#-----------------------------------------------------------------------
# imports
#-----------------------------------------------------------------------
import hep.table
from hep.test import compare
#-----------------------------------------------------------------------
# test
#-----------------------------------------------------------------------
schema = hep.table.Schema()
table = hep.table.create("index1.table", schema)
for i in range(10):
table.append()
del table
table = hep.table.open("index1.table")
index_expr = table.compile("_index")
for i in range(9, -1, -1):
row = table[i]
compare(row["_index"], i)
compare(index_expr.evaluate(row), i)
for row in table.select("_index % 3 == 1"):
compare(row["_index"] % 3, 1)
import hep.table
import hep.table.parse
from math import sqrt
table = hep.table.open("tracks.table")
momentum = hep.expr.parse(
"sqrt(momentum_x**2 + momentum_y**2 + momentum_z**2)")
momentum = table.compile(momentum)
print momentum
for track in table:
energy = track["energy"]
mass = sqrt(energy ** 2 - momentum ** 2)
print "energy=%8.6f momentum=%8.6f mass=%8.6f" \
% (energy, momentum(track), mass)