Use context manager to stop warnings not is_copy

df.is_copy was deprecated.

plotnine/coords/coord.py

@@ -204,7 +204,6 @@ def munch_data(data, dist):
         len(data)-1])
 
     munched = data.loc[idx, data.columns.difference(['x', 'y'])]
-    munched.is_copy = None
     munched['x'] = x
     munched['y'] = y
     munched.reset_index(drop=True, inplace=True)

plotnine/geoms/geom.py

@@ -219,7 +219,6 @@ def draw_layer(self, data, layout, coord, **params):
         for pid, pdata in data.groupby('PANEL'):
             if len(pdata) == 0:
                 continue
-            pdata.is_copy = None
             ploc = pid - 1
             panel_params = layout.panel_params[ploc]
             ax = layout.axs[ploc]
@@ -258,7 +257,6 @@ def draw_panel(self, data, panel_params, coord, ax, **params):
         """
         for _, gdata in data.groupby('group'):
             gdata.reset_index(inplace=True, drop=True)
-            gdata.is_copy = None
             self.draw_group(gdata, panel_params, coord, ax, **params)
 
     @staticmethod

plotnine/geoms/geom_abline.py

@@ -62,6 +62,5 @@ def draw_panel(self, data, panel_params, coord, ax, **params):
 
         for _, gdata in data.groupby('group'):
             gdata.reset_index(inplace=True)
-            gdata.is_copy = None
             geom_segment.draw_group(gdata, panel_params,
                                     coord, ax, **params)

plotnine/geoms/geom_dotplot.py

@@ -92,7 +92,6 @@ def stackdots(a):
                for j in range(int(c))]
         data = data.iloc[idx]
         data.reset_index(inplace=True, drop=True)
-        data.is_copy = None
         # Next part will set the position of each dot within each stack
         # If stackgroups=TRUE, split only on x (or y) and panel;
         # if not stacking, also split by group

plotnine/geoms/geom_hline.py

@@ -51,6 +51,5 @@ def draw_panel(self, data, panel_params, coord, ax, **params):
 
         for _, gdata in data.groupby('group'):
             gdata.reset_index(inplace=True)
-            gdata.is_copy = None
             geom_segment.draw_group(gdata, panel_params,
                                     coord, ax, **params)

plotnine/geoms/geom_path.py

@@ -89,7 +89,6 @@ def draw_panel(self, data, panel_params, coord, ax, **params):
         c = Counter(data['group'])
         counts = np.array([c[v] for v in data['group']])
         data = data[counts >= 2]
-        data.is_copy = None
 
         if len(data) < 2:
             return
@@ -108,7 +107,6 @@ def draw_panel(self, data, panel_params, coord, ax, **params):
         else:
             for _, gdata in data.groupby('group'):
                 gdata.reset_index(inplace=True, drop=True)
-                gdata.is_copy = None
                 self.draw_group(gdata, panel_params, coord, ax, **params)
 
     @staticmethod

plotnine/geoms/geom_point.py

@@ -31,7 +31,6 @@ def draw_group(data, panel_params, coord, ax, **params):
         data = coord.transform(data, panel_params)
         units = 'shape'
         for _, udata in groupby_with_null(data, units):
-            udata.is_copy = None
             udata.reset_index(inplace=True, drop=True)
             geom_point.draw_unit(udata, panel_params, coord,
                                  ax, **params)

plotnine/geoms/geom_ribbon.py

@@ -39,7 +39,6 @@ def draw_group(data, panel_params, coord, ax, **params):
             raise PlotnineError(msg)
 
         for _, udata in groupby_with_null(data, units):
-            udata.is_copy = None
             udata.reset_index(inplace=True, drop=True)
             geom_ribbon.draw_unit(udata, panel_params, coord,
                                   ax, **params)

plotnine/geoms/geom_violin.py

@@ -53,8 +53,6 @@ def draw_panel(self, data, panel_params, coord, ax, **params):
         quantiles = params['draw_quantiles']
 
