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all ASPN Products Recipes News Modules Mailing Lists The Perl Journal Reference ActivePython 2.4 docs advanced | search help Reference ActivePython 2.4 Helpful Resources Non-Programmer's Tutorial for Python Dive Into Python Python FAQs Python Enhancement Proposals (PEPs) PEP 0 -- Index of Python Enhancement Proposals (PEPs) PEP 1 -- PEP Purpose and Guidelines PEP 2 -- Procedure for Adding New Modules PEP 3 -- Guidelines for Handling Bug Reports PEP 4 -- Deprecation of Standard Modules PEP 5 -- Guidelines for Language Evolution PEP 6 -- Bug Fix Releases PEP 7 -- Style Guide for C Code PEP 8 -- Style Guide for Python Code PEP 9 -- Sample Plaintext PEP Template PEP 10 -- Voting Guidelines PEP 11 -- Removing support for little used platforms PEP 12 -- Sample reStructuredText PEP Template PEP 20 -- The Zen of Python PEP 42 -- Feature Requests PEP 100 -- Python Unicode Integration PEP 101 -- Doing Python Releases 101 PEP 102 -- Doing Python Micro Releases PEP 160 -- Python 1.6 Release Schedule PEP 200 -- Python 2.0 Release Schedule PEP 201 -- Lockstep Iteration PEP 202 -- List Comprehensions PEP 203 -- Augmented Assignments PEP 204 -- Range Literals PEP 205 -- Weak References PEP 206 -- Python Advanced Library PEP 207 -- Rich Comparisions PEP 208 -- Reworking the Coercion Model PEP 209 -- Multi-dimensional Arrays PEP 210 -- Decoupling the Interpreter Loop PEP 211 -- Adding A New Outer Product Operator PEP 212 -- Loop Counter Iteration PEP 213 -- Attribute Access Handlers PEP 214 -- Extended Print Statement PEP 215 -- String Interpolation PEP 216 -- Docstring Format PEP 217 -- Display Hook for Interactive Use PEP 218 -- Adding a Built-In Set Object Type PEP 219 -- Stackless Python PEP 220 -- Coroutines, Generators, Continuations PEP 221 -- Import As PEP 222 -- Web Library Enhancements PEP 223 -- Change the Meaning of \x Escapes PEP 224 -- Attribute Docstrings PEP 225 -- Elementwise/Objectwise Operators PEP 226 -- Python 2.1 Release Schedule PEP 227 -- Statically Nested Scopes PEP 228 -- Reworking Python's Numeric Model PEP 229 -- Using Distutils to Build Python PEP 230 -- Warning Framework PEP 231 -- findattr () PEP 232 -- Function Attributes PEP 233 -- Python Online Help PEP 234 -- Iterators PEP 235 -- Import on Case-Insensitive Platforms PEP 236 -- Back to the future PEP 237 -- Unifying Long Integers and Integers PEP 238 -- Changing the Division Operator PEP 239 -- Adding a Rational Type to Python PEP 240 -- Adding a Rational Literal to Python PEP 241 -- Metadata for Python Software Packages PEP 242 -- Numeric Kinds PEP 243 -- Module Repository Upload Mechanism PEP 244 -- The `directive' statement PEP 245 -- Python Interface Syntax PEP 246 -- Object Adaptation PEP 247 -- API for Cryptographic Hash Functions PEP 248 -- Python Database API Specification v1.0 PEP 249 -- Python Database API Specification v2.0 PEP 250 -- Using site-packages on Windows PEP 251 -- Python 2.2 Release Schedule PEP 252 -- Making Types Look More Like Classes PEP 253 -- Subtyping Built-in Types PEP 254 -- Making Classes Look More Like Types PEP 255 -- Simple Generators PEP 256 -- Docstring Processing System Framework PEP 257 -- Docstring Conventions PEP 258 -- Docutils Design Specification PEP 259 -- Omit printing newline after newline PEP 260 -- Simplify xrange() PEP 261 -- Support for "wide" Unicode characters PEP 262 -- A Database of Installed Python Packages PEP 0263 -- Defining Python Source Code Encodings PEP 264 -- Future statements in simulated shells PEP 265 -- Sorting Dictionaries by Value PEP 266 -- Optimizing Global Variable/Attribute Access PEP 267 -- Optimized Access to Module Namespaces PEP 268 -- Extended HTTP functionality and WebDAV PEP 269 -- Pgen Module for Python PEP 270 -- uniq method for list objects PEP 271 -- Prefixing sys.path by command line option PEP 272 -- API for Block Encryption Algorithms v1.0 PEP 273 -- Import Modules from Zip Archives PEP 274 -- Dict Comprehensions PEP 0275 -- Switching on Multiple Values PEP 276 -- Simple Iterator for ints PEP 277 -- Unicode file name support for Windows NT PEP 278 -- Universal Newline Support PEP 279 -- The enumerate() built-in function PEP 280 -- Optimizing access to globals PEP 281 -- Loop Counter Iteration with range and