super(): use zero-arg form where possible

mmgen/altcoins/eth/tw.py

@@ -282,7 +282,7 @@ Actions:         [q]uit view, [p]rint to file, pager [v]iew, [w]ide view,
 
 	def do_sort(self,key=None,reverse=False):
 		if key == 'txid': return
-		super(EthereumTwUnspentOutputs,self).do_sort(key=key,reverse=reverse)
+		super().do_sort(key=key,reverse=reverse)
 
 	def get_unspent_rpc(self):
 		wl = self.wallet.sorted_list
@@ -305,7 +305,7 @@ class EthereumTokenTwUnspentOutputs(EthereumTwUnspentOutputs):
 
 	# NB: two wallet instances open simultaneously on the same data:
 	def get_unspent_data(self):
-		super(type(self),self).get_unspent_data()
+		super().get_unspent_data()
 		for e in self.unspent:
 			e.amt2 = self.wallet.get_eth_balance(e.addr)
 

mmgen/altcoins/eth/tx.py

@@ -49,7 +49,7 @@ class EthereumMMGenTX(MMGenTX):
 	usr_contract_data = HexStr('')
 
 	def __init__(self,*args,**kwargs):
-		super(EthereumMMGenTX,self).__init__(*args,**kwargs)
+		super().__init__(*args,**kwargs)
 		if hasattr(opt,'tx_gas') and opt.tx_gas:
 			self.tx_gas = self.start_gas = ETHAmt(int(opt.tx_gas),'wei')
 		if hasattr(opt,'contract_data') and opt.contract_data:
@@ -463,7 +463,7 @@ class EthereumTokenMMGenTX(EthereumMMGenTX):
 			die(1,(m1+m2).format(p=g.token,t=self.dcoin,n=capfirst(g.proto.name)))
 
 	def make_txobj(self): # called by create_raw()
-		super(EthereumTokenMMGenTX,self).make_txobj()
+		super().make_txobj()
 		t = self.token_obj
 		o = self.txobj
 		o['token_addr'] = t.addr
@@ -472,7 +472,7 @@ class EthereumTokenMMGenTX(EthereumMMGenTX):
 		o['data'] = t.create_data(o['token_to'],o['amt'])
 
 	def check_txfile_hex_data(self):
-		d = super(EthereumTokenMMGenTX,self).check_txfile_hex_data()
+		d = super().check_txfile_hex_data()
 		o = self.txobj
 
 		if self.check_sigs(): # online, from rlp and wallet
@@ -496,7 +496,7 @@ class EthereumTokenMMGenTX(EthereumMMGenTX):
 		return 'Token:     {d} {c}\n{r}'.format(
 			d=self.txobj['token_addr'].hl(),
 			c=blue('(' + g.dcoin + ')'),
-			r=super(EthereumTokenMMGenTX,self).format_view_body(*args,**kwargs))
+			r=super().format_view_body(*args,**kwargs))
 
 	def do_sign(self,wif,tx_num_str):
 		o = self.txobj

mmgen/tx.py

@@ -1507,7 +1507,7 @@ class MMGenBumpTX(MMGenTX):
 
 	def __init__(self,filename,send=False):
 
-		super(MMGenBumpTX,self).__init__(filename)
+		super().__init__(filename)
 
 		if not self.is_replaceable():
 			die(1,"Transaction '{}' is not replaceable".format(self.txid))
@@ -1563,7 +1563,7 @@ class MMGenBumpTX(MMGenTX):
 		self.update_output_amt(op_idx,self.sum_inputs()-self.sum_outputs(exclude=op_idx)-fee)
 
 	def convert_and_check_fee(self,tx_fee,desc):
-		ret = super(MMGenBumpTX,self).convert_and_check_fee(tx_fee,desc)
+		ret = super().convert_and_check_fee(tx_fee,desc)
 		if ret < self.min_fee:
 			msg('{} {c}: {} fee too small. Minimum fee: {} {c} ({} {})'.format(
 				ret,desc,self.min_fee,self.fee_abs2rel(self.min_fee.hl()),self.rel_fee_desc,c=g.coin))
@@ -1604,7 +1604,7 @@ class MMGenSplitTX(MMGenTX):
 		except:
 			ymsg('Connect to {} daemon failed.  Network fee estimation unavailable'.format(g.coin))
 			return self.get_usr_fee_interactive(opt.tx_fee,'User-selected')
-		return super(type(self),self).get_fee_from_user()
+		return super().get_fee_from_user()
 
 	def create_split(self,mmid):