本文整理汇总了Python中optparse.NO_DEFAULT属性的典型用法代码示例。如果您正苦于以下问题：Python optparse.NO_DEFAULT属性的具体用法？Python optparse.NO_DEFAULT怎么用？Python optparse.NO_DEFAULT使用的例子？那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类optparse的用法示例。
在下文中一共展示了optparse.NO_DEFAULT属性的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _expand_default
# 需要导入模块: import optparse [as 别名]
# 或者: from optparse import NO_DEFAULT [as 别名]
def _expand_default(self, option):
"""Patch OptionParser.expand_default with custom behaviour
This will handle defaults to avoid overriding values in the
configuration file.
"""
if self.parser is None or not self.default_tag:
return option.help
optname = option._long_opts[0][2:]
try:
provider = self.parser.options_manager._all_options[optname]
except KeyError:
value = None
else:
optdict = provider.get_option_def(optname)
optname = provider.option_attrname(optname, optdict)
value = getattr(provider.config, optname, optdict)
value = utils._format_option_value(optdict, value)
if value is optparse.NO_DEFAULT or not value:
value = self.NO_DEFAULT_VALUE
return option.help.replace(self.default_tag, str(value)) 示例2: call_command
# 需要导入模块: import optparse [as 别名]
# 或者: from optparse import NO_DEFAULT [as 别名]
def call_command(name, *args, **options):
"""
Calls the given command, with the given options and args/kwargs.
This is the primary API you should use for calling specific commands.
Some examples:
call_command('syncdb')
call_command('shell', plain=True)
call_command('sqlall', 'myapp')
"""
# Load the command object.
try:
app_name = get_commands()[name]
except KeyError:
raise CommandError("Unknown command: %r" % name)
if isinstance(app_name, BaseCommand):
# If the command is already loaded, use it directly.
klass = app_name
else:
klass = load_command_class(app_name, name)
# Grab out a list of defaults from the options. optparse does this for us
# when the script runs from the command line, but since call_command can
# be called programatically, we need to simulate the loading and handling
# of defaults (see #10080 for details).
defaults = {}
for opt in klass.option_list:
if opt.default is NO_DEFAULT:
defaults[opt.dest] = None
else:
defaults[opt.dest] = opt.default
defaults.update(options)
return klass.execute(*args, **defaults) 示例3: call_command
# 需要导入模块: import optparse [as 别名]
# 或者: from optparse import NO_DEFAULT [as 别名]
def call_command(name, *args, **options):
"""
Calls the given command, with the given options and args/kwargs.
This is the primary API you should use for calling specific commands.
Some examples:
call_command('syncdb')
call_command('shell', plain=True)
call_command('sqlall', 'myapp')
"""
# Load the command object.
try:
app_name = get_commands()[name]
if isinstance(app_name, BaseCommand):
# If the command is already loaded, use it directly.
klass = app_name
else:
klass = load_command_class(app_name, name)
except KeyError:
raise CommandError("Unknown command: %r" % name)
# Grab out a list of defaults from the options. optparse does this for us
# when the script runs from the command line, but since call_command can
# be called programatically, we need to simulate the loading and handling
# of defaults (see #10080 for details).
defaults = dict([(o.dest, o.default)
for o in klass.option_list
if o.default is not NO_DEFAULT])
defaults.update(options)
return klass.execute(*args, **defaults)