add tool for supervise python api

tools/check_api.py

@@ -0,0 +1,153 @@
+#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import sys
+import json
+import argparse
+import traceback
+import inspect
+import paddle.fluid as fluid
+
+
+def parse_args():
+    parser = argparse.ArgumentParser("Python API Check Tool.")
+    parser.add_argument(
+        '--op',
+        type=str,
+        default='check',
+        choices=['save', 'check'],
+        help='Operations to choose')
+    parser.add_argument(
+        '--dir',
+        type=str,
+        default='api_args',
+        help='Dir to save or load api infos.')
+    args = parser.parse_args()
+    return args
+
+
+def get_api_args(module):
+    '''Return Dict. keys: function/class.method
+                     values: dict of args info'''
+    # get global function's args 
+    args_dict = {}
+    funs = inspect.getmembers(module, inspect.isfunction)
+    for name, value in funs:
+        #tuple (args, varargs, keywords, defaults) is returned
+        tup = inspect.getargspec(value)
+        args_dict[name] = {
+            "args": tup[0],  #args is a list of the parameter names.  
+            "varargs": tup[1],  #varargs are the names of the * parameters
+            "keywords": tup[2],  #keywords are the names of the ** parameters
+            "defaults": str(tup[3])  #default values   
+        }
+    # get class method's args
+    cls = inspect.getmembers(module, inspect.isclass)
+    for cname, cvalue in cls:
+        if hasattr(module, '__all__') and cname not in module.__all__:
+            #exclude classes imported in
+            continue
+        for fname, fvalue in inspect.getmembers(cvalue, inspect.ismethod):
+            if fname.startswith('_') and fname != '__init__':
+                #ignore private methods of class, not including init method
+                continue
+            try:
+                tup = inspect.getargspec(fvalue)
+            except TypeError as e:
+                print fvalue, e
+                continue
+            args_dict['%s.%s' % (cname, fname)] = {
+                "args": tup[0],
+                "varargs": tup[1],
+                "keywords": tup[2],
+                "defaults": str(tup[3])
+            }
+    return args_dict
+
+
+def get_all_files(base_dir):
+    '''recursively traversing fluid directories to 
+         get all module files in fluid'''
+    file_list = []
+    for fpathe, dirs, fs in os.walk(base_dir):
+        for f in fs:
+            file_list.append(os.path.join(fpathe, f))
+    return file_list
+
+
+def save_api(module_str, dest_dir):
+    '''the output file's name is like 'fluid.layers.nn'
+       the content is a dict
+           key: function/class.method name
+           value: it's args info'''
+    try:
+        args_dict = get_api_args(eval(module_str))
+    except AttributeError as e:
+        print e
+        return
+    if not os.path.exists(dest_dir):
+        os.mkdir(dest_dir)
+    with open('%s/%s' % (dest_dir, module_str), 'w') as f:
+        f.write(json.dumps(args_dict))
+
+
+def check_api(module_str, dest_dir):
+    '''get current api's info, 
+        then compare with info loaded from saved'''
+    try:
+        args_dict = get_api_args(eval(module_str))
+    except AttributeError as e:
+        print e
+        return
+    with open('%s/%s' % (dest_dir, module_str), 'r') as f:
+        latest_args_dict = json.load(f)
+    if args_dict == latest_args_dict:
+        pass
+    else:
+        for k, v in args_dict.items():
+            # if a api added, KeyError occurs, should it be catched? 
+            if v != latest_args_dict[k]:
+                raise Exception("api changed: %s \nbefore: %s \nnow: %s" \
+                      %(k, latest_args_dict[k], v))
+        for k, v in latest_args_dict.items():
+            # if api removed, KeyError occurs, it be catched later. 
+            if v != args_dict[k]:
+                raise Exception("api changed: %s \nbefore: %s \nnow: %s" \
+                      %(k, latest_args_dict[k], v))
+
+
+if __name__ == '__main__':
+    base_dir = '../python/paddle/fluid/'
+    fail_list = []
+    for file_name in get_all_files(base_dir):
+        if file_name.split('/')[4] == 'tests':
+            continue
+        if file_name.split('/')[-1].endswith('__.py'):
+            continue
+        module_str = '.'.join(file_name.split('/')[3:])
+        module_str = '.'.join(module_str.split('.')[:-1])
+        print module_str
+        args = parse_args()
+        if args.op == 'save':
+            save_api(module_str, args.dir)
+        elif args.op == 'check':
+            try:
+                check_api(module_str, args.dir)
+            except Exception as e:
+                print "NOTE:", module_str, e
+                print traceback.format_exc()
+                fail_list.append(module_str)
+    if fail_list:
+        sys.exit(-1)