SQLamarr.PyTransformer.PyTransformer Class Reference

Decorator transforming a python function in a Transformer that can be pipelined to C++ algorithms in a SQLamarr.Pipeline. More...

Detailed Description

Decorator transforming a python function in a Transformer that can be pipelined to C++ algorithms in a SQLamarr.Pipeline.

Example.

import SQLamarr
import pandas as pd
 
db = SQLamarr.SQLite3DB().seed(42)
 
loader = SQLamarr.HepMC2DataLoader(db)
 
pv_finder = SQLamarr.PVFinder(db)
mcps = SQLamarr.MCParticleSelector(db)
 
@SQLamarr.PyTransformer(db)
def selector (connection):
  df = pd.read_sql_query("SELECT * FROM MCParticles", connection)
  df = df[df.pz > 10000]  # Apply a selection
  df.to_sql("MCParticles", connection, if_exists='replace')
 
pipeline = SQLamarr.Pipeline((pv_finder, mcps, selector)) 
 
loader.load("my_file_0.mc2", 42, 0)
pipeline.execute()
 
loader.load("my_file_1.mc2", 42, 1)
pipeline.execute()

Definition at line 12 of file PyTransformer.py.

---

The documentation for this class was generated from the following file:

• python/SQLamarr/PyTransformer.py