insert_image will not insert png file

insert_image will not insert png file

Hi,

I am using XlsxWriter to insert_image but it appears give an error saying cannot identify image file.

I am using Python version 2.7 with django and XlsxWriter 0.9.2 and Excel version 2010.

See stackoverflow question

Here is some code that demonstrates the problem:

frontSheet.insert_image('B1', 
                        '/opt/folder/cc.png', 
                        {'x_scale': 0.5, 'y_scale': 0.5})

[jmcnamara]

Can you post the output of the following three commands run against the image file used in that example:

 ls -l cc.png 
 sum cc.png 
 file cc.png

[jmcnamara]

I suspect the image file may be empty. That would generate an error similar to what you are seeing:

$ cd xlsxwriter/examples
$ echo > logo.png 
$ python demo.py 
  Traceback (most recent call last):
  File "demo.py", line 33, in <module>
    workbook.close()
  File ".../workbook.py", line 297, in close
  File ".../workbook.py", line 593, in _store_workbook
  File ".../workbook.py", line 1018, in _prepare_drawings
  File ".../workbook.py", line 1094, in _get_image_properties
  struct.error: unpack requires a string argument of length 3

Post the output from the above commands and we’ll see.