Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.11/site-packages/black/mode.py: 79%

1"""Data structures configuring Black behavior. 

2 

3Mostly around Python language feature support per version and Black configuration 

4chosen by the user. 

5""" 

6 

7from dataclasses import dataclass, field 

8from enum import Enum, auto 

9from hashlib import sha256 

10from operator import attrgetter 

11from typing import Final 

12 

13from black.const import DEFAULT_LINE_LENGTH 

14 

15 

16class TargetVersion(Enum): 

17 PY33 = 3 

18 PY34 = 4 

19 PY35 = 5 

20 PY36 = 6 

21 PY37 = 7 

22 PY38 = 8 

23 PY39 = 9 

24 PY310 = 10 

25 PY311 = 11 

26 PY312 = 12 

27 PY313 = 13 

28 PY314 = 14 

29 PY315 = 15 

30 

31 def pretty(self) -> str: 

32 assert self.name[:2] == "PY" 

33 return f"Python {self.name[2]}.{self.name[3:]}" 

34 

35 

36class Feature(Enum): 

37 F_STRINGS = 2 

38 NUMERIC_UNDERSCORES = 3 

39 TRAILING_COMMA_IN_CALL = 4 

40 TRAILING_COMMA_IN_DEF = 5 

41 # The following two feature-flags are mutually exclusive, and exactly one should be 

42 # set for every version of python. 

