construct a fake function and use ast.parse to extract the args (Padd…

…lePaddle#4456)

ci_scripts/check_api_parameters.py

@@ -19,6 +19,7 @@
 import re
 import sys
 import inspect
+import ast
 import paddle
 
 
@@ -61,15 +62,10 @@ def _check_params_in_description(rstfilename, paramstr):
     flag = True
     params_intitle = []
     if paramstr:
-        _params_intitle = paramstr.split(
-            ', '
-        )  # is there any parameter with default value of type list/tuple? may break this.
-        for s in _params_intitle:
-            if ':' in s:  # annotations
-                pname = s.split(':')
-                params_intitle.append(pname[0].strip())
-            else:
-                params_intitle.append(s.strip())
+        fake_func = ast.parse(f'def fake_func({paramstr}): pass')
+        for arg in fake_func.body[0].args.args:
+            params_intitle.append(arg.arg)
+
     funcdescnode = extract_params_desc_from_rst_file(rstfilename)
     if funcdescnode:
         items = funcdescnode.children[1].children[0].children