polish doc

paddle/fluid/operators/lstm_op.cc

@@ -184,19 +184,17 @@ Long-Short Term Memory (LSTM) Operator.
 The defalut implementation is diagonal/peephole connection
 (https://arxiv.org/pdf/1402.1128.pdf), the formula is as follows:
 
-$$
-i_t = \sigma(W_{ix}x_{t} + W_{ih}h_{t-1} + W_{ic}c_{t-1} + b_i) \\
+$$ i_t = \\sigma(W_{ix}x_{t} + W_{ih}h_{t-1} + W_{ic}c_{t-1} + b_i) $$
 
-f_t = \sigma(W_{fx}x_{t} + W_{fh}h_{t-1} + W_{fc}c_{t-1} + b_f) \\
+$$ f_t = \\sigma(W_{fx}x_{t} + W_{fh}h_{t-1} + W_{fc}c_{t-1} + b_f) $$
 
-\tilde{c_t} = act_g(W_{cx}x_t + W_{ch}h_{t-1} + b_c) \\
+$$ \\tilde{c_t} = act_g(W_{cx}x_t + W_{ch}h_{t-1} + b_c) $$
 
-o_t = \sigma(W_{ox}x_{t} + W_{oh}h_{t-1} + W_{oc}c_t + b_o) \\
+$$ o_t = \\sigma(W_{ox}x_{t} + W_{oh}h_{t-1} + W_{oc}c_t + b_o) $$
 
-c_t = f_t \odot c_{t-1} + i_t \odot \tilde{c_t} \\
+$$ c_t = f_t \\odot c_{t-1} + i_t \\odot \\tilde{c_t} $$
 
-h_t = o_t \odot act_h(c_t)
-$$
+$$ h_t = o_t \\odot act_h(c_t) $$
 
 - W terms denote weight matrices (e.g. $W_{xi}$ is the matrix
   of weights from the input gate to the input), $W_{ic}, W_{fc}, W_{oc}$

python/paddle/fluid/layers/layer_function_generator.py

@@ -49,6 +49,13 @@ _single_dollar_pattern_ = re.compile(r"\$([^\$]+)\$")
 _two_bang_pattern_ = re.compile(r"!!([^!]+)!!")
 
 
+def escape_math(text):
+    return _two_bang_pattern_.sub(
+        r'$$\1$$',
+        _single_dollar_pattern_.sub(r':math:`\1`',
+                                    _two_dollar_pattern_.sub(r"!!\1!!", text)))
+
+
 def _generate_doc_string_(op_proto):
     """
     Generate docstring by OpProto
@@ -60,12 +67,6 @@ def _generate_doc_string_(op_proto):
         str: the document string
     """
 
-    def escape_math(text):
-        return _two_bang_pattern_.sub(
-            r'$$\1$$',
-            _single_dollar_pattern_.sub(
-                r':math:`\1`', _two_dollar_pattern_.sub(r"!!\1!!", text)))
-
     if not isinstance(op_proto, framework_pb2.OpProto):
         raise TypeError("OpProto should be `framework_pb2.OpProto`")
 
@@ -233,9 +234,6 @@ def autodoc(comment=""):
     return __impl__
 
 
-_inline_math_single_dollar = re.compile(r"\$([^\$]+)\$")
-
-
 def templatedoc(op_type=None):
     """
     Decorator of layer function. It will use the docstring from the layer
@@ -253,9 +251,6 @@ def templatedoc(op_type=None):
     def trim_ending_dot(msg):
         return msg.rstrip('.')
 
-    def escape_inline_math(msg):
-        return _inline_math_single_dollar.sub(repl=r':math:`\1`', string=msg)
-
     def __impl__(func):
         if op_type is None:
             op_type_name = func.__name__
@@ -269,7 +264,7 @@ def templatedoc(op_type=None):
         for line in comment_lines:
             line = line.strip()
             if len(line) != 0:
-                comment += escape_inline_math(line)
+                comment += escape_math(line)
                 comment += " "
             elif len(comment) != 0:
                 comment += "\n    \n    "