Disabling warnings about members not existing by default

prospector/config/__init__.py

@@ -105,19 +105,21 @@ def _get_profile(self, path, config):
             profile_name = 'default'
             extra_profiles = []
 
-            if config.doc_warnings is not None and config.doc_warnings:
-                cmdline_implicit.append('doc_warnings')
-            if config.test_warnings is not None and config.test_warnings:
-                cmdline_implicit.append('test_warnings')
-            if config.no_style_warnings is not None and config.no_style_warnings:
-                cmdline_implicit.append('no_pep8')
-            if config.full_pep8 is not None and config.full_pep8:
-                cmdline_implicit.append('full_pep8')
-
-            # Use the strictness profile only if no profile has been given
-            if config.strictness is not None and config.strictness:
-                cmdline_implicit.append('strictness_%s' % config.strictness)
-                strictness = config.strictness
+        if config.doc_warnings is not None and config.doc_warnings:
+            cmdline_implicit.append('doc_warnings')
+        if config.test_warnings is not None and config.test_warnings:
+            cmdline_implicit.append('test_warnings')
+        if config.no_style_warnings is not None and config.no_style_warnings:
+            cmdline_implicit.append('no_pep8')
+        if config.full_pep8 is not None and config.full_pep8:
+            cmdline_implicit.append('full_pep8')
+        if config.member_warnings is not None and config.member_warnings:
+            cmdline_implicit.append('member_warnings')
+
+        # Use the strictness profile only if no profile has been given
+        if config.strictness is not None and config.strictness:
+            cmdline_implicit.append('strictness_%s' % config.strictness)
+            strictness = config.strictness
 
         # the profile path is
         #   * anything provided as an argument

prospector/config/configuration.py

@@ -24,6 +24,7 @@ def build_manager():
     manager.add(soc.BooleanSetting('doc_warnings', default=None))
     manager.add(soc.BooleanSetting('test_warnings', default=None))
     manager.add(soc.BooleanSetting('no_style_warnings', default=None))
+    manager.add(soc.BooleanSetting('member_warnings', default=None))
     manager.add(soc.BooleanSetting('full_pep8', default=None))
     manager.add(soc.IntegerSetting('max_line_length', default=None))
 
@@ -137,6 +138,12 @@ def build_command_line_source(prog=None, description='Performs static analysis o
             'help': 'Don\'t create any warnings about style. This disables the'
                     ' PEP8 tool and similar checks for formatting.',
         },
+        'member_warnings': {
+            'flags': ['-m', '--member-warnings'],
+            'help': 'Attempt to warn when code tries to access an attribute of a '
+                    'class or member of a module which does not exist. This is disabled '
+                    'by default as it tends to be quite inaccurate.'
+        },
         'full_pep8': {
             'flags': ['-F', '--full-pep8'],
             'help': 'Enables every PEP8 warning, so that all PEP8 style'

prospector/profiles/profile.py

@@ -26,6 +26,7 @@ def __init__(self, name, profile_dict, inherit_order):
         self.ignore_patterns = profile_dict.get('ignore-patterns', []) + profile_dict.get('ignore', [])
 
         self.output_format = profile_dict.get('output-format')
+        self.member_warnings = profile_dict.get('member-warnings')
         self.autodetect = profile_dict.get('autodetect')
         self.uses = [uses for uses in _ensure_list(profile_dict.get('uses', [])) if uses in ('django', 'celery')]
         self.max_line_length = profile_dict.get('max-line-length')
@@ -63,7 +64,8 @@ def as_dict(self):
             'output-format': self.output_format,
             'autodetect': self.autodetect,
             'uses': self.uses,
-            'max-line-length': self.max_line_length
+            'max-line-length': self.max_line_length,
+            'member-warnings': self.member_warnings,
         }
         for tool in TOOLS.keys():
             out[tool] = getattr(self, tool)
@@ -146,7 +148,8 @@ def _merge_profile_dict(priority, base):
     out = dict(base.items())
 
     for key, value in priority.items():
-        if key in ('strictness', 'doc-warnings', 'test-warnings', 'output-format', 'autodetect', 'max-line-length'):
+        if key in ('strictness', 'doc-warnings', 'test-warnings', 'member-warnings',
+                   'output-format', 'autodetect', 'max-line-length',):
             # some keys are simple values which are overwritten
             out[key] = value
         elif key in ('ignore', 'ignore-patterns', 'ignore-paths', 'uses'):
@@ -193,6 +196,13 @@ def _determine_test_warnings(profile_dict):
     return (None if test_warnings else 'no_test_warnings'), True
 
 
+def _determine_member_warnings(profile_dict):
+    member_warnings = profile_dict.get('member-warnings')
+    if member_warnings is None:
+        return None, False
+    return ('member_warnings' if member_warnings else 'no_member_warnings'), True
+
+
 def _determine_implicit_inherits(profile_dict, already_inherits, shorthands_found):
     # Note: the ordering is very important here - the earlier items
     # in the list have precedence over the later items. The point of
@@ -202,7 +212,8 @@ def _determine_implicit_inherits(profile_dict, already_inherits, shorthands_foun
         ('pep8', _determine_pep8(profile_dict)),
         ('docs', _determine_doc_warnings(profile_dict)),
         ('tests', _determine_test_warnings(profile_dict)),
-        ('strictness', _determine_strictness(profile_dict, already_inherits))
+        ('strictness', _determine_strictness(profile_dict, already_inherits)),
+        ('members', _determine_member_warnings(profile_dict)),
     ]
     inherits = []
 
@@ -236,6 +247,9 @@ def _load_and_merge(name_or_path, profile_path, allow_shorthand=True, forced_inh
         if 'docs' not in shorthands_found:
             data, inherit_list = _append_profiles('no_doc_warnings', profile_path, data, inherit_list)
 
+        if 'members' not in shorthands_found:
+            data, inherit_list = _append_profiles('no_member_warnings', profile_path, data, inherit_list)
+
         if 'tests' not in shorthands_found:
             data, inherit_list = _append_profiles('no_test_warnings', profile_path, data, inherit_list)
 

prospector/profiles/profiles/default.yaml

@@ -2,3 +2,4 @@ strictness: medium
 doc-warnings: false
 test-warnings: false
 autodetect: true
+member-warnings: false

prospector/profiles/profiles/member_warnings.yaml

@@ -0,0 +1,6 @@
+allow-shorthand: false
+
+pylint:
+  enable:
+    - no-member
+    - no-name-in-module

prospector/profiles/profiles/no_member_warnings.yaml

@@ -0,0 +1,6 @@
+allow-shorthand: false
+
+pylint:
+  disable:
+    - no-member
+    - no-name-in-module