implemented number attribute definition

openpype/pipeline/lib/attribute_definitions.py

@@ -24,6 +24,61 @@ class AbtractAttrDef:
         pass
 
 
+class NumberDef(AbtractAttrDef):
+    """Number definition.
+
+    Number can have defined minimum/maximum value and decimal points. Value
+    is integer if decimals are 0.
+
+    Args:
+        minimum(int, float): Minimum possible value.
+        maximum(int, float): Maximum possible value.
+        decimals(int): Maximum decimal points of value.
+        default(int, float): Default value for conversion.
+    """
+
+    def __init__(
+        self, minimum=None, maximum=None, decimals=None, default=None
+    ):
+        minimum = 0 if minimum is None else minimum
+        maximum = 999999 if maximum is None else maximum
+        # Swap min/max when are passed in opposited order
+        if minimum > maximum:
+            maximum, minimum = minimum, maximum
+
+        if default is None:
+            default = 0
+
+        elif not isinstance(default, (int, float)):
+            raise TypeError((
+                "'default' argument must be 'int' or 'float', not '{}'"
+            ).format(type(default)))
+
+        # Fix default value by mim/max values
+        if default < minimum:
+            default = minimum
+
+        elif default > maximum:
+            default = maximum
+
+        self.minimum = minimum
+        self.maximum = maximum
+        self.default = default
+        self.decimals = 0 if decimals is None else decimals
+
+    def convert_value(self, value):
+        if isinstance(value, six.string_types):
+            try:
+                value = float(value)
+            except Exception:
+                pass
+
+        if not isinstance(value, (int, float)):
+            return self.default
+
+        if self.decimals == 0:
+            return int(value)
+        return round(float(value), self.decimals)
 class BoolDef(AbtractAttrDef):
     """Boolean representation.