Michio JP

Michio JP

1565408101

TensorFlow vs. PyTorch vs. Keras for NLP

Before beginning a feature comparison between TensorFlow, PyTorch, and Keras, let’s cover some soft, non-competitive differences between them.

Non-competitive facts:

Below, we present some differences between the 3 that should serve as an introduction to TensorFlow, PyTorch, and Keras. These differences aren’t written in the spirit of comparing one with the other but with a spirit of introducing the subject of our discussion in this article.

TensorFlow

  • Created by Google
  • Version 1.0 in February 2017

PyTorch

  • Created by Facebook
  • Version 1.0 in October 2018
  • Based on Torch, another deep learning framework based on Lua

Keras

  • High-level API to simplify the complexity of deep learning frameworks
  • Runs on top of other deep learning APIs — TensorFlow, Theano, and CNTK
  • It is not a library on its own

Competitive differences of TensorFlow, PyTorch, and Keras:

Now let’s see more competitive facts about the 3 of them. We are specifically looking to do a comparative analysis of the frameworks focusing on Natural Language Processing.

1. Types of RNNs available

When looking for a deep learning solution to an NLP problem, Recurrent Neural Networks (RNNs) are the most popular go-to architecture for developers. Therefore, it makes sense to compare the frameworks from this perspective.

All of the frameworks under consideration have modules that allow us to create simple RNNs as well as their more evolved variants — Gated Recurrent Units (GRU) and Long Short Term Memory (LSTM) networks.

PyTorch:

PyTorch provides 2 levels of classes for building such recurrent networks:

  • **Multi-layer classes — nn.RNN, nn.GRU, and nn.LSTM. **Objects of these classes are capable of representing deep bidirectional recurrent neural networks.
  • **Cell-level classes — nn.RNNCell, nn.GRUCell, and nn.LSTMCell. **Objects of these classes can represent only a single cell (again, a simple RNN or LSTM or GRU cell) that can handle one timestep of the input data.

So, the multi-layer classes are like a nice wrapper to the cell-level classes for the times when we don’t want much customization within our neural network.

Also, making an RNN bi-directional is as simple as setting the bidirectional argument to True in the multi-layer classes!

TensorFlow:

TensorFlow provides us with a tf.nn.rnn_cell module to help us with our standard RNN needs.

Some of the most important classes in the tf.nn.rnn_cell module are as follows:

  • Cell level classes are used to define a single cell of the RNN, viz — BasicRNNCell , GRUCell and LSTMCell
  • MultiRNNCell class is used to stack the various cells to create deep RNNs
  • DropoutWrapper class is used to implement dropout regularization

Keras:

Below are the recurrent layers provided in the Keras library. Some of these layers are:

  • SimpleRNN — Fully-connected RNN where the output is to be fed back to input
  • GRU — Gated Recurrent Unit layer
  • LSTM — Long Short Term Memory layer

TensorFlow, PyTorch, and Keras have built-in capabilities to allow us to create popular RNN architectures. The difference lies in their interface.

Keras has a simple interface with a small list of well-defined parameters, which makes the above classes easy to implement. Being a high-level API on top of TensorFlow, we can say that Keras makes TensorFlow easy. While PyTorch provides a similar level of flexibility as TensorFlow, it has a much cleaner interface.

While we are on the subject, let’s dive deeper into a comparative study based on the ease of use for each framework.

**2. **Ease of use: TensorFlow vs. PyTorch vs. Keras

TensorFlow is often reprimanded over its incomprehensive API. PyTorch is way more friendly and simple to use. Overall, the PyTorch framework is more tightly integrated with Python language and feels more native most of the time. When you write in TensorFlow, sometimes you feel that your model is behind a brick wall with several tiny holes to communicate over.

Let’s discuss a few more factors comparing the three, based on their ease of use:

Static computational graphs vs. dynamic computational graphs:

This factor is especially important in NLP. TensorFlow uses static graphs for computation while PyTorch uses dynamic computation graphs.

This means that in Tensorflow, you define the computation graph statically before a model is run. All communication with the outer world is performed via tf.Session object and tf.Placeholder, which are tensors that will be substituted by external data at runtime.

