
json.dump(data, f)
return json.dumps(data)
def __del__(self):
# throw exception in destructor ? :)
self._check(self._lib.ENR_close(ctypes.byref(self._handle)))
def dump_output(path: str) -> str:
opt = Output(path)
return opt.dump()
def run_project(name: str) -> str:
if not project.have_project(name):
raise Exception("No such project!")
raise Exception(f'Not found project [{name}]')
dir = os.path.dirname(os.getcwd())
db_inp = os.path.join(os.path.join(dir, 'db_inp'), name + '.db.inp')
parser.dump_inp(name, db_inp)
name += '.db'
input = name + '.db'
exe = os.path.join(os.path.join(dir, 'epanet'), 'runepanet.exe')
inp = os.path.join(os.path.join(dir, 'db_inp'), input + '.inp')
rpt = os.path.join(os.path.join(dir, 'temp'), input + '.rpt')
opt = os.path.join(os.path.join(dir, 'temp'), input + '.opt')
command = f'{exe} {inp} {rpt} {opt}'
result = os.system(command)
if result != 0:
msg = f'Failed to run simulation for project [{name}]'
raise Exception(msg)
return dump_output(opt)
def run_inp(name: str) -> str:
dir = os.path.dirname(os.getcwd())
exe = os.path.join(os.path.join(dir, 'epanet'), 'runepanet.exe')
inp = os.path.join(os.path.join(dir, 'db_inp'), name + '.inp')
inp = os.path.join(os.path.join(dir, 'inp'), name + '.inp')
rpt = os.path.join(os.path.join(dir, 'temp'), name + '.rpt')
opt = os.path.join(os.path.join(dir, 'temp'), name + '.opt')
command = f'{exe} {inp} {rpt} {opt}'
#print(command)
result = os.system(command)
return ''
if result != 0:
msg = f'Failed to run simulation for project [{name}]'
raise Exception(msg)
return dump_output(opt)
if __name__ == '__main__':
_load_epanet()
run_project('net3')
_verify_platform()
print(run_inp('net3'))

12
tjnetwork.py
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@@ -1,5 +1,6 @@
from typing import Any
import api
import epanet
############################################################
@@ -129,6 +130,17 @@ def read_inp(name: str, inp: str) -> None:
def dump_inp(name: str, inp: str) -> None:
return api.dump_inp(name, inp)
def run_project(name: str) -> str:
return epanet.run_project(name)
# put in inp folder, name without extension
def run_inp(name: str) -> str:
return epanet.run_inp(name)
# path is absolute path
def dump_output(path: str) -> str:
return epanet.dump_output(path)
############################################################
# operation