provide a method to know the type name (#176)

Author: ahangsu

pyteal/ast/abi/array.py

@@ -214,6 +214,13 @@ def map(self, mapFn: Callable[[T, Expr, T], Expr]) -> Expr:
             mappedArray.load(),
         )
 
+    def __str__(self) -> str:
+        return self._valueType.__str__() + (
+            "[]"
+            if self._props.static_length is None
+            else "[{}]".format(self._props.static_length)
+        )
+
 
 Array.__module__ = "pyteal"
 

pyteal/ast/abi/tuple.py

@@ -146,6 +146,9 @@ def length(self) -> Expr:
     def __getitem__(self, index: int) -> "TupleElement":
         return TupleElement(self, index)
 
+    def __str__(self) -> str:
+        return "({})".format(",".join(map(lambda x: x.__str__(), self.valueTypes)))
+
 
 Tuple.__module__ = "pyteal"
 

pyteal/ast/abi/type.py

@@ -37,5 +37,9 @@ def encode(self) -> Expr:
     def decode(self, encoded: Expr, offset: Expr, length: Expr) -> Expr:
         pass
 
+    @abstractmethod
+    def __str__(self) -> str:
+        pass
+
 
 Type.__module__ = "pyteal"

pyteal/ast/abi/uint.py

@@ -39,6 +39,9 @@ def get(self) -> Expr:
     def set(self, value: Union[int, Expr]) -> Expr:
         pass
 
+    def __str__(self) -> str:
+        return "uint{}".format(self.bit_size)
+
 
 class Uint16(Uint):
     def __init__(