Before adding universal_newlines=True to meta.py subprocesses

meta.py

@@ -2,15 +2,31 @@
 
 import subprocess, ast
 
-p = subprocess.Popen('./verifier.py',
-                     stdout = subprocess.PIPE,
-                     stdin = subprocess.PIPE)
+verifier, prover = [subprocess.Popen(f'./{program}.py', stdout = subprocess.PIPE, stdin = subprocess.PIPE, stderr = subprocess.DEVNULL) for program in ('verifier', 'prover')]
 
-lines = p.communicate()[0].decode('ascii').splitlines()
-print(lines)
-protocolInitializationPhaseId = ast.literal_eval(lines[0].split('=')[1])
+def getProgramLine(program):
+    return program.stdout.readline().decode('ascii')
+
+def getOutput(line):
+    return ast.literal_eval(line.split('=')[1])
+
+def getProgramOutput(program):
+    return getOutput(getProgramLine(program))
+
+protocolInitializationPhaseId = getProgramOutput(verifier)
 print(f'{protocolInitializationPhaseId=}')
-protocolExecutionPhaseId = ast.literal_eval(lines[1].split('=')[1])
+protocolExecutionPhaseId = getProgramOutput(verifier)
 print(f'{protocolExecutionPhaseId=}')
 
+prover.stdin.write(protocolInitializationPhaseId.encode('ascii') + b'\n')
+#getProgramLine(prover)
+#getProgramLine(prover)
+prover.stdin.write(protocolExecutionPhaseId.encode('ascii') + b'\n')
+#prover.stdin.close()
 
+#verifier.stdin.write(b"test\n")
+
+#lines = prover.communicate()[0].decode('ascii').splitlines()
+#print(lines)
+
+print(getProgramLine(prover))