"""
If you have more than one version of wxPython installed this module
allows your application to choose which version of wxPython will be
-imported when it does 'import wx'. You use it like this::
+imported when it does 'import wx'. The main function of this module
+is `select` and you use it like this::
import wxversion
wxversion.select('2.4')
import wx
-Or additional build options can also be selected, like this::
+Or additional build options can also be selected, although they will
+not be required if they are not installed, like this::
import wxversion
wxversion.select('2.5.3-unicode')
import wx
+Or you can require an exact match on the build options like this::
+
+ import wxversion
+ wxversion.select('2.5.3-unicode', optionsRequired=True)
+ import wx
+
+Finally you can also specify a collection of versions that are allowed
+by your application, like this::
+
+ import wxversion
+ wxversion.select(['2.5.4', '2.5.5', '2.6'])
+ import wx
+
+
Of course the default wxPython version can also be controlled by
setting PYTHONPATH or by editing the wx.pth path configuration file,
but using wxversion will allow an application to manage the version
#----------------------------------------------------------------------
-def select(versions):
+def select(versions, optionsRequired=False):
"""
Search for a wxPython installation that matches version. If one
is found then sys.path is modified so that version will be
raised. This funciton should only be caled once at the begining
of the application before wxPython is imported.
- :param version: Specifies the version to look for, it can
- either be a string or a list of strings. Each
- string is compared to the installed wxPythons
- and the best match is inserted into the
- sys.path, allowing an 'import wx' to find that
- version.
-
- The version string is composed of the dotted
- version number (at least 2 of the 4 components)
- optionally followed by hyphen ('-') separated
- options (wx port, unicode/ansi, flavour, etc.) A
- match is determined by how much of the installed
- version matches what is given in the version
- parameter. If the version number components don't
- match then the score is zero, otherwise the score
- is increased for every specified optional component
- that is specified and that matches.
+ :param versions: Specifies the version to look for, it can
+ either be a string or a list of strings. Each string is
+ compared to the installed wxPythons and the best match is
+ inserted into the sys.path, allowing an 'import wx' to
+ find that version.
+
+ The version string is composed of the dotted version
+ number (at least 2 of the 4 components) optionally
+ followed by hyphen ('-') separated options (wx port,
+ unicode/ansi, flavour, etc.) A match is determined by how
+ much of the installed version matches what is given in the
+ version parameter. If the version number components don't
+ match then the score is zero, otherwise the score is
+ increased for every specified optional component that is
+ specified and that matches.
+
+ Please note, however, that it is possible for a match to
+ be selected that doesn't exactly match the versions
+ requested. The only component that is required to be
+ matched is the version number. If you need to require a
+ match on the other components as well, then please use the
+ optional ``optionsRequired`` parameter described next.
+
+ :param optionsRequired: Allows you to specify that the other
+ components of the version string (such as the port name
+ or character type) are also required to be present for an
+ installed version to be considered a match. Using this
+ parameter allows you to change the selection from a soft,
+ as close as possible match to a hard, exact match.
+
"""
if type(versions) == str:
versions = [versions]
# A version was previously selected, ensure that it matches
# this new request
for ver in versions:
- if _selected.Score(_wxPackageInfo(ver)) > 0:
+ if _selected.Score(_wxPackageInfo(ver), optionsRequired) > 0:
return
# otherwise, raise an exception
raise VersionError("A previously selected wx version does not match the new request.")
# Look for a matching version and manipulate the sys.path as
# needed to allow it to be imported.
installed = _find_installed(True)
- bestMatch = _get_best_match(installed, versions)
+ bestMatch = _get_best_match(installed, versions, optionsRequired)
if bestMatch is None:
raise VersionError("Requested version of wxPython not found")
#----------------------------------------------------------------------
-def selectNewest(minVersion):
+UPDATE_URL = "http://wxPython.org/"
+#UPDATE_URL = "http://sourceforge.net/project/showfiles.php?group_id=10718"
+
+_EM_DEBUG=0
+
+def ensureMinimal(minVersion, optionsRequired=False):
"""
- Selects a version of wxPython that has a version number greater
- than or equal to the version given. If a matching version is not
- found then instead of raising an exception like select() does this
- function will inform the user of that fact with a message dialog,
- open the system's default web browser to the wxPython download
- page, and then will exit the application.
+ Checks to see if the default version of wxPython is greater-than
+ or equal to `minVersion`. If not then it will try to find an
+ installed version that is >= minVersion. If none are available
+ then a message is displayed that will inform the user and will
+ offer to open their web browser to the wxPython downloads page,
+ and will then exit the application.
