wx.Image constructor shows popup instead of raising an exception

Question

When I run this Python code:

import io, wx

with open("imgs/ad.png", "rb") as fid:
    img_stream = io.BytesIO(fid.read())
try:
    img = wx.Image(img_stream, type=wx.BITMAP_TYPE_PNM)
except:
    pass

it results in a message box saying "Error: This is not a PNM file." instead of raising an exception. Is it possible to have wx raise an exception instead?

Answer 1

As @Rolf-of-Saxony pointed out, the message box is due to wxPython logging. Two basic options for suppressing it are temporary creation of the wx.LogNull() object

import io
import wx

with open("imgs/Olympic_flag.svg", "rb") as fid:
    img_stream = io.BytesIO(fid.read())
noLog = wx.LogNull()
img = wx.Image(img_stream)
if img.IsOk():
    pass
else:
    pass
del noLog

or calling wx.Log.EnableLogging()

import io
import wx

wx.Log.EnableLogging(False)
img = wx.Image(img_stream)
if img.IsOk():
    pass
else:
    pass
wx.Log.EnableLogging(True)