Add float spec

configspec/specification.py

@@ -63,6 +63,24 @@ class IntSpec(_ValueSpecification):
                                      str(self.maxval))
 
 
+@preservable
+class FloatSpec(_ValueSpecification):
+    def __init__(self, minval=None, maxval=None, helptext=""):
+        super().__init__(helptext)
+        self.minval = minval
+        self.maxval = maxval
+
+    def validate(self, value):
+        if not isinstance(value, float):
+            raise InvalidConfigError("Config value must be a float")
+        if self.minval is not None and value < self.minval:
+            raise InvalidConfigError("Config value must be >= " +
+                                     str(self.minval))
+        if self.maxval is not None and value > self.maxval:
+            raise InvalidConfigError("Config value must be <= " +
+                                     str(self.maxval))
+
+
 @preservable
 class StringSpec(_ValueSpecification):
     def __init__(self, regex=None, helptext=""):

tests/test_configspec.py

@@ -12,18 +12,22 @@ def example_spec():
     confspec.add_spec("boollist_a", ListSpec(BoolSpec(), helptext="Bool List A"))
     confspec.add_spec("int_a", IntSpec(-4, 4, helptext="Int A"))
     confspec.add_spec("intlist_a", ListSpec(IntSpec(-4, 4, "Int A")))
+    confspec.add_spec("float_a", FloatSpec(-4, 4, helptext="Float A"))
+    confspec.add_spec("floatlist_a", ListSpec(FloatSpec(-4, 4, "Float A")))
     confspec.add_spec("string_a", StringSpec(helptext="String A"))
     confspec.add_spec("stringlist_a", ListSpec(StringSpec(), helptext="String List A"))
 
     confdictspec = confspec.add_spec("dict_a", DictSpec(helptext="Dict A"))
     confdictspec.add_spec("bool_b", BoolSpec(helptext="Bool B"))
     confdictspec.add_spec("int_b", IntSpec(helptext="Int B"))
+    confdictspec.add_spec("float_b", FloatSpec(helptext="Float B"))
     confdictspec.add_spec("string_b", StringSpec(helptext="String B"))
 
     confdictlist = confspec.add_spec("dictlist_a", ListSpec(
         DictSpec(), helptext="List of Dicts B"))
     confdictlist.add_specs({"bool_c": BoolSpec(helptext="Bool C"),
                             "int_c": IntSpec(helptext="Int C"),
+                            "float_c": FloatSpec(helptext="Float C"),
                             "string_c": StringSpec(helptext="String C")})
 
     return confspec
@@ -35,17 +39,22 @@ def example_values():
             'boollist_a': [False, True],
             'int_a': 1,
             'intlist_a': [1, 2, 3, 4],
+            'float_a': 1.5,
+            'floatlist_a': [1.2, 2.1, 3.7, 2.8],
             'string_a': 'sometext',
             'stringlist_a': ['somemoretext', 'yetmoretext'],
             'dict_a': {
                 'bool_b': False,
                 'int_b': 0,
+                'float_b': 0.5,
                 'string_b': 'texttesttext'},
             'dictlist_a': [{'bool_c': False,
                             'int_c': 3,
+                            'float_c': 3.4,
                             'string_c': 'string1'},
                            {'bool_c': True,
                             'int_c': 0,
+                            'float_c': 0.4,
                             'string_c': 'string2'}]}
 
     return vals