#!/usr/bin/env python
# coding: utf-8

# trigger font-config errors by making `$HOME/.fontconfig` not writable

# In[1]:


get_ipython().system('ls -la $HOME')
get_ipython().system('fc-cache')


# importing weasyprint triggers font-config errors:

# In[2]:


import weasyprint


# repeated imports don't trigger module load, so no repeated output:

# In[3]:


import weasyprint


# but we can trigger fcinit again

# In[4]:


from weasyprint.text.fonts import fontconfig
fontconfig.FcInitLoadConfigAndFonts();


# (restart kernel)
# 
# using `wurlitzer.pipes()` suppresses output during import:

# In[1]:


import wurlitzer

with wurlitzer.pipes():
    import weasyprint


# (restart kernel)
# 
# importing fontconfig submodule triggers output because `import weasyprint` is implied any time a submodule is imported

# In[1]:


import sys
from weasyprint.text.fonts import fontconfig
'weasyprint' in sys.modules


# `import weasyprint` does nothing because it's already been run

# In[2]:


import weasyprint


# In[3]:


fontconfig.FcInitLoadConfigAndFonts();


# In[4]:


import wurlitzer
with wurlitzer.pipes():
    fontconfig.FcInitLoadConfigAndFonts();


# (restart kernel)
# 
# the example in https://github.com/minrk/wurlitzer/issues/92

# In[1]:


import sys
import wurlitzer
from weasyprint.text.fonts import fontconfig

sys.stderr.flush()
print("after import")

with wurlitzer.pipes():
    fontconfig.FcInitLoadConfigAndFonts();


# Running a second time produces no output, because the output was produced by the import:

# In[2]:


import sys
import wurlitzer
from weasyprint.text.fonts import fontconfig

sys.stderr.flush()
print("after import")

with wurlitzer.pipes():
    fontconfig.FcInitLoadConfigAndFonts();


# (restart kernel)
# 
# same example, also capturing output for the import:

# In[1]:


import wurlitzer
with wurlitzer.pipes():
    from weasyprint.text.fonts import fontconfig

with wurlitzer.pipes():
    fontconfig.FcInitLoadConfigAndFonts();