/usr/lib/python2.7/dist-packages/pep8ext_naming.py is in python-pep8-naming 0.3.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 | # -*- coding: utf-8 -*-
"""Checker of PEP-8 Naming Conventions."""
import re
import sys
from collections import deque
try:
import ast
from ast import iter_child_nodes
except ImportError:
from flake8.util import ast, iter_child_nodes
__version__ = '0.3.3'
LOWERCASE_REGEX = re.compile(r'[_a-z][_a-z0-9]*$')
UPPERCASE_REGEX = re.compile(r'[_A-Z][_A-Z0-9]*$')
MIXEDCASE_REGEX = re.compile(r'_?[A-Z][a-zA-Z0-9]*$')
SPLIT_IGNORED_RE = re.compile(r'[,\s]')
if sys.version_info[0] < 3:
def _unpack_args(args):
ret = []
for arg in args:
if isinstance(arg, ast.Tuple):
ret.extend(_unpack_args(arg.elts))
else:
ret.append(arg.id)
return ret
def get_arg_names(node):
return _unpack_args(node.args.args)
else:
def get_arg_names(node):
pos_args = [arg.arg for arg in node.args.args]
kw_only = [arg.arg for arg in node.args.kwonlyargs]
return pos_args + kw_only
class _ASTCheckMeta(type):
def __init__(self, class_name, bases, namespace):
try:
self._checks.append(self())
except AttributeError:
self._checks = []
def _err(self, node, code):
lineno, col_offset = node.lineno, node.col_offset
if isinstance(node, ast.ClassDef):
lineno += len(node.decorator_list)
col_offset += 6
elif isinstance(node, ast.FunctionDef):
lineno += len(node.decorator_list)
col_offset += 4
return (lineno, col_offset, '%s %s' % (code, getattr(self, code)), self)
BaseASTCheck = _ASTCheckMeta('BaseASTCheck', (object,),
{'__doc__': "Base for AST Checks.", 'err': _err})
class NamingChecker(object):
"""Checker of PEP-8 Naming Conventions."""
name = 'naming'
version = __version__
ignore_names = ['setUp', 'tearDown', 'setUpClass', 'tearDownClass']
def __init__(self, tree, filename):
self.visitors = BaseASTCheck._checks
self.parents = deque()
self._node = tree
@classmethod
def add_options(cls, parser):
ignored = ','.join(cls.ignore_names)
parser.add_option('--ignore-names', default=ignored,
action='store', type='string',
help="Names that should be ignored.")
parser.config_options.append('ignore-names')
@classmethod
def parse_options(cls, options):
cls.ignore_names = SPLIT_IGNORED_RE.split(options.ignore_names)
def run(self):
return self.visit_tree(self._node) if self._node else ()
def visit_tree(self, node):
for error in self.visit_node(node):
yield error
self.parents.append(node)
for child in iter_child_nodes(node):
for error in self.visit_tree(child):
yield error
self.parents.pop()
def visit_node(self, node):
if isinstance(node, ast.ClassDef):
self.tag_class_functions(node)
elif isinstance(node, ast.FunctionDef):
self.find_global_defs(node)
method = 'visit_' + node.__class__.__name__.lower()
parents = self.parents
ignore_names = self.ignore_names
for visitor in self.visitors:
visitor_method = getattr(visitor, method, None)
if visitor_method is None:
continue
for error in visitor_method(node, parents, ignore_names):
yield error
def tag_class_functions(self, cls_node):
"""Tag functions if they are methods, classmethods, staticmethods"""
# tries to find all 'old style decorators' like
# m = staticmethod(m)
late_decoration = {}
for node in iter_child_nodes(cls_node):
if not (isinstance(node, ast.Assign) and
isinstance(node.value, ast.Call) and
isinstance(node.value.func, ast.Name)):
continue
func_name = node.value.func.id
if func_name in ('classmethod', 'staticmethod'):
meth = (len(node.value.args) == 1 and node.value.args[0])
if isinstance(meth, ast.Name):
late_decoration[meth.id] = func_name
# iterate over all functions and tag them
for node in iter_child_nodes(cls_node):
if not isinstance(node, ast.FunctionDef):
continue
node.function_type = 'method'
if node.name == '__new__':
node.function_type = 'classmethod'
if node.name in late_decoration:
node.function_type = late_decoration[node.name]
elif node.decorator_list:
names = [d.id for d in node.decorator_list
if isinstance(d, ast.Name) and
d.id in ('classmethod', 'staticmethod')]
if names:
node.function_type = names[0]
def find_global_defs(self, func_def_node):
global_names = set()
nodes_to_check = deque(iter_child_nodes(func_def_node))
while nodes_to_check:
node = nodes_to_check.pop()
if isinstance(node, ast.Global):
global_names.update(node.names)
if not isinstance(node, (ast.FunctionDef, ast.ClassDef)):
nodes_to_check.extend(iter_child_nodes(node))
func_def_node.global_names = global_names
class ClassNameCheck(BaseASTCheck):
"""
Almost without exception, class names use the CapWords convention.