xrange PEP 282 -- A Logging System PEP 283 -- Python 2.3 Release Schedule PEP 284 -- Integer for-loops PEP 285 -- Adding a bool type PEP 286 -- Enhanced Argument Tuples PEP 287 -- reStructuredText Docstring Format PEP 288 -- Generators Attributes and Exceptions PEP 289 -- Generator Expressions PEP 290 -- Code Migration and Modernization PEP 291 -- Backward Compatibility for Standard Library PEP 292 -- Simpler String Substitutions PEP 293 -- Codec Error Handling Callbacks PEP 294 -- Type Names in the types Module PEP 295 -- Interpretation of multiline string constants PEP 296 -- Adding a bytes Object Type PEP 297 -- Support for System Upgrades PEP 298 -- The Locked Buffer Interface PEP 299 -- Special main () function in modules PEP 301 -- Package Index and Metadata for Distutils PEP 302 -- New Import Hooks PEP 303 -- Extend divmod() for Multiple Divisors PEP 304 -- Controlling Generation of Bytecode Files PEP 305 -- CSV File API PEP 306 -- How to Change Python's Grammar PEP 307 -- Extensions to the pickle protocol PEP 308 -- Conditional Expressions PEP 309 -- Partial Function Application PEP 310 -- Reliable Acquisition/Release Pairs PEP 311 -- Simplified Global Interpreter Lock Acquisition for Extensions PEP 312 -- Simple Implicit Lambda PEP 313 -- Adding Roman Numeral Literals to Python PEP 314 -- Metadata for Python Software Packages v1.1 PEP 315 -- Enhanced While Loop PEP 316 -- Programming by Contract for Python PEP 317 -- Eliminate Implicit Exception Instantiation PEP 318 -- Decorators for Functions and Methods PEP 319 -- Python Synchronize/Asynchronize Block PEP 320 -- Python 2.4 Release Schedule PEP 321 -- Date/Time Parsing and Formatting PEP 322 -- Reverse Iteration PEP 323 -- Copyable Iterators PEP 324 -- subprocess - New process module PEP 325 -- Resource-Release Support for Generators PEP 326 -- A Case for Top and Bottom Values PEP 327 -- Decimal Data Type PEP 328 -- Imports: Multi-Line and Absolute/Relative PEP 329 -- Treating Builtins as Constants in the Standard Library PEP 330 -- Python Bytecode Verification PEP 331 -- Locale-Independent Float/String Conversions PEP 332 -- Byte vectors and String/Unicode Unification PEP 333 -- Python Web Server Gateway Interface v1.0 PEP 334 -- Simple Coroutines via SuspendIteration PEP 335 -- Overloadable Boolean Operators PEP 336 -- Make None Callable PEP 337 -- Logging Usage in the Standard Library PEP 338 -- Executing modules as scripts PEP 339 -- Design of the CPython Compiler PEP 340 -- Anonymous Block Statements PEP 341 -- Unifying try-except and try-finally PEP 342 -- Coroutines via Enhanced Generators PEP 343 -- The "with" Statement PEP 344 -- Exception Chaining and Embedded Tracebacks PEP 345 -- Metadata for Python Software Packages 1.2 PEP 346 -- User Defined ("with") Statements PEP 347 -- Migrating the Python CVS to Subversion PEP 348 -- Exception Reorganization for Python 3.0 PEP 349 -- Allow str() to return unicode strings PEP 350 -- Codetags PEP 351 -- The freeze protocol PEP 352 -- Required Superclass for Exceptions PEP 353 -- Using ssize t as the index type PEP 354 -- Enumerations in Python PEP 355 -- Path - Object oriented filesystem paths PEP 356 -- Python 2.5 Release Schedule PEP 357 -- Allowing Any Object to be Used for Slicing PEP 358 -- The "bytes" Object PEP 359 -- The "make" Statement PEP 360 -- Externally Maintained Packages PEP 361 -- Python 2.6 Release Schedule PEP 362 -- Function Signature Object PEP 363 -- Syntax For Dynamic Attribute Access PEP 364 -- Transitioning to the Py3K Standard Library PEP 666 -- Reject Foolish Indentation PEP 754 -- IEEE 754 Floating Point Special Values PEP 3000 -- Python 3000 PEP 3001 -- Procedure for reviewing and improving standard library modules PEP 3002 -- Procedure for Backwards-Incompatible Changes PEP 3099 -- Things that will Not Change in Python 3000 PEP 3100 -- Miscellaneous Python 3.0 Plans PEP 3101 -- Advanced String Formatting PEP 3102 -- Keyword-Only Arguments PEP 3103 -- A Switch/Case Statement PEP 3104 -- Access to Names in Outer Scopes PEP 3105 -- Make print a function PEP 3106 -- Revamping dict.keys(), .values() and .items() PEP 3107 -- Function Annotations PEP 3108 -- Standard Library Reorganization PEP 3109 -- Raising Exceptions in Python 3000 PEP 3110 -- Catching Exceptions in Python 3000