Not done: Commit seq

Author: Sweetlemon68

cyaron/sequence.py

@@ -0,0 +1,31 @@
+from .utils import *
+
+class Sequence:
+    """Class Sequence: the tool class for sequences.
+    """
+
+    def __init__(self, formula, initial_values=[]):
+        """__init__(self, formula, initial_values=[]) -> None
+            Create a sequence object.
+            int formula(int, function) -> the formula function ...
+        """
+        self.formula = formula
+        if list_like(initial_values):
+            self.values = {k: v for (k, v) in enumerate(initial_values)}
+        elif isinstance(initial_values, dict):
+            self.values = initial_values
+        else:
+            raise Exception("Initial_values must be either a list/tuple or a dict.")
+
+    def __get_one(self, i):
+        if i in self.values:
+            return self.values[i]
+
+        self.values[i] = self.formula(i, self.__get_one)
+        return self.values[i]
+
+    def get(self, left_range, right_range=None):
+        if right_range is None:
+            return self.__get_one(left_range)
+
+        return [self.__get_one(i) for i in range(left_range, right_range+1)]