REFACTOR: Syncronized changes with the praatio library

Optional textgrid functionality requires praatio 2.1.0 or
greater.

pysle/praattools.py

@@ -11,7 +11,7 @@ class OptionalFeatureError(ImportError):
         return "ERROR: You must have praatio installed to use pysle.praatTools"
 
 try:
-    import praatio
+    from praatio import tgio
 except ImportError:
     raise OptionalFeatureError()
 
@@ -97,10 +97,10 @@ def syllabifyTextgrid(isleDict, tg, wordTierName, phoneTierName,
             tonicEntryList.append((syllableStart, syllableEnd, tonicLabel))
     
     # Create a textgrid with the two syllable-level tiers
-    syllableTier = praatio.IntervalTier("syllable", syllableEntryList)
-    tonicTier = praatio.IntervalTier('tonic', tonicEntryList)
+    syllableTier = tgio.IntervalTier("syllable", syllableEntryList)
+    tonicTier = tgio.IntervalTier('tonic', tonicEntryList)
     
-    syllableTG = praatio.Textgrid()
+    syllableTG = tgio.Textgrid()
     syllableTG.addTier(syllableTier)
     syllableTG.addTier(tonicTier)
 

test/syllabifyTextgrid.py

@@ -12,14 +12,14 @@ This snippet shows you how to use this function.
 
 from os.path import join
 
-import praatio
+from praatio import tgio
 from pysle import isletool
 from pysle import praattools
 
 path = join('.', 'files')
 path = "/Users/tmahrt/Dropbox/workspace/pysle/test/files"
 
-tg = praatio.openTextGrid(join(path, "pumpkins.TextGrid"))
+tg = tgio.openTextGrid(join(path, "pumpkins.TextGrid"))
 
 # Needs the full path to the file
 islevPath = '/Users/tmahrt/Dropbox/workspace/pysle/test/islev2.txt'