otp.Source.table#
- Source.table(inplace=False, strict=True, **schema)#
Set the OneTick and python schemas levels according to the
schema
parameter. Theschema
should contain either (field_name -> type) pairs or (field_name -> default value) pairs;None
means no specified type, and OneTick considers it’s as a double type.Resulting ticks have the same order as in the
schema
. If only partial fields are specified (i.e. when thestrict=False
) then fields from theschema
have the most left position.- Parameters
inplace (bool) – The flag controls whether operations should be applied inplace
strict (bool) – If set to
False
, all fields present in an input tick will be present in the output tick. IfTrue
, then only fields specified in theschema
.schema – field_name -> type or field_name -> default value pairs that should be applied on the source.
self (Source) –
- Return type
Source
orNone
Examples
Selection case
>>> data = otp.Ticks(X1=[1, 2, 3], ... X2=[3, 2, 1], ... A1=["A", "A", "A"]) >>> data = data.table(X2=int, A1=str) >>> otp.run(data) Time X2 A1 0 2003-12-01 00:00:00.000 3 A 1 2003-12-01 00:00:00.001 2 A 2 2003-12-01 00:00:00.002 1 A
Defining default values case (note the order)
>>> data = otp.Ticks(X=[1, 2, 3]) >>> data = data.table(Y=0.5, strict=False) >>> otp.run(data) Time Y X 0 2003-12-01 00:00:00.000 0.5 1 1 2003-12-01 00:00:00.001 0.5 2 2 2003-12-01 00:00:00.002 0.5 3
See also