Legend Compatibility Issue in texworld#557 (#2) [copy of nschloe#558]

* Legend Compatibility Issue in texworld#557

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* Backwards Compat for `ncol`

Co-authored-by: st-- <[email protected]>

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Co-authored-by: Paul Kim <[email protected]>

Author: st--

src/tikzplotlib/_legend.py

@@ -78,8 +78,13 @@ def draw_legend(data, obj):
     if alignment:
         data["current axes"].axis_options.append(f"legend cell align={{{alignment}}}")
 
-    if obj._ncol != 1:
-        data["current axes"].axis_options.append(f"legend columns={obj._ncol}")
+    try:
+        ncols = obj._ncols
+    except AttributeError:
+        # backwards-compatibility with matplotlib < 3.6.0
+        ncols = obj._ncol
+    if ncols != 1:
+        data["current axes"].axis_options.append(f"legend columns={ncols}")
 
     # Write styles to data
     if legend_style: