Merge d43c56a into 02d7be4

CHANGES

@@ -4,6 +4,17 @@ Pint Changelog
 0.11 (unreleased)
 -----------------
 
+- Add full support for Decimal and Fraction at the registry level.
+  **BREAKING CHANGE**: 
+  `use_decimal` is deprecated. Use `non_int_type=Decimal` when instantiating
+  the registry.
+- Moved Pi to defintions files.
+- Use ints (not floats) a defaults at many points in the codebase as in Python 3
+  the true division is the default one.
+- **BREAKING CHANGE**:
+  Added `from_string` method to all Definitions subclasses. The value/converter
+  argument of the constructor no longer accepts an string.
+  It is unlikely that this change affects the end user.
 - Added additional NumPy function implementations (allclose, intersect1d)
   (Issue #979, Thanks Jon Thielen)
 - Allow constants in units by using a leading underscore (Issue #989, Thanks

pint/constants_en.txt

@@ -8,7 +8,7 @@
 #### MATHEMATICAL CONSTANTS ####
 # As computed by Maxima with fpprec:50
 
-#pi    = 3.1415926535897932384626433832795028841971693993751 = π  # pi
+pi    = 3.1415926535897932384626433832795028841971693993751 = π  # pi
 tansec = 4.8481368111333441675396429478852851658848753880815e-6   # tangent of 1 arc-second ~ arc_second/radian
 ln10   = 2.3025850929940456840179914546843642076011014886288      # natural logarithm of 10
 wien_x = 4.9651142317442763036987591313228939440555849867973      # solution to (x-5)*exp(x)+5 = 0 => x = W(5/exp(5))+5

pint/context.py

@@ -133,7 +133,7 @@ def from_context(cls, context, **defaults):
         return context
 
     @classmethod
-    def from_lines(cls, lines, to_base_func=None):
+    def from_lines(cls, lines, to_base_func=None, non_int_type=float):
         lines = SourceIterator(lines)
 
         lineno, header = next(lines)
@@ -186,14 +186,20 @@ def to_num(val):
                 func = _expression_to_function(eq)
 
                 if "<->" in rel:
-                    src, dst = (ParserHelper.from_string(s) for s in rel.split("<->"))
+                    src, dst = (
+                        ParserHelper.from_string(s, non_int_type)
+                        for s in rel.split("<->")
+                    )
                     if to_base_func:
                         src = to_base_func(src)
                         dst = to_base_func(dst)
                     ctx.add_transformation(src, dst, func)
                     ctx.add_transformation(dst, src, func)
                 elif "->" in rel:
-                    src, dst = (ParserHelper.from_string(s) for s in rel.split("->"))
+                    src, dst = (
+                        ParserHelper.from_string(s, non_int_type)
+                        for s in rel.split("->")
+                    )
                     if to_base_func:
                         src = to_base_func(src)
                         dst = to_base_func(dst)