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pigDecorators.py
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pigDecorators.py
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__author__="Alan Crosswell <[email protected]>"
"""
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Copyright (c) 2013 Alan Crosswell
"""
def outputSchema(schema):
"""
allow friendly use of your code outside the Pig context by defining a decorator that
returns the results as a dict.
Add this to your code:
if 'outputSchema' not in locals():
from pigDecorators import *
"""
sch = []
for s in schema.split(','):
name,type = s.split(':')
sch.append(name)
def wrapper(func):
def impl(*args, **kwargs):
keyz = {}
r = func(*args, **kwargs)
if not r: return None
for n in range(len(r)):
keyz[sch[n]] = r[n]
return keyz
return impl
return wrapper