In PyTorch, things are way more imperative and dynamic: you can define, change, and execute nodes as you go; no special session interfaces or placeholders.

In RNNs, with static graphs, the input sequence length will stay constant. This means that if you develop a sentiment analysis model for English sentences, you must fix the sentence length to some maximum value and pad all smaller sequences with zeros. Not too convenient, right?

Debugging:

Since the computation graph in PyTorch is defined at runtime, you can use our favorite Python debugging tools such as pdb, ipdb, PyCharm debugger, or old trusty print statements.

This is not the case with TensorFlow. You have an option to use a special tool called tfdbg, which allows you to evaluate TensorFlow expressions at runtime and browse all tensors and operations in session scope. Of course, you won’t be able to debug any python code with it, so it will be necessary to use pdb separately.

  • Community size:

Tensorflow is more mature than PyTorch. It has a much larger community as compared to PyTorch and Keras combined. Its user base is growing faster than both PyTorch and Keras.

So this means:

  • A larger StackOverFlow community to help with your problems
  • A larger set of online study materials — blogs, videos, courses, etc.
  • Faster adoption for the latest Deep Learning techniques

Future of NLP:

While Recurrent Neural Networks have been the “go-to” architecture for NLP tasks for a while now, it’s probably not going to be this way forever. We already have a newer transformer model based on the attention mechanism gaining popularity amongst the researchers.

It is already being hailed as the new NLP standard, replacing Recurrent Neural Networks. Some commentators believe that the Transformer will become the dominant NLP deep learning architecture of 2019.

Tensorflow seems to be ahead in this race:

  • First of all, attention-based architectures were introduced by Google itself.
  • Second, only TensorFlow has a stable release for Transformer architecture

This is not to say that PyTorch is far behind, many pre-trained transformer models are available at Huggingface’s GitHub: https://github.com/huggingface/pytorch-transformers.

So, that’s all about the comparison. But before parting ways, let me tell you about something that might make this whole conversation obsolete in 1 year!

TensorFlow 2.0

Google recently announced Tensorflow 2.0, and it is a game-changer!

Here’s how:

  • Going forward, Keras will be the high-level API for TensorFlow, and it’s extended so that you can use all the advanced features of TensorFlow directly from tf.keras. So, all of TensorFlow with Keras simplicity at every scale and with all hardware.
  • In TensorFlow 2.0, eager execution is now the default. You can take advantage of graphs even in eager context, which makes your debugging and prototyping easy, while the TensorFlow runtime takes care of performance and scaling under the hood.
  • TensorBoard integration with Keras, which is now a… one-liner!

So, that mitigates almost all the complaints that people have about TensorFlow, I guess. Which means that TensorFlow will consolidate its position as the go-to framework for all deep learning tasks and is even better now!

#machine-learning #data-science #python #tensorflow

What is GEEK

Buddha Community

TensorFlow vs. PyTorch vs. Keras for NLP
Hello Jay

Hello Jay

1594525380

Keras vs. Tensorflow - Difference Between Tensorflow and Keras

Keras and Tensorflow are two very popular deep learning frameworks. Deep Learning practitioners most widely use Keras and Tensorflow. Both of these frameworks have large community support. Both of these frameworks capture a major fraction of deep learning production.

Which framework is better for us then?

This blog will be focusing on Keras Vs Tensorflow. There are some differences between Keras and Tensorflow, which will help you choose between the two. We will provide you better insights on both these frameworks.

What is Keras?

Keras is a high-level API built on the top of a backend engine. The backend engine may be either TensorFlow, theano, or CNTK. It provides the ease to build neural networks without worrying about the backend implementation of tensors and optimization methods.

Fast prototyping allows for more experiments. Using Keras developers can convert their algorithms into results in less time. It provides an abstraction overs lower level computations.

Major Applications of Keras

  • The performance of Keras is smooth on both CPU and GPU.
  • Keras provides modularity, flexibility to code, extensibility, and has an adaptation for innovation and research.
  • The pythonic nature of Keras makes it easy to explore and debug the code.

