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CSVexporter fails when a legend is added to the plotWidget

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0

I'm creating a charter using pyqtgraph. To export the data, I'm using pyqtgraph's built-in CSVExporter() to export csv files. However, I also tried to add a legend, it fails.

Interestingly enough, the legend can exist on its own, and everything works fine. From my understanding, the legend actually starts being filled in with the names of the curves when you add the name parameter when instantiating each PlotItem. This is when the exporter fails.

I have a running list of PlotItem objects and instantiate them as so:

plot = self.plotWidget.plot(self.data[i], pen=(i, self.data.size), name=i) 
self.traces.append(plot)

I get the following error only when the legend has data filled in. That is, only when it displays something like

"curve 1"
"curve 2"

File "app.py", line 335, in saveData
 exporter.export(fileName='data.csv')
File "/Users/sammyalhashemi/Documents/Charter/python-gui/venv/lib/python3.6/site-packages/pyqtgraph/exporters/CSVExporter.py", line 44, in export
name = c.name().replace('"', '""') + '_'
AttributeError: 'int' object has no attribute 'replace'

python pyqt pyqt5 pyqtgraph

share|improve this question

edited Mar 22 at 18:30

eyllanesc

90.2k123565

asked Mar 22 at 18:09

StarLlamaStarLlama

206

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  provider a Minimal, Complete, and Verifiable example
  
  – eyllanesc
  Mar 22 at 18:31
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Okay, I actually figured it out. It occurs because when instantiating a PlotItem, for example when you call plotWidget.plot(data, pen, name), there is no check that the name parameter must be a string. As a test, I was plugging in ints, and thus the exporter was looking at integer names, and hence the above error. I think this an extra check should be added to pyqtgraph, or at least make it more clear in the docs.
  
  – StarLlama
  Mar 23 at 0:00
  

  
  
  
  

add a comment | 

0

I'm creating a charter using pyqtgraph. To export the data, I'm using pyqtgraph's built-in CSVExporter() to export csv files. However, I also tried to add a legend, it fails.

Interestingly enough, the legend can exist on its own, and everything works fine. From my understanding, the legend actually starts being filled in with the names of the curves when you add the name parameter when instantiating each PlotItem. This is when the exporter fails.

I have a running list of PlotItem objects and instantiate them as so:

plot = self.plotWidget.plot(self.data[i], pen=(i, self.data.size), name=i) 
self.traces.append(plot)

I get the following error only when the legend has data filled in. That is, only when it displays something like

"curve 1"
"curve 2"

File "app.py", line 335, in saveData
 exporter.export(fileName='data.csv')
File "/Users/sammyalhashemi/Documents/Charter/python-gui/venv/lib/python3.6/site-packages/pyqtgraph/exporters/CSVExporter.py", line 44, in export
name = c.name().replace('"', '""') + '_'
AttributeError: 'int' object has no attribute 'replace'

python pyqt pyqt5 pyqtgraph

share|improve this question

edited Mar 22 at 18:30

eyllanesc

90.2k123565

asked Mar 22 at 18:09

StarLlamaStarLlama

206

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  provider a Minimal, Complete, and Verifiable example
  
  – eyllanesc
  Mar 22 at 18:31
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Okay, I actually figured it out. It occurs because when instantiating a PlotItem, for example when you call plotWidget.plot(data, pen, name), there is no check that the name parameter must be a string. As a test, I was plugging in ints, and thus the exporter was looking at integer names, and hence the above error. I think this an extra check should be added to pyqtgraph, or at least make it more clear in the docs.
  
  – StarLlama
  Mar 23 at 0:00
  

  
  
  
  

add a comment | 

I'm creating a charter using pyqtgraph. To export the data, I'm using pyqtgraph's built-in CSVExporter() to export csv files. However, I also tried to add a legend, it fails.

Interestingly enough, the legend can exist on its own, and everything works fine. From my understanding, the legend actually starts being filled in with the names of the curves when you add the name parameter when instantiating each PlotItem. This is when the exporter fails.

I have a running list of PlotItem objects and instantiate them as so:

plot = self.plotWidget.plot(self.data[i], pen=(i, self.data.size), name=i) 
self.traces.append(plot)

I get the following error only when the legend has data filled in. That is, only when it displays something like

"curve 1"
"curve 2"

File "app.py", line 335, in saveData
 exporter.export(fileName='data.csv')
File "/Users/sammyalhashemi/Documents/Charter/python-gui/venv/lib/python3.6/site-packages/pyqtgraph/exporters/CSVExporter.py", line 44, in export
name = c.name().replace('"', '""') + '_'
AttributeError: 'int' object has no attribute 'replace'

python pyqt pyqt5 pyqtgraph

share|improve this question

edited Mar 22 at 18:30

eyllanesc

90.2k123565

asked Mar 22 at 18:09

StarLlamaStarLlama

206

plot = self.plotWidget.plot(self.data[i], pen=(i, self.data.size), name=i) 
self.traces.append(plot)

File "app.py", line 335, in saveData
 exporter.export(fileName='data.csv')
File "/Users/sammyalhashemi/Documents/Charter/python-gui/venv/lib/python3.6/site-packages/pyqtgraph/exporters/CSVExporter.py", line 44, in export
name = c.name().replace('"', '""') + '_'
AttributeError: 'int' object has no attribute 'replace'

share|improve this question

edited Mar 22 at 18:30

eyllanesc

90.2k123565

asked Mar 22 at 18:09

StarLlamaStarLlama

206

share|improve this question

edited Mar 22 at 18:30

eyllanesc

90.2k123565

asked Mar 22 at 18:09

StarLlamaStarLlama

206

edited Mar 22 at 18:30

eyllanesc

90.2k123565

edited Mar 22 at 18:30

eyllanesc

90.2k123565

asked Mar 22 at 18:09

StarLlamaStarLlama

206

asked Mar 22 at 18:09

StarLlamaStarLlama

206