"""
assert type(minVersion) == str
# ensure that wxPython hasn't been imported yet.
if sys.modules.has_key('wx') or sys.modules.has_key('wxPython'):
- raise VersionError("wxversion.select() must be called before wxPython is imported")
-
+ raise VersionError("wxversion.ensureMinimal() must be called before wxPython is imported")
+
bestMatch = None
- installed = _find_installed(True)
minv = _wxPackageInfo(minVersion)
- if installed:
- # The list is in reverse sorted order, so if the first one is
- # big enough then choose it
- if installed[0] >= minv:
- bestMatch = installed[0]
+ # check the default version first
+ defaultPath = _find_default()
+ if defaultPath:
+ defv = _wxPackageInfo(defaultPath, True)
+ if defv >= minv and minv.CheckOptions(defv, optionsRequired):
+ bestMatch = defv
+ # if still no match then check look at all installed versions
if bestMatch is None:
+ installed = _find_installed()
+ # The list is in reverse sorted order, so find the first
+ # one that is big enough and optionally matches the
+ # options
+ for inst in installed:
+ if inst >= minv and minv.CheckOptions(inst, optionsRequired):
+ bestMatch = inst
+ break
+
+ # if still no match then prompt the user
+ if bestMatch is None:
+ if _EM_DEBUG: # We'll do it this way just for the test code below
+ raise VersionError("Requested version of wxPython not found")
+
import wx, webbrowser
versions = "\n".join([" "+ver for ver in getInstalled()])
app = wx.PySimpleApp()
- wx.MessageBox("This application requires a version of wxPython "
- "greater than or equal to %s but a matching version "
- "was not found.\n\n"
- "You currently have these version(s) installed:\n%s"
- % (minVersion, versions),
- "wxPython Upgrade Needed", style=wx.OK)
+ result = wx.MessageBox("This application requires a version of wxPython "
+ "greater than or equal to %s, but a matching version "
+ "was not found.\n\n"
+ "You currently have these version(s) installed:\n%s\n\n"
+ "Would you like to download a new version of wxPython?\n"
+ % (minVersion, versions),
+ "wxPython Upgrade Needed", style=wx.YES_NO)
+ if result == wx.YES:
+ webbrowser.open(UPDATE_URL)
app.MainLoop()
- webbrowser.open("http://sourceforge.net/project/showfiles.php?group_id=10718")
sys.exit()
sys.path.insert(0, bestMatch.pathname)
+ global _selected
_selected = bestMatch
#----------------------------------------------------------------------
-def checkInstalled(versions):
+def checkInstalled(versions, optionsRequired=False):
"""
Check if there is a version of wxPython installed that matches one
of the versions given. Returns True if so, False if not. This
can be used to determine if calling `select` will succeed or not.
- :param version: Same as in `select`, either a string or a list
- of strings specifying the version(s) to check
- for.
+ :param versions: Same as in `select`, either a string or a list
+ of strings specifying the version(s) to check for.
+
+ :param optionsRequired: Same as in `select`.
"""
if type(versions) == str:
versions = [versions]
installed = _find_installed()
- bestMatch = _get_best_match(installed, versions)
+ bestMatch = _get_best_match(installed, versions, optionsRequired)
return bestMatch is not None
#----------------------------------------------------------------------
#----------------------------------------------------------------------
# private helpers...
-def _get_best_match(installed, versions):
+def _get_best_match(installed, versions, optionsRequired):
bestMatch = None
bestScore = 0
for pkg in installed:
for ver in versions:
- score = pkg.Score(_wxPackageInfo(ver))
+ score = pkg.Score(_wxPackageInfo(ver), optionsRequired)
if score > bestScore:
bestMatch = pkg
bestScore = score
return installed
+# Scan the sys.path looking for either a directory matching _pattern,
+# or a wx.pth file
+def _find_default():
+ for pth in sys.path:
+ # empty means to look in the current dir
+ if not pth:
+ pth = '.'
+
+ # skip it if it's not a package dir
+ if not os.path.isdir(pth):
+ continue
+
+ # does it match the pattern?
+ base = os.path.basename(pth)
+ if fnmatch.fnmatchcase(base, _pattern):
+ return pth
+
+ for pth in sys.path:
+ if not pth:
+ pth = '.'
