Merge pull request #7 from SandeepVRao/master

Context entry and Syntax Validation

Context.sublime-menu

@@ -0,0 +1,7 @@
+[
+    {
+        "id": "yapf",
+        "caption": "PyYapf: Reformat Python",
+        "command": "yapf"
+    }
+]

PyYapf.py

@@ -250,3 +250,18 @@ def run(self, edit):
         self.view.show_at_center(region)
 
         print('PyYapf Completed')
+
+    def is_visible(self):
+        fName = self.view.file_name()
+        vSettings = self.view.settings()
+        syntaxPath = vSettings.get('syntax')
+        syntax = ""
+        ext = ""
+
+        if (fName != None): # file exists, pull syntax type from extension
+            ext = os.path.splitext(fName)[1][1:]
+        if(syntaxPath != None):
+            syntax = os.path.splitext(syntaxPath)[0].split('/')[-1].lower()
+
+        return ext == 'py' or "Python" in syntax
+