mmgen-tool twimport: use aiohttp backend by default

mmgen/main_tool.py

@@ -364,12 +364,18 @@ if g.prog_name == 'mmgen-tool' and not opt._lock:
 	if len(po.cmd_args) < 1:
 		opts.usage()
 
-	cls = get_cmd_cls(po.cmd_args[0])
+	cmd = po.cmd_args[0]
+
+	cls = get_cmd_cls(cmd)
 
 	if not cls:
-		die(1,f'{po.cmd_args[0]!r}: no such command')
+		die(1,f'{cmd!r}: no such command')
 
-	cmd,*args = opts.init( opts_data, parsed_opts=po, need_proto=cls.need_proto )
+	cmd,*args = opts.init(
+		opts_data,
+		parsed_opts = po,
+		need_proto  = cls.need_proto,
+		init_opts   = {'rpc_backend':'aiohttp'} if cmd == 'twimport' else None )
 
 	if cmd in ('help','usage') and args:
 		args[0] = 'command_name=' + args[0]

test/test_py_d/ts_regtest.py

@@ -1104,10 +1104,14 @@ class TestSuiteRegtest(TestSuiteBase,TestSuiteShared):
 		self.write_to_tmpfile( fn, json.dumps(text,indent=4) )
 		return 'ok'
 
-	def carol_twimport(self,add_args=[],add_parms=[],expect_str=None,expect_str2='Found 1 unspent output'):
+	def carol_twimport(self,rpc_backend='http',add_parms=[],expect_str=None,expect_str2='Found 1 unspent output'):
 		from mmgen.tw.json import TwJSON
 		fn = joinpath( self.tmpdir, TwJSON.Base(self.proto).dump_fn )
-		t = self.spawn('mmgen-tool', add_args + ['--carol','twimport',fn] + add_parms)
+		t = self.spawn(
+			'mmgen-tool',
+			([f'--rpc-backend={rpc_backend}'] if rpc_backend else [])
+			+ ['--carol','twimport',fn]
+			+ add_parms )
 		t.expect('(y/N): ','y')
 		if expect_str:
 			t.expect(expect_str)
@@ -1119,7 +1123,7 @@ class TestSuiteRegtest(TestSuiteBase,TestSuiteShared):
 		return t
 
 	def carol_twimport_nochksum(self):
-		return self.carol_twimport(add_args=['--rpc-backend=aio'],add_parms=['ignore_checksum=true'])
+		return self.carol_twimport(rpc_backend=None,add_parms=['ignore_checksum=true'])
 
 	def carol_twimport_batch(self):
 		return self.carol_twimport(add_parms=['batch=true'])
@@ -1528,7 +1532,7 @@ class TestSuiteRegtest(TestSuiteBase,TestSuiteShared):
 	def carol_twimport2(self):
 		u,b = (4,3) if self.proto.cap('segwit') else (3,2)
 		return self.carol_twimport(
-			add_args    = ['--rpc-backend=aio'],
+			rpc_backend = None,
 			add_parms   = ['ignore_checksum=true'],
 			expect_str2 =  f'Found {u} unspent outputs in {b} blocks' )