|
@@ -67,3 +67,14 @@ def str_filter(f, str, d):
|
|
|
def str_filter_out(f, str, d):
|
|
|
from re import match
|
|
|
return " ".join(filter(lambda x: not match(f, x, 0), str.split()))
|
|
|
+
|
|
|
+def param_bool(cfg, field, dflt = None):
|
|
|
+ """Lookup <field> in <cfg> map and convert it to a boolean; take
|
|
|
+ <dflt> when this <field> does not exist"""
|
|
|
+ value = cfg.get(field, dflt)
|
|
|
+ strvalue = str(value).lower()
|
|
|
+ if strvalue in ('yes', 'y', 'true', 't', '1'):
|
|
|
+ return True
|
|
|
+ elif strvalue in ('no', 'n', 'false', 'f', '0'):
|
|
|
+ return False
|
|
|
+ raise ValueError("invalid value for boolean parameter '%s': '%s'" % (field, value))
|