1 files changed, 55 insertions, 0 deletions
diff --git a/pysupport.py b/pysupport.py
new file mode 100644
index 0000000..4666f4b
--- /dev/null
+++ b/pysupport.py
@@ -0,0 +1,55 @@
+import os
+from ConfigParser import SafeConfigParser
+
+config = SafeConfigParser()
+config.readfp(file('/usr/share/python/debian_defaults'))
+versions = config.get('DEFAULT', 'supported-versions')
+py_supported = [s.strip() for s in versions.split(',')]
+versions = config.get('DEFAULT', 'old-versions')
+py_oldversions = [s.strip() for s in versions.split(',')]
+
+py_installed = [ ver for ver in py_supported if os.access('/usr/bin/'+ver,os.X_OK) ]
+py_supported_short = [ a.replace("python","") for a in py_supported ]
+
+def version_cmp(ver1,ver2):
+  v1=[int(i) for i in ver1.split('.')]
+  v2=[int(i) for i in ver2.split('.')]
+  return cmp(v1,v2)
+
+# Parse the version format from .version files
+class version_list(list):
+  def __init__(self,version_info):
+    self.verlist=[]
+    dummylist=[]
+    for item in version_info.rstrip('\n').split(','):
+      v=[i.strip() for i in item.split('-')]
+      if len(v)>1:
+        if v[0]:
+          dummylist.append(v[0])
+        else:
+          v[0] = py_supported_short[0]
+          dummylist.append("0")
+        if v[1]:
+          dummylist.append(v[1])
+        else:
+          v[1] = py_supported_short[-1]
+          dummylist.append("100")
+        for ver in py_supported_short:
+          try:
+            if version_cmp(ver,v[0]) >= 0 and version_cmp(ver,v[1]) <= 0:
+              self.verlist.append(ver)
+          except ValueError:
+            pass
+      else:
+        dummylist.append(v[0])
+        if v[0] in py_supported_short:
+          self.verlist.append(v[0])
+    self.verlist.sort(version_cmp)
+    dummylist.sort(version_cmp)
+    self.min=dummylist[0]
+    if self.min=="0": self.min=None
+    self.max=dummylist[-1]
+    if self.max=="100": self.max=None
+    for i in self.verlist:
+        self.append('python'+i)
+