Classes for internal use have a leading underscore in addition.
"""
check = MIXEDCASE_REGEX.match
N801 = "class names should use CapWords convention"
def visit_classdef(self, node, parents, ignore=None):
if not self.check(node.name):
yield self.err(node, 'N801')
class FunctionNameCheck(BaseASTCheck):
"""
Function names should be lowercase, with words separated by underscores
as necessary to improve readability.
Functions *not* beeing methods '__' in front and back are not allowed.
mixedCase is allowed only in contexts where that's already the
prevailing style (e.g. threading.py), to retain backwards compatibility.
"""
check = LOWERCASE_REGEX.match
N802 = "function name should be lowercase"
def visit_functiondef(self, node, parents, ignore=None):
function_type = getattr(node, 'function_type', 'function')
name = node.name
if ignore and name in ignore:
return
if ((function_type == 'function' and '__' in (name[:2], name[-2:])) or
not self.check(name)):
yield self.err(node, 'N802')
class FunctionArgNamesCheck(BaseASTCheck):
"""
The argument names of a function should be lowercase, with words separated
by underscores.
A classmethod should have 'cls' as first argument.
A method should have 'self' as first argument.
"""
check = LOWERCASE_REGEX.match
N803 = "argument name should be lowercase"
N804 = "first argument of a classmethod should be named 'cls'"
N805 = "first argument of a method should be named 'self'"
def visit_functiondef(self, node, parents, ignore=None):
def arg_name(arg):
return getattr(arg, 'arg', arg)
kwarg = arg_name(node.args.kwarg)
if kwarg is not None:
if not self.check(kwarg):
yield self.err(node, 'N803')
return
vararg = arg_name(node.args.vararg)
if vararg is not None:
if not self.check(vararg):
yield self.err(node, 'N803')
return
arg_names = get_arg_names(node)
if not arg_names:
return
function_type = getattr(node, 'function_type', 'function')
if function_type == 'method':
if arg_names[0] != 'self':
yield self.err(node, 'N805')
elif function_type == 'classmethod':
if arg_names[0] != 'cls':
yield self.err(node, 'N804')
for arg in arg_names:
if not self.check(arg):
yield self.err(node, 'N803')
return
class ImportAsCheck(BaseASTCheck):
"""
Don't change the naming convention via an import
"""
check_lower = LOWERCASE_REGEX.match
check_upper = UPPERCASE_REGEX.match
N811 = "constant imported as non constant"
N812 = "lowercase imported as non lowercase"
N813 = "camelcase imported as lowercase"
N814 = "camelcase imported as constant"
def visit_importfrom(self, node, parents, ignore=None):
for name in node.names:
if not name.asname:
continue
if self.check_upper(name.name):
if not self.check_upper(name.asname):
yield self.err(node, 'N811')
elif self.check_lower(name.name):
if not self.check_lower(name.asname):
yield self.err(node, 'N812')
elif self.check_lower(name.asname):
yield self.err(node, 'N813')
elif self.check_upper(name.asname):
yield self.err(node, 'N814')
class VariablesInFunctionCheck(BaseASTCheck):
"""
Local variables in functions should be lowercase
"""
check = LOWERCASE_REGEX.match
N806 = "variable in function should be lowercase"
def visit_assign(self, node, parents, ignore=None):
for parent_func in reversed(parents):
if isinstance(parent_func, ast.ClassDef):
return
if isinstance(parent_func, ast.FunctionDef):
break
else:
return
for target in node.targets:
name = isinstance(target, ast.Name) and target.id
if not name or name in parent_func.global_names:
return
if not self.check(name) and name[:1] != '_':
if isinstance(node.value, ast.Call):
if isinstance(node.value.func, ast.Attribute):
if node.value.func.attr == 'namedtuple':
return
elif isinstance(node.value.func, ast.Name):
if node.value.func.id == 'namedtuple':
return
yield self.err(target, 'N806')
|