def get(self, var, section=None, **kwargs):
"""Retrieve a config var.
Return environment variable if it exists
(ie [self.prefix + _] + [section + _] + var)
otherwise var from config file.
If both are null and no default is set a ConfigError will be raised,
otherwise default will be returned.
:param var: key to look up
:param default: default value, must be supplied as keyword
"""
# default is not a specified keyword argument so we can distinguish
# between a default set to None and no default sets
if not section and self.section:
section = self.section
default = kwargs.get('default', None)
env_var = "{}{}{}".format(
_suffix(self.prefix) if self.prefix else '',
_suffix(alphasnake(section)) if section else '',
alphasnake(str(var))).upper()
config = self.config.get(section, {}) if section else self.config
result = config.get(var, default)
result = os.getenv(env_var, default=result)
# no default keyword supplied (and no result)
# use is None to allow empty lists etc
if result is None and 'default' not in kwargs:
msg = "Could not find '{}'".format(var)
if section:
msg = "{} in section '{}'.".format(msg, section)
msg = "{} Checked environment variable: {}".format(msg, env_var)
if self.config_file:
msg = "{} and file: {}".format(msg, self.config_file)
raise ConfigError(msg)
return result
def test_dromedory_case(self):
self.assertEqual('dromedory_case', alphasnake('dromedoryCase'))
self.assertEqual('dromedory_case', alphasnake('dromedoryCase#'))
self.assertEqual('dromedory_case', alphasnake('dromedory#Case'))
def test_upper_case(self):
self.assertEqual('upper', alphasnake('UPPER#'))
self.assertEqual('upper_upper', alphasnake('UPPER# UPPER'))
def test_camel_case(self):
self.assertEqual('camel_case', alphasnake('CamelCase'))
self.assertEqual('camel_case', alphasnake('CamelCase#'))
self.assertEqual('camel_case', alphasnake('Camel#Case'))
def test_lower_case(self):
self.assertEqual('lower', alphasnake('lower#'))
self.assertEqual('lower_lower', alphasnake('lower# lower'))