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@githubharald
githubharald / ctc_score.py
Created August 2, 2018 10:08
Compute confidence score for CTC-decoded text using TensorFlow
"""
Compute score for decoded text in a CTC-trained neural network using TensorFlow:
1. decode text with best path decoding (or some other decoder)
2. feed decoded text into loss function
3. loss is negative logarithm of probability
Example data: two time-steps, 2 labels (0, 1) and the blank label (2).
Decoding results in [0] (i.e. string containing one entry for label 0).
The probability is the sum over all paths yielding [0], these are: [0, 0], [0, 2], [2, 0]
with probability
@kunev
kunev / coroutines_example.py
Last active July 9, 2020 15:09
Coroutines example with python's asyncio module
import asyncio
@asyncio.coroutine
def open_file(name):
print("opening {}".format(name))
return open(name)
@asyncio.coroutine
def close_file(file):
print("closing {}".format(file.name))
@ceteri
ceteri / log.scala
Last active May 14, 2020 13:12
Intro to Apache Spark: code example for RDD animation
// load error messages from a log into memory
// then interactively search for various patterns
// base RDD
val lines = sc.textFile("log.txt")
// transformed RDDs
val errors = lines.filter(_.startsWith("ERROR"))
val messages = errors.map(_.split("\t")).map(r => r(1))
messages.cache()
@simonw
simonw / gist:7000493
Created October 15, 2013 23:53
How to use custom Python JSON serializers and deserializers to automatically roundtrip complex types.
import json, datetime
class RoundTripEncoder(json.JSONEncoder):
DATE_FORMAT = "%Y-%m-%d"
TIME_FORMAT = "%H:%M:%S"
def default(self, obj):
if isinstance(obj, datetime.datetime):
return {
"_type": "datetime",
"value": obj.strftime("%s %s" % (
@abhinav-upadhyay
abhinav-upadhyay / DateTimeDecoder.py
Last active September 10, 2024 19:58
A JSON decoder/encoder implementation for parsing dates as datetime objects in Python
#!/usr/bin/env python
# An example of decoding/encoding datetime values in JSON data in Python.
# Code adapted from: http://broadcast.oreilly.com/2009/05/pymotw-json.html
# Copyright (c) 2023, Abhinav Upadhyay
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met: