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"""Output formatters using shell syntax.
"""
from .base import SingleFormatter
class ShellFormatter(SingleFormatter):
def add_argument_group(self, parser):
group = parser.add_argument_group(
title='shell formatter',
description='Print values in a format a UNIX shell can parse (variable="value")',
)
group.add_argument(
'--variable',
action='append',
default=[],
dest='variables',
metavar='VARIABLE',
help='specify the variable(s) to include, can be repeated',
)
def emit_one(self, column_names, data, stdout, parsed_args):
variable_names = [c.lower().replace(' ', '_')
for c in column_names
]
desired_columns = parsed_args.variables
for name, value in zip(variable_names, data):
if name in desired_columns or not desired_columns:
stdout.write('%s="%s"\n' % (name, value))
return
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