What is Tensorflow?

Tensorflow is a tool designed by Google for the deep learning developer community. The aim of TensorFlow was to make deep learning applications accessible to the people. It is an open-source library available on Github. It is one of the most famous libraries to experiment with deep learning. The popularity of TensorFlow is because of the ease of building and deployment of neural net models.

Major area of focus here is numerical computation. It was built keeping the processing computation power in mind. Therefore we can run TensorFlow applications on almost kind of computer.

Major applications of Tensorflow

  • From mobiles to embedded devices and distributed servers Tensorflow runs on all the platforms.
  • Tensorflow is the enterprise of solving real-world and real-time problems like image analysis, robotics, generating data, and NLP.
  • Developers are implementing tools for translation languages and the detection of skin cancers using Tensorflow.
  • Major projects using TensorFlow are Google translate, video detection, image recognition.

#keras tutorials #keras vs tensorflow #keras #tensorflow

Pytorch vs Tensorflow vs Keras | Deep Learning Tutorial (Tensorflow, Keras & Python)

We will go over what is the difference between pytorch, tensorflow and keras in this video. Pytorch and Tensorflow are two most popular deep learning frameworks. Pytorch is by facebook and Tensorflow is by Google. Keras is not a full fledge deep learning framework, it is just a wrapper around Tensorflow that provides some convenient APIs.

#pytorch #tensorflow #keras #python #deep-learning

Ikram Mihan

Ikram Mihan

1600333481

Keras vs Tensorflow vs Pytorch

Keras vs Tensorflow vs Pytorch

Deep learning is a subset of Artificial Intelligence (AI), a field growing popularly over the last several decades. Deep learning and machine learning are part of the artificial intelligence family, though deep learning is also a subset of machine learning.

It imitates the human brain’s neural pathways in processing data, using it for decision-making, detecting objects, recognizing speech, and translating languages. It learns without human supervision or intervention, pulling from unstructured and unlabeled data.

Deep learning processes machine learning by using a hierarchical level of artificial neural networks, built like the human brain, with neuron nodes connecting in a web. While traditional machine learning programs work with data analysis linearly, deep learning’s hierarchical function lets machines process data using a nonlinear approach.

Keras,  TensorFlow and Pytorch are the three most popular deep learning frameworks. Let’s learn in detail each of these three.

#keras #tensorflow #pytorch #python

Gunjan  Khaitan

Gunjan Khaitan

1612013729

Keras vs TensorFlow vs Pytorch | Deep Learning Frameworks Comparison 2021

With the Deep Learning scene being dominated by three main frameworks, it is very easy to get confused on which one to use? In this video on Keras vs Tensorflow vs Pytorch, we will clear all your doubts on which framework is better and which framework should be used by beginners, intermediates and professionals.

The topics covered in this video are :

  • 00:00:00 What is Keras, Tensorflow and Pytorch?
  • 00:05:27 Differences beteen Keras, tensorflow and Pytorch
  • 00:11:46 Which framework should you use?

#keras #tensorflow #pytorch #deep-learning

Husam Abdullah

1597049711

Keras vs PyTorch vs Caffe - Comparing the Implementation of CNN

In today’s world, Artificial Intelligence is imbibed in the majority of the business operations and quite easy to deploy because of the advanced deep learning frameworks. These deep learning frameworks provide the high-level programming interface which helps us in designing our deep learning models. Using deep learning frameworks, it reduces the work of developers by providing inbuilt libraries which allows us to build models more quickly and easily.

In this article, we will build the same deep learning framework that will be a convolutional neural network for image classification on the same dataset in Keras, PyTorch and Caffe and we will compare the implementation in all these ways. Finally, we will see how the CNN model built in PyTorch outperforms the peers built-in Keras and Caffe.

  • Topics covered in this article
  • How to choose Deep learning frameworks.
  • Pros and cons of Keras
  • Pros and cons of Pytorch
  • Pros and cons of Caffe
  • Hands-on implementation of the CNN model in Keras, Pytorch & Caffe.

#caffe #deep learning #keras #pytorch #tensorflow