solve ANSI escape sequences print error in cmd and powershell

Author: thisjiang

python/paddle/fluid/dygraph/varbase_patch_methods.py

@@ -16,6 +16,7 @@
 import numpy as np
 import warnings
 import weakref
+import sys
 
 import paddle
 from .. import framework
@@ -372,6 +373,9 @@ def grad(self):
         """
         msg = "tensor.grad will return the tensor value of the gradient."
         warning_msg = "\033[93m\nWarning:\n%s \033[0m" % (msg)
+        # ensure ANSI escape sequences print correctly in cmd and powershell
+        if sys.platform.lower() == 'win32':
+            warning_msg = "\nWarning:\n%s " % (msg)
         warnings.warn(warning_msg)
         return self._grad_ivar()
 

python/paddle/utils/deprecated.py

@@ -18,6 +18,7 @@
 import warnings
 import functools
 import paddle
+import sys
 
 __all__ = []
 
@@ -99,6 +100,10 @@ def wrapper(*args, **kwargs):
                     func.__module__, func.__name__))
 
             warningmsg = "\033[93m\nWarning:\n%s \033[0m" % (msg)
+            # ensure ANSI escape sequences print correctly in cmd and powershell
+            if sys.platform.lower() == 'win32':
+                warningmsg = "\nWarning:\n%s " % (msg)
+
             v_current = [int(i) for i in paddle.__version__.split(".")]
             v_current += [0] * (4 - len(v_current))
             v_since = [int(i) for i in _since.split(".")]