new register objects

state slices are now registers
def __get__(int)
def by_name(str)

✌️

environments/logging/monitor.py

@@ -104,6 +104,9 @@ class MonitorCallback(BaseCallback):
                         df = pd.DataFrame(columns=monitor.columns)
                     for _, row in monitor.iterrows():
                         df.loc[df.shape[0]] = row
+                if df is None:  # The env exited premature, we catch it.
+                    self.closed = True
+                    return
                 for column in list(df.columns):
                     if column != 'episode':
                         df[f'{column}_roll'] = df[column].rolling(window=50).mean()

environments/logging/plotting.py

@@ -20,13 +20,13 @@ PALETTE = 10 * (
 )
 
 
-def plot(filepath, ext='png', tag='monitor', **kwargs):
+def plot(filepath, ext='png', **kwargs):
     plt.rcParams.update(kwargs)
 
     plt.tight_layout()
     figure = plt.gcf()
     plt.show()
-    figure.savefig(str(filepath.parent / f'{filepath.stem}_{tag}_measures.{ext}'), format=ext)
+    figure.savefig(str(filepath), format=ext)
 
 
 def prepare_plot(filepath, results_df, ext='png', tag=''):