Added signal catching and handling in C and Cython

python/obitools3/commands/stats.pyx

@@ -13,7 +13,8 @@ from functools import reduce
 import math
 import time
 import sys
- 
+from cpython.exc cimport PyErr_CheckSignals
+
 
 __title__="Compute basic statistics for attribute values."
 
@@ -164,6 +165,7 @@ def run(config):
     pb = ProgressBar(len(i_view), config, seconde=5)
     
     for i in range(len(i_view)):
+        PyErr_CheckSignals()
         pb(i)
         line = i_view[i]