multindex indicator support

README.md

@@ -44,6 +44,8 @@ ohlcv_complex_df.lw.plot() #df containing ohlcv and other columns
 ```
 ![alt text](image-5.png)
 ```python
+t1data.ohlcv.data["BAC"].lw.plot(left=[(t1mom,"mom"),(t1mom_tt.mom.loc[:, (20,"1T")],),(t1mom_tt.mom.loc[:, (20,"5T")],)]) #display ohlcv 1m data along with 1min momentum ind and 2 multiindexed indicators on 1M and 5m resolution on 5M (calculated as multiindex)
+
 #quick few liner, displays close series with label "close" on right pricescale and rsi on left price scale, all on single Panel
 pane1 = Panel(
     right=[(close, "close")],

lightweight_charts/helpers.py

@@ -430,7 +430,7 @@ def chart(panes: list[Panel], sync=False, title='', size="m", xloc=None, session
                                     tmp.set(output_series)
                             else:
                                 if name is None:
-                                      name = "no_name"
+                                      name = "no_name" if not hasattr(series, 'name') or series.name is None else str(series.name)
 
                                 tmp = active_chart.create_line(name=name, priceScaleId=att_name)#, color="blue")
                                 tmp.set(xloc_me(series, xloc))

setup.py

@@ -5,7 +5,7 @@ with open('README.md', 'r', encoding='utf-8') as f:
 
 setup(
     name='lightweight_charts',
-    version='2.2.1',
+    version='2.2.2',
     packages=find_packages(),
     python_requires='>=3.8',
     install_requires=[