+ if not os.path.isdir(pth):
+ continue
+ if os.path.exists(os.path.join(pth, 'wx.pth')):
+ base = open(os.path.join(pth, 'wx.pth')).read()
+ return os.path.join(pth, base)
+
+ return None
+
+
class _wxPackageInfo(object):
def __init__(self, pathname, stripFirst=False):
self.pathname = pathname
self.options = segments[1:]
- def Score(self, other):
+ def Score(self, other, optionsRequired):
score = 0
# whatever number of version components given in other must
if self.version[:minlen] != other.version[:minlen]:
return 0
score += 1
-
+
+ # check for matching options, if optionsRequired then the
+ # options are not optional ;-)
for opt in other.options:
if opt in self.options:
score += 1
+ elif optionsRequired:
+ return 0
+
return score
-
+
+ def CheckOptions(self, other, optionsRequired):
+ # if options are not required then this always succeeds
+ if not optionsRequired:
+ return True
+ # otherwise, if we have any option not present in other, then
+ # the match fails.
+ for opt in self.options:
+ if opt not in other.options:
+ return False
+ return True
+
+
def __lt__(self, other):
return self.version < other.version or \
if __name__ == '__main__':
import pprint
-
- #selectNewest('2.5')
- #print sys.path[0]
+
+ #ensureMinimal('2.5')
+ #pprint.pprint(sys.path)
#sys.exit()
- def test(version):
+ def test(version, optionsRequired=False):
# setup
savepath = sys.path[:]
#test
- select(version)
- print "Asked for %s:\t got: %s" % (version, sys.path[0])
- #pprint.pprint(sys.path)
- #print
+ select(version, optionsRequired)
+ print "Asked for %s, (%s):\t got: %s" % (version, optionsRequired, sys.path[0])
+
+ # reset
+ sys.path = savepath[:]
+ global _selected
+ _selected = None
+
+
+ def testEM(version, optionsRequired=False):
+ # setup
+ savepath = sys.path[:]
+
+ #test
+ ensureMinimal(version, optionsRequired)
+ print "EM: Asked for %s, (%s):\t got: %s" % (version, optionsRequired, sys.path[0])
# reset
sys.path = savepath[:]
# make some test dirs
- names = ['wx-2.4',
- 'wx-2.5.2',
- 'wx-2.5.2.9-gtk2-unicode',
- 'wx-2.5.2.9-gtk-ansi',
- 'wx-2.5.1',
- 'wx-2.5.2.8-gtk2-unicode',
- 'wx-2.5.3']
+ names = ['wx-2.4-gtk-ansi',
+ 'wx-2.5.2-gtk2-unicode',
+ 'wx-2.5.3-gtk-ansi',
+ 'wx-2.6-gtk2-unicode',
+ 'wx-2.6-gtk2-ansi',
+ 'wx-2.6-gtk-ansi',
+ 'wx-2.7.1-gtk2-ansi',
+ ]
for name in names:
d = os.path.join('/tmp', name)
os.mkdir(d)
print checkInstalled("2.4")
print checkInstalled("2.5-unicode")
print checkInstalled("2.99-bogus")
+ print "Current sys.path:"
+ pprint.pprint(sys.path)
+ print
+
test("2.4")
test("2.5")
test("2.5-gtk2")
test("2.5.2")
test("2.5-ansi")
test("2.5-unicode")
+ test("2.6")
+ test("2.6-ansi")
+ test(["2.6-unicode", "2.7-unicode"])
+ test(["2.6", "2.7"])
+ test(["2.6-unicode", "2.7-unicode"], optionsRequired=True)
+
+
# There isn't a unicode match for this one, but it will give the best
# available 2.4. Should it give an error instead? I don't think so...
test("2.4-unicode")
# Try asking for multiple versions
- test(["2.6", "2.5.3", "2.5.2-gtk2"])
+ test(["2.5.2", "2.5.3", "2.6"])
try:
# expecting an error on this one
- test("2.6")
+ test("2.9")
except VersionError, e:
- print "Asked for 2.6:\t got Exception:", e
+ print "Asked for 2.9:\t got Exception:", e
# check for exception when incompatible versions are requested
try:
except VersionError, e:
print "Asked for incompatible versions, got Exception:", e
+ _EM_DEBUG=1
+ testEM("2.6")
+ testEM("2.6-unicode")
+ testEM("2.6-unicode", True)
+ try:
+ testEM("2.9")
+ except VersionError, e:
+ print "EM: Asked for 2.9:\t got Exception:", e
+
# cleanup
for name in names:
d = os.path.join('/tmp', name)
projects / wxWidgets.git / blobdiff