From 0c4178397782b99a77f1b71125d1dcda74b42aeb Mon Sep 17 00:00:00 2001
From: aweers <32593524+aweers@users.noreply.github.com>
Date: Thu, 25 Apr 2019 17:22:12 +0200
Subject: [PATCH 1/4] Add example for LR scheduler

A short and simple example, especially for new users. It helps for a general understanding on how to use this callback. Open for feedback and suggestions. ;)
---
 tensorflow/python/keras/callbacks.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tensorflow/python/keras/callbacks.py b/tensorflow/python/keras/callbacks.py
index 8d33bb22978..7db9fae5f3b 100644
--- a/tensorflow/python/keras/callbacks.py
+++ b/tensorflow/python/keras/callbacks.py
@@ -1168,6 +1168,23 @@ class LearningRateScheduler(Callback):
           (integer, indexed from 0) and returns a new
           learning rate as output (float).
       verbose: int. 0: quiet, 1: update messages.
+  
+  ```python
+  # Firstly, let's create a function which 
+  # maps a given epoch to a learning rate.
+  # This function would keep the learning rate 
+  # constant at 0.001 for the first ten epochs and  
+  # let it decrease exponentially after that.
+  def scheduler(epoch):
+    if epoch < 10:
+      return 0.001
+    else:
+      return 0.001 * tf.math.exp(0.1 * (10 - epoch))
+  # Next, we need to set up the callback and train the model.
+  callback = tf.keras.callbacks.LearningRateScheduler(scheduler)
+  model.fit(data, labels, epochs=100, callbacks=[callback], 
+            validation_data=(val_data, val_labels))
+  ```
   """
 
   def __init__(self, schedule, verbose=0):

From 1662bdc253e86036b2df1890dc8d807ea077d571 Mon Sep 17 00:00:00 2001
From: aweers <32593524+aweers@users.noreply.github.com>
Date: Fri, 26 Apr 2019 19:26:02 +0200
Subject: [PATCH 2/4] Rephrase a commentand delete one

Suggestions from @rchao
---
 tensorflow/python/keras/callbacks.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tensorflow/python/keras/callbacks.py b/tensorflow/python/keras/callbacks.py
index 7db9fae5f3b..6b01f314505 100644
--- a/tensorflow/python/keras/callbacks.py
+++ b/tensorflow/python/keras/callbacks.py
@@ -1172,15 +1172,15 @@ class LearningRateScheduler(Callback):
   ```python
   # Firstly, let's create a function which 
   # maps a given epoch to a learning rate.
-  # This function would keep the learning rate 
-  # constant at 0.001 for the first ten epochs and  
-  # let it decrease exponentially after that.
+  # This function keeps the learning rate 
+  # at 0.001 for the first ten epochs and  
+  # decreases it exponentially after that.
   def scheduler(epoch):
     if epoch < 10:
       return 0.001
     else:
       return 0.001 * tf.math.exp(0.1 * (10 - epoch))
-  # Next, we need to set up the callback and train the model.
+  
   callback = tf.keras.callbacks.LearningRateScheduler(scheduler)
   model.fit(data, labels, epochs=100, callbacks=[callback], 
             validation_data=(val_data, val_labels))

From 8deca6b4c84d225be38b81105fa0cdc47c22223b Mon Sep 17 00:00:00 2001
From: aweers <32593524+aweers@users.noreply.github.com>
Date: Sun, 28 Apr 2019 18:27:55 +0200
Subject: [PATCH 3/4] Removed unneccessary sentence

---
 tensorflow/python/keras/callbacks.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/tensorflow/python/keras/callbacks.py b/tensorflow/python/keras/callbacks.py
index 6b01f314505..29535918fa0 100644
--- a/tensorflow/python/keras/callbacks.py
+++ b/tensorflow/python/keras/callbacks.py
@@ -1170,8 +1170,6 @@ class LearningRateScheduler(Callback):
       verbose: int. 0: quiet, 1: update messages.
   
   ```python
-  # Firstly, let's create a function which 
-  # maps a given epoch to a learning rate.
   # This function keeps the learning rate 
   # at 0.001 for the first ten epochs and  
   # decreases it exponentially after that.

From cd1481f6eefb1328ea4d7996c35657578500026c Mon Sep 17 00:00:00 2001
From: aweers <32593524+aweers@users.noreply.github.com>
Date: Fri, 3 May 2019 16:38:55 +0200
Subject: [PATCH 4/4] Lines fit line limit now

---
 tensorflow/python/keras/callbacks.py | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tensorflow/python/keras/callbacks.py b/tensorflow/python/keras/callbacks.py
index 29535918fa0..e1e80a6b99a 100644
--- a/tensorflow/python/keras/callbacks.py
+++ b/tensorflow/python/keras/callbacks.py
@@ -1170,9 +1170,8 @@ class LearningRateScheduler(Callback):
       verbose: int. 0: quiet, 1: update messages.
   
   ```python
-  # This function keeps the learning rate 
-  # at 0.001 for the first ten epochs and  
-  # decreases it exponentially after that.
+  # This function keeps the learning rate at 0.001 for the first ten epochs 
+  # and decreases it exponentially after that.
   def scheduler(epoch):
     if epoch < 10:
       return 0.001