Update mychain.py

mychain.py

@@ -168,7 +168,7 @@ class MyChainRec:
         self.chain = []
         self.pending_transactions = []
         self.create_block(proof=1, previous_hash='0',chain_n=create)
-    def create_block(self, balance, proof, previous_hash, prev_block=prev_block,chain_r=None,chain_n=None):
+    def create_block(self, balance, proof, previous_hash, prev_block,chain_r=None,chain_n=None):
         if chain_r=="" or chain_r==None:
             chain_r=f"{main_chain_rec.split('datasets/',1)[1].split('/raw',1)[0]}"
         if chain_n !="" and chain_n !=None: