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Django coding style fixes. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@6528 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Gary Wilson Jr 2007-10-19 01:26:09 +00:00
parent 73f495158c
commit 088cb3c2f3
2 changed files with 88 additions and 69 deletions
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108
django/core/management/__init__.py
View File

@ -1,31 +1,35 @@
import django
from django.core.management.base import BaseCommand, CommandError, handle_default_options
from optparse import OptionParser
import os
import sys
from optparse import OptionParser
from imp import find_module
import django
from django.core.management.base import BaseCommand, CommandError, handle_default_options
# For backwards compatibility: get_version() used to be in this module.
get_version = django.get_version
# A cache of loaded commands, so that call_command
# A cache of loaded commands, so that call_command
# doesn't have to reload every time it is called
_commands = None
def find_commands(management_dir):
"""
Given a path to a management directory, return a list of all the command names
that are available. Returns an empty list if no commands are defined.
Given a path to a management directory, returns a list of all the command
names that are available.
Returns an empty list if no commands are defined.
"""
command_dir = os.path.join(management_dir,'commands')
command_dir = os.path.join(management_dir, 'commands')
try:
return [f[:-3] for f in os.listdir(command_dir) if not f.startswith('_') and f.endswith('.py')]
return [f[:-3] for f in os.listdir(command_dir)
if not f.startswith('_') and f.endswith('.py')]
except OSError:
return []
def find_management_module(app_name):
"""
Determine the path to the management module for the application named,
Determines the path to the management module for the application named,
without acutally importing the application or the management module.
Raises ImportError if the management module cannot be found for any reason.
@ -36,23 +40,23 @@ def find_management_module(app_name):
path = None
while parts:
part = parts.pop()
f,path,descr = find_module(part, path and [path] or None)
f, path, descr = find_module(part, path and [path] or None)
return path
def load_command_class(app_name, name):
"""
Given a command name and an application name, returns the Command
Given a command name and an application name, returns the Command
class instance. All errors raised by the importation process
(ImportError, AttributeError) are allowed to propagate.
"""
return getattr(__import__('%s.management.commands.%s' % (app_name, name),
return getattr(__import__('%s.management.commands.%s' % (app_name, name),
{}, {}, ['Command']), 'Command')()
def get_commands(load_user_commands=True, project_directory=None):
"""
Returns a dictionary of commands against the application in which
those commands can be found. This works by looking for a
management.commands package in django.core, and in each installed
those commands can be found. This works by looking for a
management.commands package in django.core, and in each installed
application -- if a commands package exists, all commands in that
package are registered.
@ -62,38 +66,38 @@ def get_commands(load_user_commands=True, project_directory=None):
startapp command will be modified to use that directory.
The dictionary is in the format {command_name: app_name}. Key-value
pairs from this dictionary can then be used in calls to
pairs from this dictionary can then be used in calls to
load_command_class(app_name, command_name)
If a specific version of a command must be loaded (e.g., with the
startapp command), the instantiated module can be placed in the
dictionary in place of the application name.
The dictionary is cached on the first call, and reused on subsequent
calls.
"""
global _commands
if _commands is None:
_commands = dict([(name, 'django.core')
_commands = dict([(name, 'django.core')
for name in find_commands(__path__[0])])
if load_user_commands:
# Get commands from all installed apps
# Get commands from all installed apps.
from django.conf import settings
for app_name in settings.INSTALLED_APPS:
try:
path = find_management_module(app_name)
_commands.update(dict([(name, app_name)
_commands.update(dict([(name, app_name)
for name in find_commands(path)]))
except ImportError:
pass # No management module - ignore this app
if project_directory:
# Remove the "startproject" command from self.commands, because
# that's a django-admin.py command, not a manage.py command.
del _commands['startproject']
# Override the startapp command so that it always uses the
# project_directory, not the current working directory
# project_directory, not the current working directory
# (which is default).
from django.core.management.commands.startapp import ProjectCommand
_commands['startapp'] = ProjectCommand(project_directory)
@ -113,7 +117,7 @@ def call_command(name, *args, **options):
"""
try:
app_name = get_commands()[name]
if isinstance(app_name, BaseCommand):
if isinstance(app_name, BaseCommand):
# If the command is already loaded, use it directly.
klass = app_name
else:
@ -121,16 +125,16 @@ def call_command(name, *args, **options):
except KeyError:
raise CommandError, "Unknown command: %r" % name
return klass.execute(*args, **options)
class LaxOptionParser(OptionParser):
class LaxOptionParser(OptionParser):
"""
An option parser that doesn't raise any errors on unknown options.
This is needed because the --settings and --pythonpath options affect
the commands (and thus the options) that are available to the user.
the commands (and thus the options) that are available to the user.
"""
def error(self, msg):
pass
def error(self, msg):
pass
class ManagementUtility(object):
"""
@ -144,16 +148,19 @@ class ManagementUtility(object):
self.prog_name = os.path.basename(self.argv[0])
self.project_directory = None
self.user_commands = False
def main_help_text(self):
"""
Returns the script's main help text, as a string.
"""
usage = ['%s <subcommand> [options] [args]' % self.prog_name]
usage.append('Django command line tool, version %s' % django.get_version())
usage.append("Type '%s help <subcommand>' for help on a specific subcommand." % self.prog_name)
usage.append('Django command line tool,'
' version %s' % django.get_version())
usage.append("Type '%s help <subcommand>' for help on a specific"
" subcommand." % self.prog_name)
usage.append('Available subcommands:')
commands = get_commands(self.user_commands, self.project_directory).keys()
commands = get_commands(self.user_commands,
self.project_directory).keys()
commands.sort()
for cmd in commands:
usage.append(' %s' % cmd)
@ -166,33 +173,35 @@ class ManagementUtility(object):
django-admin.py or manage.py) if it can't be found.
"""
try:
app_name = get_commands(self.user_commands, self.project_directory)[subcommand]
if isinstance(app_name, BaseCommand):
app_name = get_commands(self.user_commands,
self.project_directory)[subcommand]
if isinstance(app_name, BaseCommand):
# If the command is already loaded, use it directly.
klass = app_name
else:
klass = load_command_class(app_name, subcommand)
except KeyError:
sys.stderr.write("Unknown command: %r\nType '%s help' for usage.\n" % (subcommand, self.prog_name))
sys.stderr.write("Unknown command: %r\nType '%s help' for"
" usage.\n" % (subcommand, self.prog_name))
sys.exit(1)
return klass
def execute(self):
"""
Given the command-line arguments, this figures out which subcommand is
being run, creates a parser appropriate to that command, and runs it.
"""
# Preprocess options to extract --settings and --pythonpath. These options
# could affect the commands that are available, so they must be processed
# early
parser = LaxOptionParser(version=get_version(),
option_list=BaseCommand.option_list)
# Preprocess options to extract --settings and --pythonpath.
# These options could affect the commands that are available, so they
# must be processed early.
parser = LaxOptionParser(version=get_version(),
option_list=BaseCommand.option_list)
try:
options, args = parser.parse_args(self.argv)
options, args = parser.parse_args(self.argv)
handle_default_options(options)
except:
except:
pass # Ignore any option errors at this point.
try:
subcommand = self.argv[1]
except IndexError:
@ -227,10 +236,10 @@ class ProjectManagementUtility(ManagementUtility):
super(ProjectManagementUtility, self).__init__(argv)
self.project_directory = project_directory
self.user_commands = True
def setup_environ(settings_mod):
"""
Configure the runtime environment. This can also be used by external
Configures the runtime environment. This can also be used by external
scripts wanting to set up a similar environment to manage.py.
"""
# Add this project to sys.path so that it's importable in the conventional
@ -244,7 +253,8 @@ def setup_environ(settings_mod):
sys.path.pop()
# Set DJANGO_SETTINGS_MODULE appropriately.
os.environ['DJANGO_SETTINGS_MODULE'] = '%s.%s' % (project_name, settings_name)
os.environ['DJANGO_SETTINGS_MODULE'] = '%s.%s' % (project_name,
settings_name)
return project_directory
def execute_from_command_line(argv=None):

49
django/utils/datastructures.py
View File

@ -42,22 +42,25 @@ class MergeDict(object):
if key in dict:
return True
return False
__contains__ = has_key
def copy(self):
""" returns a copy of this object"""
"""Returns a copy of this object."""
return self.__copy__()
class SortedDict(dict):
"A dictionary that keeps its keys in the order in which they're inserted."
"""
A dictionary that keeps its keys in the order in which they're inserted.
"""
def __init__(self, data=None):
if data is None: data = {}
if data is None:
data = {}
dict.__init__(self, data)
if isinstance(data, dict):
self.keyOrder = data.keys()
else:
self.keyOrder=[key for key, value in data]
self.keyOrder = [key for key, value in data]
def __setitem__(self, key, value):
dict.__setitem__(self, key, value)
@ -102,20 +105,21 @@ class SortedDict(dict):
return dict.setdefault(self, key, default)
def value_for_index(self, index):
"Returns the value of the item at the given zero-based index."
"""Returns the value of the item at the given zero-based index."""
return self[self.keyOrder[index]]
def insert(self, index, key, value):
"Inserts the key, value pair before the item with the given index."
"""Inserts the key, value pair before the item with the given index."""
if key in self.keyOrder:
n = self.keyOrder.index(key)
del self.keyOrder[n]
if n < index: index -= 1
if n < index:
index -= 1
self.keyOrder.insert(index, key)
dict.__setitem__(self, key, value)
def copy(self):
"Returns a copy of this object."
"""Returns a copy of this object."""
# This way of initializing the copy means it works for subclasses, too.
obj = self.__class__(self)
obj.keyOrder = self.keyOrder
@ -133,7 +137,8 @@ class MultiValueDictKeyError(KeyError):
class MultiValueDict(dict):
"""
A subclass of dictionary customized to handle multiple values for the same key.
A subclass of dictionary customized to handle multiple values for the
same key.
>>> d = MultiValueDict({'name': ['Adrian', 'Simon'], 'position': ['Developer']})
>>> d['name']
@ -176,15 +181,17 @@ class MultiValueDict(dict):
def __deepcopy__(self, memo=None):
import copy
if memo is None: memo = {}
if memo is None:
memo = {}
result = self.__class__()
memo[id(self)] = result
for key, value in dict.items(self):
dict.__setitem__(result, copy.deepcopy(key, memo), copy.deepcopy(value, memo))
dict.__setitem__(result, copy.deepcopy(key, memo),
copy.deepcopy(value, memo))
return result
def get(self, key, default=None):
"Returns the default value if the requested data doesn't exist"
"""Returns the default value if the requested data doesn't exist."""
try:
val = self[key]
except KeyError:
@ -194,7 +201,7 @@ class MultiValueDict(dict):
return val
def getlist(self, key):
"Returns an empty list if the requested data doesn't exist"
"""Returns an empty list if the requested data doesn't exist."""
try:
return dict.__getitem__(self, key)
except KeyError:
@ -214,7 +221,7 @@ class MultiValueDict(dict):
return self.getlist(key)
def appendlist(self, key, value):
"Appends an item to the internal list associated with key"
"""Appends an item to the internal list associated with key."""
self.setlistdefault(key, [])
dict.__setitem__(self, key, self.getlist(key) + [value])
@ -226,19 +233,22 @@ class MultiValueDict(dict):
return [(key, self[key]) for key in self.keys()]
def lists(self):
"Returns a list of (key, list) pairs."
"""Returns a list of (key, list) pairs."""
return dict.items(self)
def values(self):
"Returns a list of the last value on every key list."
"""Returns a list of the last value on every key list."""
return [self[key] for key in self.keys()]
def copy(self):
"Returns a copy of this object."
"""Returns a copy of this object."""
return self.__deepcopy__()
def update(self, *args, **kwargs):
"update() extends rather than replaces existing key lists. Also accepts keyword args."
"""
update() extends rather than replaces existing key lists.
Also accepts keyword args.
"""
if len(args) > 1:
raise TypeError, "update expected at most 1 arguments, got %d" % len(args)
if args:
@ -299,4 +309,3 @@ class FileDict(dict):
d = dict(self, content='<omitted>')
return dict.__repr__(d)
return dict.__repr__(self)