raymondh

...joined 14 years ago, and has 2372 karma

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Highlights:

  * CEO of Mutable Minds, Inc. (a training and consulting company)
  * Python Distinguished Service Award
  * Past Python Software Foundation (PSF) board member
  * Private pilot (single engine land and sailplanes)
  * Certified Public Accountant
  * Certified Internal Auditor
  * Python Core Developer
  * Husband to Rachel
  * Father to Matthew
Python training video series, "Modern Python: Big Ideas, Little Code" available for free to Safari On-line subscribers: https://www.oreilly.com/library/view/modern-python-livelessons/9780134743400/

Videos for conference presentations and keynotes can be found at: https://www.youtube.com/playlist?list=PLRVdut2KPAguz3xcd22i_o_onnmDKj3MA

Contributions to Python:

  * any()
  * all()
  * enumerate()
  * local mapping argument to exec() can be any mapping
  * filter() -- originally itertools.ifilter
  * frozenset()
  * map() -- originally itertools.imap
  * reversed()
  * sum() -- optimized and made more accurate
  * zip() -- originally itertools.izip
  * sorted()
  * set()
  * dict.fromkeys
  * dict.pop
  * float.as_integer_ratio
  * str.format_map
  * str.partition
  * str.rpartition
  * tuple.count
  * tuple.index
  * abc.ABC
  * antigravity.geohash 
  * bisect module -- key function support
  * calendar module -- various fixups
  * collections.ChainMap
  * collections.Counter
  * collections.OrderedDict
  * collections.deque
  * collections.namedtuple
  * contextlib.redirect_stderr
  * contextlib.redirect_stdout
  * contextlib.suppress
  * decimal module
  * difflib.context_diff
  * difflib.unified_diff
  * fractions.limit_denominator -- with Mark Dickinson
  * functools.cache
  * functools.cmp_to_key
  * functools.lru_cache
  * functools.total_ordering
  * heapq.heappushpop
  * heapq.merge
  * heapq.nlargest
  * heapq.nsmallest
  * itertools.accumulate
  * itertools.chain
  * itertools.chain.from_iterable
  * itertools.combinations
  * itertools.combinations_with_replacement
  * itertools.compress
  * itertools.count
  * itertools.cycle
  * itertools.dropwhile
  * itertools.filterfalse
  * itertools.groupby
  * itertools.islice
  * itertools.pairwise
  * itertools.permutations
  * itertools.product
  * itertools.repeat
  * itertools.starmap
  * itertools.takewhile
  * itertools.tee
  * itertools.zip_longest
  * json.AttrDict (later removed)
  * math.dist
  * math.fsum -- with Mark Dickinson
  * math.hypot -- improve algorithm and expanded to n-dimensional case
  * math.log -- added the "base" optional argument
  * math.prod -- implemented by Pablo Galindo
  * operator.attrgetter
  * operator.itemgetter
  * queue.LifoQueue
  * queue.PriorityQueue
  * queue.join
  * queue.task_done
  * random's MersenneTwister
  * random.SystemRandom
  * random._randbelow
  * random.binomialvariate
  * random.choices
  * random.sample
  * random.triangular
  * statistics.correlation -- added spearman rank correlation coefficient
  * statistics.fmean
  * statistics.geometric_mean
  * statistics.harmonic_mean -- added weights parameter
  * statistics.linear_regression -- added direct proportion option
  * statistics.mode -- fixed api
  * statistics.multimode
  * statistics.NormalDist
  * statistics.quantiles
  * statistics.variance/pvariance/stdev/pstdev -- correctly ounded
  * tokenize.untokenize
  * userdict.DictMixin -- eventually became ollections.MutableMapping
  * __slots__ can be a dictionary
Designer of:

  * key-functions
  * generator expressions
  * compact and ordered dictionaries
  * the peephole optimizer
  * __length_hint__ optimization
  * the thousands separator (in string formatting)
  * original proponent of exception chaining
  * original proponent of sending data and exceptions into enerators
  * eval-loop opcode prediction
Maintainer of:

  * the argparse module (successor to Steven Bethard)
  * the bisect module
  * the collections module
  * the collections.abc module
  * the decimal module
  * the heapq module
  * the itertools module
  * the queue module
  * the random module
  * the statistics module (with Steven D'Aprano)
Author of:

  * Python How-to: Descriptor Guide
  * Python How-to: Sorting Techniques
  * Python tutorial: Looping Techniques
  * Python tutorial: Tour of the standard library
  * Python tutorial: Floating Point Arithmetic
  * Blog post: Super Considered Super
  * Whatsnew 3.1
  * Whatsnew 3.2
  * Whatsnew 3.8
Social media:

  * https://twitter.com/raymondh
  * https://rhettinger.wordpress.com/
  * https://www.facebook.com/raymondh
  * https://www.linkedin.com/in/raymondhettinger/
  * https://stackoverflow.com/users/1001643/raymond-hettinger