restructure to allow easy adding of generators

python/quick_der/generators/__init__.py

@@ -0,0 +1,36 @@
+import os.path
+
+
+class QuickDERgeneric(object):
+    def __init__(self, outfn, outext):
+        self.unit, curext = os.path.splitext(outfn)
+        if curext == '.h':
+            raise Exception('File cannot overwrite itself -- use another extension than ' + outext + ' for input files')
+        self.outfile = open(self.unit + outext, 'w')
+
+        self.comma1 = None
+        self.comma0 = None
+
+    def write(self, txt):
+        self.outfile.write(txt)
+
+    def writeln(self, txt=''):
+        self.outfile.write(txt + '\n')
+
+    def newcomma(self, comma, firstcomma=''):
+        self.comma0 = firstcomma
+        self.comma1 = comma
+
+    def comma(self):
+        self.write(self.comma0)
+        self.comma0 = self.comma1
+
+    def getcomma(self):
+        return self.comma1, self.comma0
+
+    def setcomma(self, comma1, comma0):
+        self.comma1 = comma1
+        self.comma0 = comma0
+
+    def close(self):
+        self.outfile.close()

python/quick_der/generators/__init__.pyi

@@ -0,0 +1,18 @@
+# Stubs for quick_der.generators (Python 3.6)
+#
+# NOTE: This dynamically typed stub was automatically generated by stubgen.
+
+from typing import Any
+
+class QuickDERgeneric:
+    outfile: Any = ...
+    comma1: Any = ...
+    comma0: Any = ...
+    def __init__(self, outfn, outext) -> None: ...
+    def write(self, txt): ...
+    def writeln(self, txt: str = ...): ...
+    def newcomma(self, comma, firstcomma: str = ...): ...
+    def comma(self): ...
+    def getcomma(self): ...
+    def setcomma(self, comma1, comma0): ...
+    def close(self): ...