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- """
- @package grass.script.db
- @brief GRASS Python scripting module
- Database related functions to be used in Python scripts.
- Usage:
- @code
- from grass.script import core, db as grass
- grass.parser()
- grass.db_describe(table)
- ...
- @endcode
- (C) 2008-2009 by the GRASS Development Team
- This program is free software under the GNU General Public
- License (>=v2). Read the file COPYING that comes with GRASS
- for details.
- @author Glynn Clements
- @author Martin Landa <landa.martin gmail.com>
- """
- from core import *
- def db_describe(table, **args):
- """Return the list of columns for a database table
- (interface to `db.describe -c').
- @param table table name
- @param args
- @return parsed module output
- """
- s = read_command('db.describe', flags = 'c', table = table, **args)
- if not s:
- return None
- cols = []
- result = {}
- for l in s.splitlines():
- f = l.split(':')
- key = f[0]
- f[1] = f[1].lstrip(' ')
- if key.startswith('Column '):
- n = int(key.split(' ')[1])
- cols.insert(n, f[1:])
- elif key in ['ncols', 'nrows']:
- result[key] = int(f[1])
- else:
- result[key] = f[1:]
- result['cols'] = cols
- return result
- # run "db.connect -p" and parse output
- def db_connection():
- """Return the current database connection parameters
- (interface to `db.connect -p').
- """
- s = read_command('db.connect', flags = 'p')
- return parse_key_val(s, sep = ':')
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