43 ASYNC_IDENTIFIERS = 6 

44 ASYNC_KEYWORDS = 7 

45 ASSIGNMENT_EXPRESSIONS = 8 

46 POS_ONLY_ARGUMENTS = 9 

47 RELAXED_DECORATORS = 10 

48 PATTERN_MATCHING = 11 

49 UNPACKING_ON_FLOW = 12 

50 ANN_ASSIGN_EXTENDED_RHS = 13 

51 EXCEPT_STAR = 14 

52 VARIADIC_GENERICS = 15 

53 DEBUG_F_STRINGS = 16 

54 PARENTHESIZED_CONTEXT_MANAGERS = 17 

55 TYPE_PARAMS = 18 

56 # FSTRING_PARSING = 19 # unused 

57 TYPE_PARAM_DEFAULTS = 20 

58 UNPARENTHESIZED_EXCEPT_TYPES = 21 

59 T_STRINGS = 22 

60 LAZY_IMPORTS = 23 

61 UNPACKING_IN_COMPREHENSIONS = 24 

62 FORCE_OPTIONAL_PARENTHESES = 50 

63 

64 # __future__ flags 

65 FUTURE_ANNOTATIONS = 51 

66 

67 

68FUTURE_FLAG_TO_FEATURE: Final = { 

69 "annotations": Feature.FUTURE_ANNOTATIONS, 

70} 

71 

72 

73VERSION_TO_FEATURES: dict[TargetVersion, set[Feature]] = { 

74 TargetVersion.PY33: {Feature.ASYNC_IDENTIFIERS}, 

75 TargetVersion.PY34: {Feature.ASYNC_IDENTIFIERS}, 

76 TargetVersion.PY35: {Feature.TRAILING_COMMA_IN_CALL, Feature.ASYNC_IDENTIFIERS}, 

77 TargetVersion.PY36: { 

78 Feature.F_STRINGS, 

79 Feature.NUMERIC_UNDERSCORES, 

80 Feature.TRAILING_COMMA_IN_CALL, 

81 Feature.TRAILING_COMMA_IN_DEF, 

82 Feature.ASYNC_IDENTIFIERS, 

83 }, 

84 TargetVersion.PY37: { 

85 Feature.F_STRINGS, 

86 Feature.NUMERIC_UNDERSCORES, 

87 Feature.TRAILING_COMMA_IN_CALL, 

88 Feature.TRAILING_COMMA_IN_DEF, 

89 Feature.ASYNC_KEYWORDS, 

90 Feature.FUTURE_ANNOTATIONS, 

91 }, 

92 TargetVersion.PY38: { 

93 Feature.F_STRINGS, 

94 Feature.DEBUG_F_STRINGS, 

95 Feature.NUMERIC_UNDERSCORES, 

96 Feature.TRAILING_COMMA_IN_CALL, 

97 Feature.TRAILING_COMMA_IN_DEF, 

98 Feature.ASYNC_KEYWORDS, 

99 Feature.FUTURE_ANNOTATIONS, 

100 Feature.ASSIGNMENT_EXPRESSIONS, 

101 Feature.POS_ONLY_ARGUMENTS, 

102 Feature.UNPACKING_ON_FLOW, 

103 Feature.ANN_ASSIGN_EXTENDED_RHS, 

104 }, 

105 TargetVersion.PY39: { 

106 Feature.F_STRINGS, 

107 Feature.DEBUG_F_STRINGS, 

108 Feature.NUMERIC_UNDERSCORES, 

109 Feature.TRAILING_COMMA_IN_CALL, 

110 Feature.TRAILING_COMMA_IN_DEF, 

111 Feature.ASYNC_KEYWORDS, 

112 Feature.FUTURE_ANNOTATIONS, 

113 Feature.ASSIGNMENT_EXPRESSIONS, 

114 Feature.RELAXED_DECORATORS, 

115 Feature.POS_ONLY_ARGUMENTS, 

116 Feature.UNPACKING_ON_FLOW, 

117 Feature.ANN_ASSIGN_EXTENDED_RHS, 

118 Feature.PARENTHESIZED_CONTEXT_MANAGERS, 

119 }, 

120 TargetVersion.PY310: { 

121 Feature.F_STRINGS, 

122 Feature.DEBUG_F_STRINGS, 

123 Feature.NUMERIC_UNDERSCORES, 

124 Feature.TRAILING_COMMA_IN_CALL, 

125 Feature.TRAILING_COMMA_IN_DEF, 

126 Feature.ASYNC_KEYWORDS, 

127 Feature.FUTURE_ANNOTATIONS, 

128 Feature.ASSIGNMENT_EXPRESSIONS, 

129 Feature.RELAXED_DECORATORS, 

130 Feature.POS_ONLY_ARGUMENTS, 

131 Feature.UNPACKING_ON_FLOW, 

132 Feature.ANN_ASSIGN_EXTENDED_RHS, 

133 Feature.PARENTHESIZED_CONTEXT_MANAGERS, 

134 Feature.PATTERN_MATCHING, 

135 }, 

136 TargetVersion.PY311: { 

137 Feature.F_STRINGS, 

138 Feature.DEBUG_F_STRINGS, 

139 Feature.NUMERIC_UNDERSCORES, 

140 Feature.TRAILING_COMMA_IN_CALL, 

141 Feature.TRAILING_COMMA_IN_DEF, 

142 Feature.ASYNC_KEYWORDS, 

143 Feature.FUTURE_ANNOTATIONS, 

144 Feature.ASSIGNMENT_EXPRESSIONS, 

145 Feature.RELAXED_DECORATORS, 

146 Feature.POS_ONLY_ARGUMENTS, 

