What's the purpose of tf.app.flags in TensorFlow?

Question

I am reading some example codes in Tensorflow, I found following code

flags = tf.app.flags
FLAGS = flags.FLAGS
flags.DEFINE_float(\'learning_rate\', 0.01, \         


        

Answer 1

After trying many times I found this to print all FLAGS key as well as actual value -

for key in tf.app.flags.FLAGS.flag_values_dict():

  print(key, FLAGS[key].value)