         for _, df in data.groupby('group'):
-            df.is_copy = None
-
             # Find the points for the line to go all the way around
             df['xminv'] = (df['x'] - df['violinwidth'] *
                            (df['x'] - df['xmin']))

plotnine/geoms/geom_vline.py

@@ -51,7 +51,6 @@ def draw_panel(self, data, panel_params, coord, ax, **params):
 
         for _, gdata in data.groupby('group'):
             gdata.reset_index(inplace=True)
-            gdata.is_copy = None
             geom_segment.draw_group(gdata, panel_params,
                                     coord, ax, **params)
 

plotnine/ggplot.py

@@ -181,6 +181,13 @@ def draw(self, return_ggplot=False):
         This method does not modify the original ggplot object. You can
         get the modified ggplot object with :py:`return_ggplot=True`.
         """
+        # Pandas deprecated is_copy, and when we create new dataframes
+        # from slices we do not want complaints. We always uses the
+        # new frames knowing that they are separate from the original.
+        with pd.option_context('mode.chained_assignment', None):
+            return self._draw(return_ggplot)
+
+    def _draw(self, return_ggplot=False):
         # Prevent against any modifications to the users
         # ggplot object. Do the copy here as we may/may not
         # assign a default theme

plotnine/guides/guide_legend.py

@@ -311,7 +311,6 @@ def draw(self):
             # overlay geoms
             for gl in self.glayers:
                 data = gl.data.iloc[i]
-                data.is_copy = None
                 da = gl.geom.draw_legend(data, da, gl.layer)
             drawings.append(da)
         themeable['legend_key'].append(drawings)

plotnine/positions/position_stack.py

@@ -70,8 +70,6 @@ def compute_panel(cls, data, scales, params):
         negative = data['ymax'] < 0
         neg = data.loc[negative]
         pos = data.loc[~negative]
-        neg.is_copy = None
-        pos.is_copy = None
 
         if len(neg):
             neg = cls.collide(neg, params=params)

plotnine/stats/stat.py

@@ -299,7 +299,6 @@ def compute_panel(cls, data, scales, **params):
 
         stats = []
         for _, old in data.groupby('group'):
-            old.is_copy = None
             new = cls.compute_group(old, scales, **params)
             unique = uniquecols(old)
             missing = unique.columns.difference(new.columns)

plotnine/stats/stat_bindot.py

@@ -198,7 +198,6 @@ def func(df):
                 if params['drop']:
                     data = data[data['count'] > 0]
                     data.reset_index(inplace=True, drop=True)
-                    data.is_copy = None
 
         if params['binaxis'] == 'x':
             data['x'] = data.pop('bincenter')

plotnine/stats/stat_smooth.py

@@ -142,7 +142,6 @@ def setup_data(self, data):
         """
         data = data[np.isfinite(data['x']) &
                     np.isfinite(data['y'])]
-        data.is_copy = None
         return data
 
     def setup_params(self, data):

plotnine/utils.py

@@ -610,7 +610,6 @@ def groupby_apply(df, cols, func, *args, **kwargs):
     for _, d in df.groupby(cols):
         # function fn should be free to modify dataframe d, therefore
         # do not mark d as a slice of df i.e no SettingWithCopyWarning
-        d.is_copy = None
         lst.append(func(d, *args, **kwargs))
     return pd.concat(lst, axis=axis, ignore_index=True)
 
@@ -645,7 +644,6 @@ def groupby_with_null(data, *args, **kwargs):
     # Groupby on the columns, making sure to revert back
     # to NaN/None and the correct dtype.
     for group, df in data.groupby(*args, **kwargs):
-        df.is_copy = None
         for col, (orig_idx, orig_dtype) in altered_columns.items():
             # Indices in the grouped df that need correction
             sub_idx = orig_idx.intersection(df[col].index)