diff options
Diffstat (limited to 'Lib/decimal.py')
| -rw-r--r-- | Lib/decimal.py | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/Lib/decimal.py b/Lib/decimal.py index 8b54821..7e24516 100644 --- a/Lib/decimal.py +++ b/Lib/decimal.py @@ -523,6 +523,8 @@ class Decimal(object): Decimal("314") >>> Decimal(Decimal(314)) # another decimal instance Decimal("314") + >>> Decimal(' 3.14 \\n') # leading and trailing whitespace okay + Decimal("3.14") """ # Note that the coefficient, self._int, is actually stored as @@ -538,7 +540,7 @@ class Decimal(object): # From a string # REs insist on real strings, so we can too. if isinstance(value, basestring): - m = _parser(value) + m = _parser(value.strip()) if m is None: if context is None: context = getcontext() @@ -3533,7 +3535,16 @@ class Context(object): return rounding def create_decimal(self, num='0'): - """Creates a new Decimal instance but using self as context.""" + """Creates a new Decimal instance but using self as context. + + This method implements the to-number operation of the + IBM Decimal specification.""" + + if isinstance(num, basestring) and num != num.strip(): + return self._raise_error(ConversionSyntax, + "no trailing or leading whitespace is " + "permitted.") + d = Decimal(num, context=self) if d._isnan() and len(d._int) > self.prec - self._clamp: return self._raise_error(ConversionSyntax, @@ -5148,7 +5159,7 @@ _parser = re.compile(r""" # A numeric string consists of: (?P<diag>\d*) # with (possibly empty) diagnostic information. ) # \s* - $ + \Z """, re.VERBOSE | re.IGNORECASE).match _all_zeros = re.compile('0*$').match |