Adding a file to an already created Archive throws error

Question

Hello Experts,
In one of the WLST python scripts, we had a piece of code which was adding a file to an already created archive. Below is the code snippet:
import zipfile
try:
conn='1.properties'
fileName='/home/pbnagara/temp/Zip1.par'
myZip = zipfile.ZipFile(fileName, mode='a')
myZip.write(conn)
myZip.close()
except Exception:
print 'Exception occurred while writing to Zip file: ' + fileName
--> it makes use of the standard python module [zipfile] to add a file to the archive.
This code has started failing [for some strange unknown reason] when we upgraded.
The same script works fine in a standalone mode[using the system's default python packages] but fails only when run within WLST.
Does WLST package a different set of zipfile libraries? Can anyone point out what might be going wrong here?

Answer 1

I did get a reply from someone on the jfreechart forum, but need to ask more questions. This was his reply:
Hi Allyson,
You are trying to add a (subclass of) JFrame to a JPanel...that won't work, of course, and Java tells you so.
You need to create a ChartPanel to display your chart. This is a subclass of JComponent, which you can happily add to a JPanel (or any other container).
Regards,
Dave Gilbert
Here is the code for the method:
private void LineChartFrame() {
double[][] data = new double[][] {
{ 1.0, 4.0, 3.0, 5.0, 5.0, 7.0, 7.0, 8.0 },
{ 5.0, 7.0, 6.0, 8.0, 4.0, 4.0, 2.0, 1.0 },
{ 4.0, 3.0, 2.0, 3.0, 6.0, 3.0, 4.0, 3.0 }
DefaultCategoryDataset dataset = new DefaultCategoryDataset(data);
// set the series names...
String[] seriesNames = new String[] { "First", "Second", "Third" };
dataset.setSeriesNames(seriesNames);
// set the category names...
String[] categories = new String[] { "Type 1", "Type 2", "Type 3", "Type 4", "Type 5", "Type 6", "Type 7", "Type 8" };
dataset.setCategories(categories);
// create the chart...
chart = ChartFactory.createLineChart(
"Line Chart Demo 1", // chart title
"Category", // domain axis label
"Value", // range axis label
dataset, // data
true, // include legend
true, // tooltips
false); // urls
chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}And I tried this to add it to my panel:
jPanel1.add(chartPanel, null);But I get this error:
java.lang.NullPointerException
ChartPanel is defined globally in this file.
jPanel1 is my main panel that I want to add the chart to.
I am putting my last duke dollar on this in the hopes that someone can help. Thanks.
Allyson