Fix TrainsLogger doctest failing (switch to bypass mode in GitHub CI) (#1379)

* Fix TrainsLogger doctest failing (switch to bypass mode in GitHub CI)

* fix

* test ci

* debug

* debug CI

* Fix CircleCI

* Fix Any CI environment switch to bypass mode

* Removed debug prints

* Improve code coverage

* Improve code coverage

* Reverted

* Improve code coverage

* Test CI

* test codecov

* Codecov fix

* remove pragma

Co-authored-by: bmartinn <>

pytorch_lightning/loggers/trains.py

@@ -24,6 +24,7 @@ Use the logger anywhere in you LightningModule as follows:
 
 """
 from argparse import Namespace
+from os import environ
 from pathlib import Path
 from typing import Any, Dict, Optional, Union
 
@@ -58,9 +59,9 @@ class TrainsLogger(LightningLoggerBase):
             sent along side the task scalars. Defaults to True.
 
     Examples:
-        >>> logger = TrainsLogger("lightning_log", "my-test", output_uri=".")  # doctest: +ELLIPSIS
+        >>> logger = TrainsLogger("lightning_log", "my-lightning-test", output_uri=".")  # doctest: +ELLIPSIS
         TRAINS Task: ...
-        TRAINS results page: https://demoapp.trains.allegro.ai/.../log
+        TRAINS results page: ...
         >>> logger.log_metrics({"val_loss": 1.23}, step=0)
         >>> logger.log_text("sample test")
         sample test
@@ -69,7 +70,7 @@ class TrainsLogger(LightningLoggerBase):
         >>> logger.log_image("passed", "Image 1", np.random.randint(0, 255, (200, 150, 3), dtype=np.uint8))
     """
 
-    _bypass = False
+    _bypass = None
 
     def __init__(
             self,
@@ -83,8 +84,24 @@ class TrainsLogger(LightningLoggerBase):
             auto_resource_monitoring: bool = True
     ) -> None:
         super().__init__()
-        if self._bypass:
+        if self.bypass_mode():
             self._trains = None
+            print('TRAINS Task: running in bypass mode')
+            print('TRAINS results page: disabled')
+
+            class _TaskStub(object):
+                def __call__(self, *args, **kwargs):
+                    return self
+
+                def __getattr__(self, attr):
+                    if attr in ('name', 'id'):
+                        return ''
+                    return self
+
+                def __setattr__(self, attr, val):
+                    pass
+
+            self._trains = _TaskStub()
         else:
             self._trains = Task.init(
                 project_name=project_name,
@@ -114,8 +131,9 @@ class TrainsLogger(LightningLoggerBase):
         """
         ID is a uuid (string) representing this specific experiment in the entire system.
         """
-        if self._bypass or not self._trains:
+        if not self._trains:
             return None
+
         return self._trains.id
 
     @rank_zero_only
@@ -126,8 +144,8 @@ class TrainsLogger(LightningLoggerBase):
             params:
                 The hyperparameters that passed through the model.
         """
-        if self._bypass or not self._trains:
-            return None
+        if not self._trains:
+            return
         if not params:
             return
 
@@ -147,8 +165,8 @@ class TrainsLogger(LightningLoggerBase):
                 then the elements will be logged as "title" and "series" respectively.
             step: Step number at which the metrics should be recorded. Defaults to None.
         """
-        if self._bypass or not self._trains:
-            return None
+        if not self._trains:
+            return
 
         if not step:
             step = self._trains.get_last_iteration()
@@ -179,8 +197,8 @@ class TrainsLogger(LightningLoggerBase):
             value: The value to log.
             step: Step number at which the metrics should be recorded. Defaults to None.
         """
-        if self._bypass or not self._trains:
-            return None
+        if not self._trains:
+            return
 
         if not step:
             step = self._trains.get_last_iteration()
@@ -197,8 +215,12 @@ class TrainsLogger(LightningLoggerBase):
         Args:
             text: The value of the log (data-point).
         """
-        if self._bypass or not self._trains:
-            return None
+        if self.bypass_mode():
+            print(text)
+            return
+
+        if not self._trains:
+            return
 
         self._trains.get_logger().report_text(text)
 
@@ -222,8 +244,8 @@ class TrainsLogger(LightningLoggerBase):
             step:
                 Step number at which the metrics should be recorded. Defaults to None.
         """
-        if self._bypass or not self._trains:
-            return None
+        if not self._trains:
+            return
 
         if not step:
             step = self._trains.get_last_iteration()
@@ -265,8 +287,8 @@ class TrainsLogger(LightningLoggerBase):
                 If True local artifact will be deleted (only applies if artifact_object is a
                 local file). Defaults to False.
         """
-        if self._bypass or not self._trains:
-            return None
+        if not self._trains:
+            return
 
         self._trains.upload_artifact(
             name=name, artifact_object=artifact, metadata=metadata,
@@ -278,8 +300,9 @@ class TrainsLogger(LightningLoggerBase):
 
     @rank_zero_only
     def finalize(self, status: str = None) -> None:
-        if self._bypass or not self._trains:
-            return None
+        if self.bypass_mode() or not self._trains:
+            return
+
         self._trains.close()
         self._trains = None
 
@@ -288,14 +311,16 @@ class TrainsLogger(LightningLoggerBase):
         """
         Name is a human readable non-unique name (str) of the experiment.
         """
-        if self._bypass or not self._trains:
+        if not self._trains:
             return ''
+
         return self._trains.name
 
     @property
     def version(self) -> Union[str, None]:
-        if self._bypass or not self._trains:
+        if not self._trains:
             return None
+
         return self._trains.id
 
     @classmethod
@@ -327,9 +352,21 @@ class TrainsLogger(LightningLoggerBase):
         """
         cls._bypass = bypass
 
+    @classmethod
+    def bypass_mode(cls) -> bool:
+        """
+        bypass_mode returns the bypass mode state.
+        Notice GITHUB_ACTIONS env will automatically set bypass_mode to True
+        unless overridden specifically with set_bypass_mode(False)
+
+        :return: If True, all outside communication is skipped
+        """
+        return cls._bypass if cls._bypass is not None else bool(environ.get('CI'))
+
     def __getstate__(self) -> Union[str, None]:
-        if self._bypass or not self._trains:
+        if self.bypass_mode() or not self._trains:
             return ''
+
         return self._trains.id
 
     def __setstate__(self, state: str) -> None: