本文整理匯總了Python中decimal.Rounded方法的典型用法代碼示例。如果您正苦於以下問題：Python decimal.Rounded方法的具體用法？Python decimal.Rounded怎麽用？Python decimal.Rounded使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類decimal的用法示例。
在下文中一共展示了decimal.Rounded方法的5個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: format_number
# 需要導入模塊: import decimal [as 別名]
# 或者: from decimal import Rounded [as 別名]
def format_number(value, max_digits, decimal_places):
"""
Formats a number into a string with the requisite number of digits and
decimal places.
"""
if value is None:
return None
if isinstance(value, decimal.Decimal):
context = decimal.getcontext().copy()
if max_digits is not None:
context.prec = max_digits
if decimal_places is not None:
value = value.quantize(decimal.Decimal(".1") ** decimal_places, context=context)
else:
context.traps[decimal.Rounded] = 1
value = context.create_decimal(value)
return "{:f}".format(value)
if decimal_places is not None:
return "%.*f" % (decimal_places, value)
return "{:f}".format(value) 示例2: format_number
# 需要導入模塊: import decimal [as 別名]
# 或者: from decimal import Rounded [as 別名]
def format_number(value, max_digits, decimal_places):
"""
Format a number into a string with the requisite number of digits and
decimal places.
"""
if value is None:
return None
if isinstance(value, decimal.Decimal):
context = decimal.getcontext().copy()
if max_digits is not None:
context.prec = max_digits
if decimal_places is not None:
value = value.quantize(decimal.Decimal(".1") ** decimal_places, context=context)
else:
context.traps[decimal.Rounded] = 1
value = context.create_decimal(value)
return "{:f}".format(value)
if decimal_places is not None:
return "%.*f" % (decimal_places, value)
return "{:f}".format(value) 示例3: format_number
# 需要導入模塊: import decimal [as 別名]
# 或者: from decimal import Rounded [as 別名]
def format_number(value, max_digits, decimal_places):
"""
Format a number into a string with the requisite number of digits and
decimal places.
"""
if value is None:
return None
if isinstance(value, decimal.Decimal):
context = decimal.getcontext().copy()
if max_digits is not None:
context.prec = max_digits
if decimal_places is not None:
value = value.quantize(decimal.Decimal(1).scaleb(-decimal_places), context=context)
else:
context.traps[decimal.Rounded] = 1
value = context.create_decimal(value)
return "{:f}".format(value)
if decimal_places is not None:
return "%.*f" % (decimal_places, value)
return "{:f}".format(value) 示例4: test_format_number
# 需要導入模塊: import decimal [as 別名]
# 或者: from decimal import Rounded [as 別名]
def test_format_number(self):
def equal(value, max_d, places, result):
self.assertEqual(format_number(Decimal(value), max_d, places), result)
equal('0', 12, 3, '0.000')
equal('0', 12, 8, '0.00000000')
equal('1', 12, 9, '1.000000000')
equal('0.00000000', 12, 8, '0.00000000')
equal('0.000000004', 12, 8, '0.00000000')
equal('0.000000008', 12, 8, '0.00000001')
equal('0.000000000000000000999', 10, 8, '0.00000000')
equal('0.1234567890', 12, 10, '0.1234567890')
equal('0.1234567890', 12, 9, '0.123456789')
equal('0.1234567890', 12, 8, '0.12345679')
equal('0.1234567890', 12, 5, '0.12346')
equal('0.1234567890', 12, 3, '0.123')
equal('0.1234567890', 12, 1, '0.1')
equal('0.1234567890', 12, 0, '0')
equal('0.1234567890', None, 0, '0')
equal('1234567890.1234567890', None, 0, '1234567890')
equal('1234567890.1234567890', None, 2, '1234567890.12')
equal('0.1234', 5, None, '0.1234')
equal('123.12', 5, None, '123.12')
with self.assertRaises(Rounded):
equal('0.1234567890', 5, None, '0.12346')
with self.assertRaises(Rounded):
equal('1234567890.1234', 5, None, '1234600000') 示例5: test_format_number
# 需要導入模塊: import decimal [as 別名]
# 或者: from decimal import Rounded [as 別名]
def test_format_number(self):
"""
Test the format_number converter utility
"""
def equal(value, max_d, places, result):
self.assertEqual(format_number(Decimal(value), max_d, places), result)
equal('0', 12, 3,
'0.000')
equal('0', 12, 8,
'0.00000000')
equal('1', 12, 9,
'1.000000000')
equal('0.00000000', 12, 8,
'0.00000000')
equal('0.000000004', 12, 8,
'0.00000000')
equal('0.000000008', 12, 8,
'0.00000001')
equal('0.000000000000000000999', 10, 8,
'0.00000000')
equal('0.1234567890', 12, 10,
'0.1234567890')
equal('0.1234567890', 12, 9,
'0.123456789')
equal('0.1234567890', 12, 8,
'0.12345679')
equal('0.1234567890', 12, 5,
'0.12346')
equal('0.1234567890', 12, 3,
'0.123')
equal('0.1234567890', 12, 1,
'0.1')
equal('0.1234567890', 12, 0,
'0')
equal('0.1234567890', None, 0,
'0')
equal('1234567890.1234567890', None, 0,
'1234567890')
equal('1234567890.1234567890', None, 2,
'1234567890.12')
equal('0.1234', 5, None,
'0.1234')
equal('123.12', 5, None,
'123.12')
with self.assertRaises(Rounded):
equal('0.1234567890', 5, None,
'0.12346')
with self.assertRaises(Rounded):
equal('1234567890.1234', 5, None,
'1234600000')