Skip to content

Latest commit

 

History

History
80 lines (53 loc) · 2.06 KB

00300tslavalid.rst

File metadata and controls

80 lines (53 loc) · 2.06 KB
Raw

Tesla Closing Price from Two Sources, With Validity Checks

Adding the Symbol

from trump.orm import SymbolManager
from trump.templating import QuandlFT, GoogleFinanceFT, 
                             DateExistsVT, FeedsMatchVT

sm = SymbolManager()

TSLA = sm.create(name = "TSLA",
                 description = "Tesla Closing Price USD",
                 units = '$ / share')

TSLA.add_feed(GoogleFinanceFT("TSLA")) 
TSLA.add_feed(QuandlFT("GOOG/NASDAQ_TSLA", fieldname='Close'))

# Tell trump, to check the first and second feed,
# because they should be equal.

validity_settings = FeedsMatchVT(1, 2)
TSLA.add_validity(validity_settings)

# Tell trump, to make sure we have a data point for the current day
# any time we check validity. 

validity_settings = DateExistsVT('today')
TSLA.add_validity(validity_settings)

# By default, the cache process checks the validity settings
# or will raise/log/warn/print/etc. based on the appropriate
# handler for validity.

# Since we're going to check validity, with a bit more
# granularity upstream/later, we can skip it during the cache process
# by setting it to False.

TSLA.cache(checkvalidty=False) 

sm.finish()

Using the Symbol

from trump.orm import SymbolManager

sm = SymbolManager()

TSLA = sm.get("TSLA")

#optional
TSLA.cache()

#There are a few options, to check the data...

#Individual validity checks can be ran, with the 
# settings stored persistently in the object

# Eg 1
if TSLA.check_validity('FeedsMatch'):
   #do stuff with clean data

# Eg 2
if TSLA.check_validity('DateExists'):
   #do stuff with today's data point

# Or, all the validity checks with their 
# respective settings can be ran with one simple
# property:

if TSLA.isvalid:
   #do stuff with knowing both feeds match, and 
   # a datapoint for today exists.