print errors to stderr

7 files changed, 14 insertions, 7 deletions

diff --git a/src/python/example/alpha_complex_diagram_persistence_from_off_file_example.py b/src/python/example/alpha_complex_diagram_persistence_from_off_file_example.py
index 4079a469..6afaf533 100755
--- a/src/python/example/alpha_complex_diagram_persistence_from_off_file_example.py
+++ b/src/python/example/alpha_complex_diagram_persistence_from_off_file_example.py
@@ -2,6 +2,7 @@
 
 import argparse
 import matplotlib.pyplot as plot
+import sys
 import gudhi
 
 """ This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
@@ -64,6 +65,6 @@ with open(args.file, "r") as f:
             gudhi.plot_persistence_diagram(diag, band=args.band)
             plot.show()
     else:
-        print(args.file, "is not a valid OFF file")
+        print(args.file, "is not a valid OFF file", file=sys.stderr)
 
     f.close()
diff --git a/src/python/example/alpha_rips_persistence_bottleneck_distance.py b/src/python/example/alpha_rips_persistence_bottleneck_distance.py
index d5c33ec8..7b4aa3e7 100755
--- a/src/python/example/alpha_rips_persistence_bottleneck_distance.py
+++ b/src/python/example/alpha_rips_persistence_bottleneck_distance.py
@@ -3,6 +3,7 @@
 import gudhi
 import argparse
 import math
+import sys
 
 """ This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
     See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
@@ -100,6 +101,6 @@ with open(args.file, "r") as f:
         print(message)
 
     else:
-        print(args.file, "is not a valid OFF file")
+        print(args.file, "is not a valid OFF file", file=sys.stderr)
 
     f.close()
diff --git a/src/python/example/euclidean_strong_witness_complex_diagram_persistence_from_off_file_example.py b/src/python/example/euclidean_strong_witness_complex_diagram_persistence_from_off_file_example.py
index 4903667e..f61d692b 100755
--- a/src/python/example/euclidean_strong_witness_complex_diagram_persistence_from_off_file_example.py
+++ b/src/python/example/euclidean_strong_witness_complex_diagram_persistence_from_off_file_example.py
@@ -2,6 +2,7 @@
 
 import argparse
 import matplotlib.pyplot as plot
+import sys
 import gudhi
 
 """ This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
@@ -79,6 +80,6 @@ with open(args.file, "r") as f:
             gudhi.plot_persistence_diagram(diag, band=args.band)
             plot.show()
     else:
-        print(args.file, "is not a valid OFF file")
+        print(args.file, "is not a valid OFF file", file=sys.stderr)
 
     f.close()
diff --git a/src/python/example/euclidean_witness_complex_diagram_persistence_from_off_file_example.py b/src/python/example/euclidean_witness_complex_diagram_persistence_from_off_file_example.py
index 339a8577..aaa03dad 100755
--- a/src/python/example/euclidean_witness_complex_diagram_persistence_from_off_file_example.py
+++ b/src/python/example/euclidean_witness_complex_diagram_persistence_from_off_file_example.py
@@ -2,6 +2,7 @@
 
 import argparse
 import matplotlib.pyplot as plot
+import sys
 import gudhi
 
 """ This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
@@ -78,6 +79,6 @@ with open(args.file, "r") as f:
             gudhi.plot_persistence_diagram(diag, band=args.band)
             plot.show()
     else:
-        print(args.file, "is not a valid OFF file")
+        print(args.file, "is not a valid OFF file", file=sys.stderr)
 
     f.close()
diff --git a/src/python/example/periodic_cubical_complex_barcode_persistence_from_perseus_file_example.py b/src/python/example/periodic_cubical_complex_barcode_persistence_from_perseus_file_example.py
index c692e66f..97bfd49f 100755
--- a/src/python/example/periodic_cubical_complex_barcode_persistence_from_perseus_file_example.py
+++ b/src/python/example/periodic_cubical_complex_barcode_persistence_from_perseus_file_example.py
@@ -2,6 +2,7 @@
 
 import argparse
 import matplotlib.pyplot as plot
+import sys
 import gudhi
 
 """ This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
@@ -73,4 +74,4 @@ if is_file_perseus(args.file):
         gudhi.plot_persistence_barcode(diag)
         plot.show()
 else:
-    print(args.file, "is not a valid perseus style file")
+    print(args.file, "is not a valid perseus style file", file=sys.stderr)
diff --git a/src/python/example/rips_complex_diagram_persistence_from_off_file_example.py b/src/python/example/rips_complex_diagram_persistence_from_off_file_example.py
index c757aca7..5d8f057b 100755
--- a/src/python/example/rips_complex_diagram_persistence_from_off_file_example.py
+++ b/src/python/example/rips_complex_diagram_persistence_from_off_file_example.py
@@ -2,6 +2,7 @@
 
 import argparse
 import matplotlib.pyplot as plot
+import sys
 import gudhi
 
 """ This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
@@ -68,6 +69,6 @@ with open(args.file, "r") as f:
             gudhi.plot_persistence_diagram(diag, band=args.band)
             plot.show()
     else:
-        print(args.file, "is not a valid OFF file")
+        print(args.file, "is not a valid OFF file", file=sys.stderr)
 
     f.close()
diff --git a/src/python/example/tangential_complex_plain_homology_from_off_file_example.py b/src/python/example/tangential_complex_plain_homology_from_off_file_example.py
index f0df2189..77ac2ea7 100755
--- a/src/python/example/tangential_complex_plain_homology_from_off_file_example.py
+++ b/src/python/example/tangential_complex_plain_homology_from_off_file_example.py
@@ -2,6 +2,7 @@
 
 import argparse
 import matplotlib.pyplot as plot
+import sys
 import gudhi
 
 """ This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
@@ -60,6 +61,6 @@ with open(args.file, "r") as f:
             gudhi.plot_persistence_diagram(diag, band=args.band)
             plot.show()
     else:
-        print(args.file, "is not a valid OFF file")
+        print(args.file, "is not a valid OFF file", file=sys.stderr)
 
     f.close()