Windows support redux

examples/average_time.py

@@ -2,29 +2,30 @@
 from qsearch import unitaries, advanced_unitaries
 import time
 
-with qsearch.Project("benchmarks") as project:
-    project.add_compilation("qft2", unitaries.qft(4))
-    project.add_compilation("qft3", unitaries.qft(8))
-    project.add_compilation("fredkin", unitaries.fredkin)
-    project.add_compilation("toffoli", unitaries.toffoli)
-    project.add_compilation("peres", unitaries.peres)
-    project.add_compilation("or", unitaries.logical_or)
+if __name__ == "__main__":
+    with qsearch.Project("benchmarks") as project:
+        project.add_compilation("qft2", unitaries.qft(4))
+        project.add_compilation("qft3", unitaries.qft(8))
+        project.add_compilation("fredkin", unitaries.fredkin)
+        project.add_compilation("toffoli", unitaries.toffoli)
+        project.add_compilation("peres", unitaries.peres)
+        project.add_compilation("or", unitaries.logical_or)
 
-    project.add_compilation("miro", advanced_unitaries.mirogate)
-    project.add_compilation("hhl", advanced_unitaries.HHL)
+        project.add_compilation("miro", advanced_unitaries.mirogate)
+        project.add_compilation("hhl", advanced_unitaries.HHL)
 
-    # run the benchmarks script with default settings 10x and average the timing results
-    # reported times are between 0.1s and 5s on my 2018 Macbook Pro
+        # run the benchmarks script with default settings 10x and average the timing results
+        # reported times are between 0.1s and 5s on my 2018 Macbook Pro
 
-    times = {}
-    for compilation in project.compilations:
-        times[compilation] = 0
-
-    for _ in range(10):
-        project.reset()
-        project.run()
+        times = {}
         for compilation in project.compilations:
-            times[compilation] += project.get_time(compilation)
+            times[compilation] = 0
+
+        for _ in range(10):
+            project.reset()
+            project.run()
+            for compilation in project.compilations:
+                times[compilation] += project.get_time(compilation)
 
-    for compilation in project.compilations:
-        print(f'Compilation {compilation} took {times[compilation]/10}s on average.')
+        for compilation in project.compilations:
+            print(f'Compilation {compilation} took {times[compilation]/10}s on average.')

examples/benchmarks.py

@@ -2,36 +2,37 @@
 from qsearch import unitaries, advanced_unitaries, leap_compiler, multistart_solver, parallelizer
 import time
 
-# create the project
-with qsearch.Project("benchmarks") as project:
-    # add a unitaries to compile
-    project.add_compilation("qft2", unitaries.qft(4))
-    project.add_compilation("qft3", unitaries.qft(8))
-    project.add_compilation("fredkin", unitaries.fredkin)
-    project.add_compilation("toffoli", unitaries.toffoli)
-    project.add_compilation("peres", unitaries.peres)
-    project.add_compilation("or", unitaries.logical_or)
+if __name__ == "__main__":
+    # create the project
+    with qsearch.Project("benchmarks") as project:
+        # add a unitaries to compile
+        project.add_compilation("qft2", unitaries.qft(4))
+        project.add_compilation("qft3", unitaries.qft(8))
+        project.add_compilation("fredkin", unitaries.fredkin)
+        project.add_compilation("toffoli", unitaries.toffoli)
+        project.add_compilation("peres", unitaries.peres)
+        project.add_compilation("or", unitaries.logical_or)
 
-    project.add_compilation("miro", advanced_unitaries.mirogate)
-    project.add_compilation("hhl", advanced_unitaries.HHL)
+        project.add_compilation("miro", advanced_unitaries.mirogate)
+        project.add_compilation("hhl", advanced_unitaries.HHL)
 
-    # 4 qubit benchmarks (WARNING: These may take days to run.)
-    #project.add_compilation("qft4", unitaries.qft(16))
-    #project.add_compilation("full adder", unitaries.full_adder)
-    #project.add_compilation("ethylene", advanced_unitaries.ethylene)
+        # 4 qubit benchmarks (WARNING: These may take days to run.)
+        #project.add_compilation("qft4", unitaries.qft(16))
+        #project.add_compilation("full adder", unitaries.full_adder)
+        #project.add_compilation("ethylene", advanced_unitaries.ethylene)
 
-    # compiler configuration example
-    #project["gateset"] = qsearch.gatesets.QubitCNOTRing() # use this to synthesize for the ring topology instead of the default line topology
-    #project["solver"]  = qsearch.solver.BFGS_Jac_Solver() # use this to force the compiler to use the BFGS solver instead of using the default setting
-    #project["verbosity"] = 2 # use this to have more information reported to stdout and the log files, or set it to 0 to disable logging altogether
-    # once everything is set up, let the project run!
-    project.run()
+        # compiler configuration example
+        #project["gateset"] = qsearch.gatesets.QubitCNOTRing() # use this to synthesize for the ring topology instead of the default line topology
+        #project["solver"]  = qsearch.solver.BFGS_Jac_Solver() # use this to force the compiler to use the BFGS solver instead of using the default setting
+        #project["verbosity"] = 2 # use this to have more information reported to stdout and the log files, or set it to 0 to disable logging altogether
+        # once everything is set up, let the project run!
+        project.run()
 
 
-    # once its done you can use the following functions to get output
-    # compilation_names = project.compilations # returns a list of the names that were specified when adding unitaries
-    # circuit, vector = project.get_result(compilation_names[0]) # get a circuit/vector combination, which is the search_compiler format for describing finished circuits
-    # project.assemble(compilation_names[0], write_location="my_circuit.qasm") # export the circuit as openqasm
-    # project.assemble(compilation_names[0], language=assembly.ASSEMBLY_QISKIT, write_location="my_circuit.py") # export the circuit as a qiskit script
+        # once its done you can use the following functions to get output
+        # compilation_names = project.compilations # returns a list of the names that were specified when adding unitaries
+        # circuit, vector = project.get_result(compilation_names[0]) # get a circuit/vector combination, which is the search_compiler format for describing finished circuits
+        # project.assemble(compilation_names[0], write_location="my_circuit.qasm") # export the circuit as openqasm
+        # project.assemble(compilation_names[0], language=assembly.ASSEMBLY_QISKIT, write_location="my_circuit.py") # export the circuit as a qiskit script
 
-    # Read the wiki for more information and more features: https://github.com/WolfLink/search_compiler/wiki
+        # Read the wiki for more information and more features: https://github.com/WolfLink/search_compiler/wiki

qsearch/parallelizer.py

@@ -26,7 +26,10 @@ def done(self):
 
 class MultiprocessingParallelizer(Parallelizer):
     def __init__(self, options):
-        ctx = get_context("fork")
+        if sys.platform != 'win32':
+            ctx = get_context('fork')
+        else:
+            ctx = get_context()
         options.set_smart_defaults(num_tasks=default_num_tasks)
         self.pool = ctx.Pool(options.num_tasks)
         self.process_func = partial(evaluate_step, options=options)
@@ -42,8 +45,8 @@ def done(self):
 class ProcessPoolParallelizer(Parallelizer):
     def __init__(self, options):
         options.set_smart_defaults(num_tasks=default_num_tasks)
-        if sys.version_info >= (3, 8, 0):
-            ctx = get_context("fork")
+        if sys.version_info >= (3, 8, 0) and sys.platform != 'win32':
+            ctx = get_context('fork')
             self.pool = ProcessPoolExecutor(options.num_tasks, mp_context=ctx)
         else:
             self.pool = ProcessPoolExecutor(options.num_tasks)