add textgen interface

textgen.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+
+from rich.traceback import install
+install()
+
+from abc import ABC, abstractmethod
+
+# In Python it is generally not needed to use abstract classes, but I wanted to do it safely
+
+class textgen(ABC):
+    @abstractmethod
+    def init(self, filename):
+        """
+        filename - The file (same directory as textgen.py) that contains the training text
+        """
+        raise NotImplementedError("Can't use abstract class")
+
+    @abstractmethod
+    def load(self):
+        """
+        Load the trained markov chain from a precomputed file
+        """
+        raise NotImplementedError("Can't use abstract class")
+
+    @abstractmethod
+    def train(self):
+        """
+        Generate the markov chain, uses prefix length defined in init()
+        """
+        raise NotImplementedError("Can't use abstract class")
+
+    @abstractmethod
+    def generate_sentence(self):
+        """
+        Generate a series of words/characters until a . is generated
+        """
+        raise NotImplementedError("Can't use abstract class")
+
+    @abstractmethod
+    def complete_sentence(self, prefix):
+        """
+        Generate the rest of a sentence for a given beginning
+        """
+        raise NotImplementedError("Can't use abstract class")