147 Feature.UNPACKING_ON_FLOW, 

148 Feature.ANN_ASSIGN_EXTENDED_RHS, 

149 Feature.PARENTHESIZED_CONTEXT_MANAGERS, 

150 Feature.PATTERN_MATCHING, 

151 Feature.EXCEPT_STAR, 

152 Feature.VARIADIC_GENERICS, 

153 }, 

154 TargetVersion.PY312: { 

155 Feature.F_STRINGS, 

156 Feature.DEBUG_F_STRINGS, 

157 Feature.NUMERIC_UNDERSCORES, 

158 Feature.TRAILING_COMMA_IN_CALL, 

159 Feature.TRAILING_COMMA_IN_DEF, 

160 Feature.ASYNC_KEYWORDS, 

161 Feature.FUTURE_ANNOTATIONS, 

162 Feature.ASSIGNMENT_EXPRESSIONS, 

163 Feature.RELAXED_DECORATORS, 

164 Feature.POS_ONLY_ARGUMENTS, 

165 Feature.UNPACKING_ON_FLOW, 

166 Feature.ANN_ASSIGN_EXTENDED_RHS, 

167 Feature.PARENTHESIZED_CONTEXT_MANAGERS, 

168 Feature.PATTERN_MATCHING, 

169 Feature.EXCEPT_STAR, 

170 Feature.VARIADIC_GENERICS, 

171 Feature.TYPE_PARAMS, 

172 }, 

173 TargetVersion.PY313: { 

174 Feature.F_STRINGS, 

175 Feature.DEBUG_F_STRINGS, 

176 Feature.NUMERIC_UNDERSCORES, 

177 Feature.TRAILING_COMMA_IN_CALL, 

178 Feature.TRAILING_COMMA_IN_DEF, 

179 Feature.ASYNC_KEYWORDS, 

180 Feature.FUTURE_ANNOTATIONS, 

181 Feature.ASSIGNMENT_EXPRESSIONS, 

182 Feature.RELAXED_DECORATORS, 

183 Feature.POS_ONLY_ARGUMENTS, 

184 Feature.UNPACKING_ON_FLOW, 

185 Feature.ANN_ASSIGN_EXTENDED_RHS, 

186 Feature.PARENTHESIZED_CONTEXT_MANAGERS, 

187 Feature.PATTERN_MATCHING, 

188 Feature.EXCEPT_STAR, 

189 Feature.VARIADIC_GENERICS, 

190 Feature.TYPE_PARAMS, 

191 Feature.TYPE_PARAM_DEFAULTS, 

192 }, 

193 TargetVersion.PY314: { 

194 Feature.F_STRINGS, 

195 Feature.DEBUG_F_STRINGS, 

196 Feature.NUMERIC_UNDERSCORES, 

197 Feature.TRAILING_COMMA_IN_CALL, 

198 Feature.TRAILING_COMMA_IN_DEF, 

199 Feature.ASYNC_KEYWORDS, 

200 Feature.FUTURE_ANNOTATIONS, 

201 Feature.ASSIGNMENT_EXPRESSIONS, 

202 Feature.RELAXED_DECORATORS, 

203 Feature.POS_ONLY_ARGUMENTS, 

204 Feature.UNPACKING_ON_FLOW, 

205 Feature.ANN_ASSIGN_EXTENDED_RHS, 

206 Feature.PARENTHESIZED_CONTEXT_MANAGERS, 

207 Feature.PATTERN_MATCHING, 

208 Feature.EXCEPT_STAR, 

209 Feature.VARIADIC_GENERICS, 

210 Feature.TYPE_PARAMS, 

211 Feature.TYPE_PARAM_DEFAULTS, 

212 Feature.UNPARENTHESIZED_EXCEPT_TYPES, 

213 Feature.T_STRINGS, 

214 }, 

215 TargetVersion.PY315: { 

216 Feature.F_STRINGS, 

217 Feature.DEBUG_F_STRINGS, 

218 Feature.NUMERIC_UNDERSCORES, 

219 Feature.TRAILING_COMMA_IN_CALL, 

220 Feature.TRAILING_COMMA_IN_DEF, 

221 Feature.ASYNC_KEYWORDS, 

222 Feature.FUTURE_ANNOTATIONS, 

223 Feature.ASSIGNMENT_EXPRESSIONS, 

224 Feature.RELAXED_DECORATORS, 

225 Feature.POS_ONLY_ARGUMENTS, 

226 Feature.UNPACKING_ON_FLOW, 

227 Feature.ANN_ASSIGN_EXTENDED_RHS, 

228 Feature.PARENTHESIZED_CONTEXT_MANAGERS, 

229 Feature.PATTERN_MATCHING, 

230 Feature.EXCEPT_STAR, 

231 Feature.VARIADIC_GENERICS, 

232 Feature.TYPE_PARAMS, 

233 Feature.TYPE_PARAM_DEFAULTS, 

234 Feature.UNPARENTHESIZED_EXCEPT_TYPES, 

235 Feature.T_STRINGS, 

236 Feature.LAZY_IMPORTS, 

237 Feature.UNPACKING_IN_COMPREHENSIONS, 

238 }, 

239} 

240 

241 

242def supports_feature(target_versions: set[TargetVersion], feature: Feature) -> bool: 

243 if not target_versions: 

244 raise ValueError("At least one target Python version must be specified.") 

