remove tensorflow dependencies in DST module (#163)

* add 'book' in DST evaluation.

* Fix TRADE crosswoz training evaluation bug

* Add note on deploy

* rm TF dependencies & comment test output

Co-authored-by: zheng <zheng@zhangzheng-PC.lan>

convlab2/dst/trade/crosswoz/utils/logger.py

-# Code referenced from https://gist.github.com/gyglim/1f8dfb1b5c82627ae3efcfbbadb9f514
-import tensorflow as tf
-import numpy as np
-import scipy.misc 
-try:
-    from StringIO import StringIO  # Python 2.7
-except ImportError:
-    from io import BytesIO         # Python 3.x
-
-
-class Logger(object):
-    
-    def __init__(self, log_dir):
-        """Create a summary writer logging to log_dir."""
-        self.writer = tf.summary.FileWriter(log_dir)
-
-    def scalar_summary(self, tag, value, step):
-        """Log a scalar variable."""
-        summary = tf.Summary(value=[tf.Summary.Value(tag=tag, simple_value=value)])
-        self.writer.add_summary(summary, step)
-
-    def image_summary(self, tag, images, step):
-        """Log a list of images."""
-
-        img_summaries = []
-        for i, img in enumerate(images):
-            # Write the image to a string
-            try:
-                s = StringIO()
-            except:
-                s = BytesIO()
-            scipy.misc.toimage(img).save(s, format="png")
-
-            # Create an Image object
-            img_sum = tf.Summary.Image(encoded_image_string=s.getvalue(),
-                                       height=img.shape[0],
-                                       width=img.shape[1])
-            # Create a Summary value
-            img_summaries.append(tf.Summary.Value(tag='%s/%d' % (tag, i), image=img_sum))
-
-        # Create and write Summary
-        summary = tf.Summary(value=img_summaries)
-        self.writer.add_summary(summary, step)
-        
-    def histo_summary(self, tag, values, step, bins=1000):
-        """Log a histogram of the tensor of values."""
-
-        # Create a histogram using numpy
-        counts, bin_edges = np.histogram(values, bins=bins)
-
-        # Fill the fields of the histogram proto
-        hist = tf.HistogramProto()
-        hist.min = float(np.min(values))
-        hist.max = float(np.max(values))
-        hist.num = int(np.prod(values.shape))
-        hist.sum = float(np.sum(values))
-        hist.sum_squares = float(np.sum(values**2))
-
-        # Drop the start of the first bin
-        bin_edges = bin_edges[1:]
-
-        # Add bin edges and counts
-        for edge in bin_edges:
-            hist.bucket_limit.append(edge)
-        for c in counts:
-            hist.bucket.append(c)
-
-        # Create and write Summary
-        summary = tf.Summary(value=[tf.Summary.Value(tag=tag, histo=hist)])
-        self.writer.add_summary(summary, step)
-        self.writer.flush()
\ No newline at end of file

convlab2/dst/trade/multiwoz/utils/logger.py

-# Code referenced from https://gist.github.com/gyglim/1f8dfb1b5c82627ae3efcfbbadb9f514
-import tensorflow as tf
-import numpy as np
-import scipy.misc 
-try:
-    from StringIO import StringIO  # Python 2.7
-except ImportError:
-    from io import BytesIO         # Python 3.x
-
-
-class Logger(object):
-    
-    def __init__(self, log_dir):
-        """Create a summary writer logging to log_dir."""
-        self.writer = tf.summary.FileWriter(log_dir)
-
-    def scalar_summary(self, tag, value, step):
-        """Log a scalar variable."""
-        summary = tf.Summary(value=[tf.Summary.Value(tag=tag, simple_value=value)])
-        self.writer.add_summary(summary, step)
-
-    def image_summary(self, tag, images, step):
-        """Log a list of images."""
-
-        img_summaries = []
-        for i, img in enumerate(images):
-            # Write the image to a string
-            try:
-                s = StringIO()
-            except:
-                s = BytesIO()
-            scipy.misc.toimage(img).save(s, format="png")
-
-            # Create an Image object
-            img_sum = tf.Summary.Image(encoded_image_string=s.getvalue(),
-                                       height=img.shape[0],
-                                       width=img.shape[1])
-            # Create a Summary value
-            img_summaries.append(tf.Summary.Value(tag='%s/%d' % (tag, i), image=img_sum))
-
-        # Create and write Summary
-        summary = tf.Summary(value=img_summaries)
-        self.writer.add_summary(summary, step)
-        
-    def histo_summary(self, tag, values, step, bins=1000):
-        """Log a histogram of the tensor of values."""
-
-        # Create a histogram using numpy
-        counts, bin_edges = np.histogram(values, bins=bins)
-
-        # Fill the fields of the histogram proto
-        hist = tf.HistogramProto()
-        hist.min = float(np.min(values))
-        hist.max = float(np.max(values))
-        hist.num = int(np.prod(values.shape))
-        hist.sum = float(np.sum(values))
-        hist.sum_squares = float(np.sum(values**2))
-
-        # Drop the start of the first bin
-        bin_edges = bin_edges[1:]
-
-        # Add bin edges and counts
-        for edge in bin_edges:
-            hist.bucket_limit.append(edge)
-        for c in counts:
-            hist.bucket.append(c)
-
-        # Create and write Summary
-        summary = tf.Summary(value=[tf.Summary.Value(tag=tag, histo=hist)])
-        self.writer.add_summary(summary, step)
-        self.writer.flush()
\ No newline at end of file