Use repr instead of string formatting to convert floats. Closes wires…

…ervice#428.

CHANGELOG.rst

@@ -1,6 +1,7 @@
 1.2.1
 -----
 
+* Removed ``float_precision`` argument from :class:`.Number`. (#428)
 * :class:`.AgateTestCase` is now available as ``agate.AgateTestCase``. (#426)
 * :meth:`.TableSet.to_json` now has an ``indent`` option for use with ``nested``.
 * :meth:`.TableSet.to_json` now has a ``nested`` option for writing a single, nested JSON file. (#417)

agate/data_types/number.py

@@ -22,17 +22,11 @@ class Number(DataType):
     :param locale:
         A locale specification such as :code:`en_US` or :code:`de_DE` to use
         for parsing formatted numbers.
-    :param float_precision:
-        An integer specifying how many decimal places to include when
-        converting Python's native floats to Decimals. Beyond this point values
-        will be rounded. This does *not* apply to string representations of
-        fractional numbers.
     """
-    def __init__(self, locale='en_US', float_precision=10, **kwargs):
+    def __init__(self, locale='en_US', **kwargs):
         super(Number, self).__init__(**kwargs)
 
         self.locale = locale
-        self.float_format = '%%.%if' % float_precision
 
     def cast(self, d):
         """
@@ -46,7 +40,7 @@ def cast(self, d):
         elif type(d) is int:
             return Decimal(d)
         elif type(d) is float:
-            return Decimal(self.float_format % d)
+            return Decimal(repr(d))
         elif isinstance(d, six.string_types):
             d = d.strip()
             d = d.strip('%')

agate/table.py

@@ -285,11 +285,11 @@ def rename(self, column_names=None, row_names=None):
 
         if isinstance(row_names, dict):
             row_names = [row_names[name] if name in row_names else name for name in self.row_names]
-        
+
         if column_names is not None and column_names != self.column_names:
             if row_names is None:
                 row_names = self._row_names
-                
+
             return Table(self.rows, column_names, self.column_types, row_names=row_names, _is_fork=False)
         else:
             return self._fork(self.rows, column_names, self._column_types, row_names=row_names)
@@ -1000,7 +1000,7 @@ def aggregate(self, aggregations):
             return tuple(results)
         else:
             aggregations.validate(self)
-            
+
             return aggregations.run(self)
 
     @allow_tableset_proxy