Display input for view and view collection in __repr__ even when data…

… not yet loaded (#19)

* change View repr to show specLst if no data

examples/DatetimeDemo.ipynb

@@ -622,4 +622,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
+}

lux/view/View.py

@@ -18,6 +18,8 @@ def __init__(self, specLst, mark="", title=""):
 		self.xMinMax = {}
 		self.yMinMax = {}
 	def __repr__(self):
+		if not self.data:
+			return f"<View  ({str(self.specLst)}) mark: {self.mark}, score: {self.score} >"
 		filter_spec = None
 		channels, additional_channels = [], []
 		for spec in self.specLst:
@@ -39,7 +41,7 @@ def __repr__(self):
 						channels.insert(1, [spec.channel, attribute])
 					elif spec.channel != "":
 						additional_channels.append([spec.channel, attribute])
-						
+
 		channels.extend(additional_channels)
 		str_channels = ""
 		for channel in channels:

lux/view/ViewCollection.py

@@ -57,6 +57,8 @@ def __setitem__(self, key, value):
 	def __len__(self):
 		return len(self.collection)
 	def __repr__(self):
+		if len(self.collection) == 0:
+			return str(self.inputLst)
 		x_channel = ""
 		y_channel = ""
 		largest_mark = 0
@@ -230,4 +232,4 @@ def load(self, ldf) -> ViewCollection:
 			PandasExecutor.execute(vc,ldf)
 			return vc
 		else:
-			return self
+			return self