Remove title from ScatterChart - python-3.x

Question

I would like to know how to be able to assign a name just to a serie of data (using a scatterchart), without getting the same serie's name as title of the chart. I would like to get just the series name as legend and NOT chart title at all.
I realized that autoTitleDeleted needs to have a value of 1.
So, consulting documentation I found that ´chartContainer´ is the class to implement the aforementioned option. Therefore, I import the class and apply it as next:
from openpyxl import Workbook
from openpyxl.chart import (
ScatterChart,
Reference,
Series,
)
from openpyxl.chart.chartspace import ChartContainer
wb = Workbook()
ws = wb.active
rows = [
["Size", "Batch 1", "Batch 2"],
[2, 40, 30],
[3, 40, 25],
[4, 50, 30],
[5, 30, 25],
[6, 25, 35],
[7, 20, 40],
]
for row in rows:
ws.append(row)
chart2 = ScatterChart()
chart2.x_axis.title = "Size"
chart2.y_axis.title = "Percentage"
xvalues = Reference(ws, min_col = 1, min_row = 2, max_row = 7)
values = Reference(ws, min_col = 3, min_row = 1, max_row = 7)
series1 = Series(values, xvalues)
chart2.series.append(series1)
chart2 = ChartContainer(autoTitleDeleted = 1)
ws.add_chart(chart2, "J10")
wb.save("Ex1.xlsx")
However, next error comes up:
`runfile('C:/Users/Administrador/Desktop/Pre-Try/Ex1/Ex1.py', wdir='C:/Users/Administrador/Desktop/Pre-Try/Ex1')
Traceback (most recent call last):
File "", line 1, in
runfile('C:/Users/Administrador/Desktop/Pre-Try/Ex1/Ex1.py', wdir='C:/Users/Administrador/Desktop/Pre-Try/Ex1')
File "C:\ProgramData\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 827, in runfile
execfile(filename, namespace)
File "C:\ProgramData\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 110, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)
File "C:/Users/Administrador/Desktop/Pre-Try/Ex1/Ex1.py", line 46, in
wb.save("Ex1.xlsx")
File "C:\ProgramData\Anaconda3\lib\site-packages\openpyxl\workbook\workbook.py", line 397, in save
save_workbook(self, filename)
File "C:\ProgramData\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 294, in save_workbook
writer.save()
File "C:\ProgramData\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 276, in save
self.write_data()
File "C:\ProgramData\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 76, in write_data
self._write_worksheets()
File "C:\ProgramData\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 219, in _write_worksheets
self._write_drawing(ws._drawing)
File "C:\ProgramData\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 142, in _write_drawing
self._archive.writestr(drawing.path[1:], tostring(drawing._write()))
File "C:\ProgramData\Anaconda3\lib\site-packages\openpyxl\drawing\spreadsheet_drawing.py", line 296, in _write
self._rels.append(rel)
UnboundLocalError: local variable 'rel' referenced before assignment`
I do not really understand this error. If you could help would be grateful!

Answer 1

chart2 = ChartContainer(autoTitleDeleted = 1)
This the problem: you must use openpyxl chart objects so that the library can manage the plumbing between objects: charts are very complicated objects and we try and hide some of the complexity Your idea is correct - to set the value to True – but that won't work like this because a ChartContainer doesn't know how to add itself to the XLSX package.
As a workaround it's probably easiest create a title with an empty string. Otherwise you could submit a PR that allows the mapping of the autoTitleDeleted attribute from chartContainers to charts and vice versa.