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SequoiaDB
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Public Member Functions | |
| def | __init__ |
| def | __del__ |
| def | __str__ |
| def | __repr__ |
| def | __eq__ |
| def | __ne__ |
| def | set_zero |
| def | is_zero |
| def | set_min |
| def | is_min |
| def | set_max |
| def | is_max |
| def | to_int |
| def | to_float |
| def | to_string |
| def | compare |
Decimal type for SequoiaDB
decimal is an type of element of bson, for the seak of double(IEEE)
usage:
>>> import bson
>>> from bson import Decimal
>>> obj = Decimal("12345.6789098765", 1000, 100) # precision 1000, scale 100
# use a decimal into bson as blow:
>>> doc = { 'rest':obj }
>>> print (doc)
{ "$decimal": "12345.6789098765", "$precision": [1000, 10] }
>>> doc = { "decimal": doc }
when a doc with decimal element encoded to an bson obj, it can be used to insert into SequoiaDB
and it also can be decoded into an decimal object from bson object
>>> bobj = bson.BSON.encode(doc)
>>> dd = bson.BSON.decode(bobj)
>>> v = dd['decimal']
>>> v
{ "$decimal": "12345.6789098765", "$precision": [1000, 10] }
>>> type(v)
<class 'bson.decimal.Decimal'>
methods can be listed by using dir(obj)
| def bson.decimal.Decimal.__init__ | ( | self, | |
| value, | |||
precision = None, |
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scale = None |
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| ) |
create an decimal object, precision and scale are 0 by default and precision is limited under 1000
| def bson.decimal.Decimal.compare | ( | self, | |
| rhs | |||
| ) |
compare between two decimal object. if int is specified, int value will be converted to an decimal object, then compare
| def bson.decimal.Decimal.is_max | ( | self | ) |
charge the value of decimal is min value or not
| def bson.decimal.Decimal.is_min | ( | self | ) |
charge the value of decimal is min value or not
| def bson.decimal.Decimal.is_zero | ( | self | ) |
charge the value of decimal is zero ir not
| def bson.decimal.Decimal.set_max | ( | self | ) |
set the value of decimal is the max value
| def bson.decimal.Decimal.set_min | ( | self | ) |
set the value of decimal is the min value
| def bson.decimal.Decimal.set_zero | ( | self | ) |
set the decimal object as an instance initalized by 0
| def bson.decimal.Decimal.to_float | ( | self | ) |
force the decimal to be an float(double is supported), and show it regularized by scale
| def bson.decimal.Decimal.to_int | ( | self | ) |
force the decimal to be an int(long), and show it regularized by scale
| def bson.decimal.Decimal.to_string | ( | self | ) |
force the decimal to be an string, and show it regularized by scale
1.8.2