Require isort on all Python files. (#8420)

demo/CLI/binary_classification/mknfold.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 
-import sys
 import random
+import sys
 
 if len(sys.argv) < 2:
     print ('Usage:<filename> <k> [nfold = 5]')

demo/CLI/regression/mknfold.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 
-import sys
 import random
+import sys
 
 if len(sys.argv) < 2:
     print('Usage:<filename> <k> [nfold = 5]')

demo/CLI/yearpredMSD/csv2libsvm.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 
 import sys
+
 fo = open(sys.argv[2], 'w')
 
 for l in open(sys.argv[1]):