Fixes for cython version 3.0.x

PDSim/flow/flow.pxd

@@ -28,7 +28,7 @@ cdef class FlowPathCollection(list):
     cpdef calculate(self)
     cpdef get_deepcopy(self)
     cpdef sumterms(self, arraym summerdT, arraym summerdm)
-    cpdef list flow_paths
+    cdef list flow_paths
 
 #Make a stripped down class with the necessary terms included
 cdef class FlowPath(object):

PDSim/flow/flow_models.pxd

@@ -21,9 +21,9 @@ cpdef double IsentropicNozzle(double A, State State_up, State State_down, int ot
 cdef class FlowFunction(object):
     cpdef double call(self, FlowPath FP) except *
     cpdef resize(self, int Nvalues)
-    cpdef public arraym flows
-    cpdef public int Nflows
-    cpdef public __name__, __strf__
+    cdef public arraym flows
+    cdef public int Nflows
+    cdef public __name__, __strf__
 
 cdef class PyFlowFunctionWrapper(FlowFunction):
     cdef public dict kwargs

PDSim/flow/flow_models.pyx

@@ -613,7 +613,7 @@ cpdef double IsentropicNozzle(double A, State State_up, State State_down, int ot
     """
 
     #some cython type declarations
-    cython.declare(T_up = cython.double, T_down = cython.double, mdot = cython.double)
+    cython.declare(T_up = cython.double, T_down = cython.double, mdot = cython.double, pr=cython.double, pr_crit=cython.double, gamma=cython.double, k=cython.double)
     # Since ideal, R=cp-cv, and k=cp/cv
     cp = State_up.get_cp0()
     R = 8314.472/State_up.get_MM() #[J/kg/K]

pyproject.toml

@@ -1,4 +1,4 @@
 [build-system]
 # Minimum requirements for the build system to execute.
-requires = ["setuptools > 35", "numpy", "cython<3.0", "coolprop"]  # PEP 518 specifications.
-build-backend = "setuptools.build_meta"
+requires = ["setuptools > 35", "numpy", "cython", "coolprop"]  # PEP 518 specifications.
+build-backend = "setuptools.build_meta"

setup.py

@@ -103,8 +103,8 @@ def clean():
     sources = [pyx_file]
     #Try to find a PXD backpack if possible
     pxd_file = pyx_file.rsplit('.',1)[0]+'.pxd'
-    if os.path.exists(pxd_file):
-        sources+=[pxd_file]
+    # if os.path.exists(pxd_file):
+    #     sources+=[pxd_file]
     pxd_files.append(pxd_file)
 
     # Add sources for clipper module