245 

246 return all(feature in VERSION_TO_FEATURES[version] for version in target_versions) 

247 

248 

249class Preview(Enum): 

250 """Individual preview style features.""" 

251 

252 # NOTE: string_processing requires wrap_long_dict_values_in_parens 

253 # for https://github.com/psf/black/issues/3117 to be fixed. 

254 string_processing = auto() 

255 hug_parens_with_braces_and_square_brackets = auto() 

256 wrap_comprehension_in = auto() 

257 simplify_power_operator_hugging = auto() 

258 wrap_long_dict_values_in_parens = auto() 

259 fix_if_guard_explosion_in_case_statement = auto() 

260 

261 

262UNSTABLE_FEATURES: set[Preview] = { 

263 # Many issues, see summary in https://github.com/psf/black/issues/4208 

264 Preview.string_processing, 

265 # See issue #4036 (crash), #4098, #4099 (proposed tweaks) 

266 Preview.hug_parens_with_braces_and_square_brackets, 

267} 

268 

269 

270_MAX_CACHE_KEY_PART_LENGTH: Final = 32 

271 

272 

273@dataclass 

274class Mode: 

275 target_versions: set[TargetVersion] = field(default_factory=set) 

276 line_length: int = DEFAULT_LINE_LENGTH 

277 string_normalization: bool = True 

278 is_pyi: bool = False 

279 is_ipynb: bool = False 

280 skip_source_first_line: bool = False 

281 magic_trailing_comma: bool = True 

282 python_cell_magics: set[str] = field(default_factory=set) 

283 preview: bool = False 

284 unstable: bool = False 

285 enabled_features: set[Preview] = field(default_factory=set) 

286 

287 def __contains__(self, feature: Preview) -> bool: 

288 """ 

289 Provide `Preview.FEATURE in Mode` syntax that mirrors the ``preview`` flag. 

290 

291 In unstable mode, all features are enabled. In preview mode, all features 

292 except those in UNSTABLE_FEATURES are enabled. Any features in 

293 `self.enabled_features` are also enabled. 

294 """ 

295 if self.unstable: 

296 return True 

297 if feature in self.enabled_features: 

298 return True 

299 return self.preview and feature not in UNSTABLE_FEATURES 

300 

301 def get_cache_key(self) -> str: 

302 if self.target_versions: 

303 version_str = ",".join( 

304 str(version.value) 

305 for version in sorted(self.target_versions, key=attrgetter("value")) 

306 ) 

307 else: 

308 version_str = "-" 

309 if len(version_str) > _MAX_CACHE_KEY_PART_LENGTH: 

310 version_str = sha256(version_str.encode()).hexdigest()[ 

311 :_MAX_CACHE_KEY_PART_LENGTH 

312 ] 

313 features_and_magics = ( 

314 ",".join(sorted(f.name for f in self.enabled_features)) 

315 + "@" 

316 + ",".join(sorted(self.python_cell_magics)) 

317 ) 

318 features_and_magics = sha256(features_and_magics.encode()).hexdigest()[ 

319 :_MAX_CACHE_KEY_PART_LENGTH 

320 ] 

321 parts = [ 

322 version_str, 

323 str(self.line_length), 

324 str(int(self.string_normalization)), 

325 str(int(self.is_pyi)), 

326 str(int(self.is_ipynb)), 

327 str(int(self.skip_source_first_line)), 

328 str(int(self.magic_trailing_comma)), 

329 str(int(self.preview)), 

330 str(int(self.unstable)), 

331 features_and_magics, 

332 ] 

333 return ".".join(parts) 

334 

335 def __hash__(self) -> int: 

336 return hash(( 

337 frozenset(self.target_versions), 

338 self.line_length, 

339 self.string_normalization, 

340 self.is_pyi, 

341 self.is_ipynb, 

342 self.skip_source_first_line, 

343 self.magic_trailing_comma, 

344 frozenset(self.python_cell_magics), 

345 self.preview, 

346 self.unstable, 

347 frozenset(self.enabled_features), 

348 ))