(My appologies if this has been discussed earlier; my Google-fu may be
weak.)
pywin32's win32com/__init__.py does this (slightly compacted for
brevity):
def SetupEnvironment():
try:
keyName = "SOFTWARE\\Python\\PythonCore\\%s\\PythonPath\\win32com" %
sys.winver
key = win32api.RegOpenKey(HKEY_LOCAL_MACHINE , keyName, 0,
KEY_QUERY_VALUE)
except (win32api.error, AttributeError):
key = None
try:
found = 0
if key is not None:
try:
__path__.append(win32api.RegQueryValue(key, "Extensions" ))
found = 1
except win32api.error:
pass
if not found:
try:
__path__.append( win32api.GetFullPathName(__path__[0] + "\\.\
.\\win32comext") )
except win32api.error:
pass
if not sys.frozen:
SetupEnvironment()
Being a developer of a commercial Python application, I have beef with
this:
I would much prefer this code to work in the opposite fashion: first
look at the place relative to __path__, then fallback to registry
lookup. My reason is of course, that I have no wish to install a
"standalone" python on the user's box, nor do I want to be tripped by
the presence of one. E.g.:
cand_extdir = os.path.join(os.path.dirname(__path__[0]), 'win32comext')
if not os.path.exists(cand_extdir):
keyName = "SOFTWARE\\Python\\PythonCore\\%s\\PythonPath\\win32com" % \
sys.winver
key = win32api.RegOpenKey(HKEY_LOCAL_MACHINE , keyName, 0,
KEY_QUERY_VALUE)
try:
cand_extdir = win32api.RegQueryValue(key, "Extensions" )
except win32api.error:
cand_extdir = None
if cand_extdir:
__path__.append(cand_extdir)
The above disregards that SetupEnvironment code is not executed at all
in a frozen state, but I don't have a problem with explicitly calling
a method to get this inited; e.g:
if getattr(sys, 'frozen', False):
win32com.SetupEnvironment()
--
Anders Qvist, Open End AB
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