fix py3

test=develop

paddle/fluid/API.spec

@@ -417,8 +417,6 @@ paddle.reader.compose ArgSpec(args=[], varargs='readers', keywords='kwargs', def
 paddle.reader.chain ArgSpec(args=[], varargs='readers', keywords=None, defaults=None)
 paddle.reader.shuffle ArgSpec(args=['reader', 'buf_size'], varargs=None, keywords=None, defaults=None)
 paddle.reader.ComposeNotAligned.__init__ 
-paddle.reader.ComposeNotAligned.args.__init__ 
-paddle.reader.ComposeNotAligned.message.__init__ 
 paddle.reader.firstn ArgSpec(args=['reader', 'n'], varargs=None, keywords=None, defaults=None)
 paddle.reader.xmap_readers ArgSpec(args=['mapper', 'reader', 'process_num', 'buffer_size', 'order'], varargs=None, keywords=None, defaults=(False,))
 paddle.reader.PipeReader.__init__ ArgSpec(args=['self', 'command', 'bufsize', 'file_type'], varargs=None, keywords=None, defaults=(8192, 'plain'))

paddle/scripts/paddle_build.sh

@@ -459,6 +459,7 @@ function assert_api_not_changed() {
         # Use sed to make python2 and python3 sepc keeps the same
         sed -i 's/arg0: str/arg0: unicode/g' new.spec
         sed -i "s/\(.*Transpiler.*\).__init__ ArgSpec(args=\['self'].*/\1.__init__ /g" new.spec
+        sed -i 's/\(.*ComposeNotAligned.*\).__init__ ArgSpec(args=.*/\1.__init__ /g' new.spec
     fi
     python ${PADDLE_ROOT}/tools/diff_api.py ${PADDLE_ROOT}/paddle/fluid/API.spec new.spec
     deactivate

tools/print_signatures.py

@@ -30,7 +30,7 @@ member_dict = collections.OrderedDict()
 
 def visit_member(parent_name, member):
     cur_name = ".".join([parent_name, member.__name__])
-    if inspect.isclass(member) or inspect.isgetsetdescriptor(member):
+    if inspect.isclass(member):
         for name, value in inspect.getmembers(member):
             if hasattr(value, '__name__') and (not name.startswith("_") or
                                                name == "__init__"):
@@ -43,7 +43,8 @@ def visit_member(parent_name, member):
                 line.strip() for line in pydoc.render_doc(member).split('\n')
                 if "->" in line
             ])
-
+    elif inspect.isgetsetdescriptor(member):
+        return
     else:
         raise RuntimeError("Unsupported generate signature of member, type {0}".
                            format(str(type(member))))