break up layers and change index of layers (PaddlePaddle#970)

* break up layers and change index of layers

* prettify script

doc/fluid/api_cn/layers-breakdown.py

@@ -0,0 +1,73 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+"""
+Created on Tue Jun 25 21:36:04 2019
+
+
+break down layers_cn to its sub categories
+
+@author: haowang101779990
+"""
+
+import sys
+import os
+import re
+
+stdi,stdo,stde=sys.stdin,sys.stdout,sys.stderr 
+reload(sys)
+sys.stdin,sys.stdout,sys.stderr=stdi,stdo,stde 
+sys.setdefaultencoding('utf-8')
+
+srcfile=open("layers_cn.rst",'r')
+srclines=srcfile.readlines()
+srcfile.close()
+
+titles={}
+
+i=0
+while i <len(srclines):
+
+    if re.match(r'^=+$', srclines[i])!=None:
+
+        title=""
+        base_idx=i+1
+
+        for j in range(base_idx,len(srclines)):
+
+            if re.match(r'^=+$', srclines[j])!=None:
+                title="".join(srclines[base_idx:j])
+                title=title.strip().replace('\n','')
+                titles[title]=(i,j)
+                i=j+1
+                break
+
+    else:
+        i+=1
+
+titlines=titles.values()
+titlines.sort()
+
+if not os.path.isdir("./layers_cn"):
+    os.mkdir("layers_cn")
+
+for i in range(0,len(titlines)):
+    for key in titles.keys():
+        if(titles[key]==titlines[i]):
+
+            keyf=open("layers_cn/"+key+"_cn.rst",'w')
+
+            #title for this file
+            for _ in range(0,len(key)+5):
+                keyf.write("=")
+            keyf.write("\n"+key+"\n")
+            for _ in range(0,len(key)+5):
+                keyf.write("=")
+            keyf.write("\n")
+
+            #write into file
+            if i==len(titlines)-1:
+                keyf.write("".join(srclines[titlines[i][1]+1:]))
+            else:     
+                keyf.write("".join(srclines[titlines[i][1]+1:titlines[i+1][0]]))
+
+            keyf.close()