otp.eval#

eval(query, symbol=None, start=None, end=None, **kwargs)[source]#

Bind symbol parameter to otp.query or otp.Query and Source for later use

Parameters

  • query (otp.Source, otp.query) –

  • symbol (symbol) –

  • start (meta field (otp.Source.meta_fields) or symbol param) –

  • end (meta field (otp.Source.meta_fields) or symbol param) –

  • kwargs (will be passed to query. Allowed params: strings, numbers, otp.Source meta fields, symbol params) –

Returns

result – Query wrapper

Return type

_QueryEvalWrapper

Examples

>>> def fsq(symbol):
...     symbols = otp.Tick(SYMBOL_NAME=symbol.name + '1')
...     return symbols
>>> def main(symbol):
...     data = otp.DataSource(db='SOME_DB', tick_type='TT')
...     data = otp.funcs.merge([data], symbols=otp.eval(fsq, symbol=symbol))
...     return data
>>> otp.run(main, symbols='S')
                     Time  X
0 2003-12-01 00:00:00.000  1
1 2003-12-01 00:00:00.001  2
2 2003-12-01 00:00:00.002  3