mission step priorities, fixed the store again

nullptr/models/marketplace.py

@@ -16,6 +16,9 @@ class MarketEntry:
   activity: int
   history: List[Tuple[int, int, int, int, int, int]] = []
   
+  def f(self, detail=1):
+    return f'b: {self.buy} s:{self.sell} hist: {len(self.history)}'
+    
   def add(self, buy, sell, volume, supply, activity):
     self.buy = buy
     self.sell = sell

nullptr/models/ship.py

@@ -26,6 +26,9 @@ class Ship(Base):
     self._log_level = 5
   
   def log(self, m, l=3):
+    if m is None: return
+    if type(m) != str:
+      m = pretty(m)
     if self._log_file is None:
       fn = os.path.join(self.store.data_dir, f'{self.symbol}.{self.ext()}.log')
       self._log_file = open(fn, 'a')