diff --git a/01-good-old-times/tf-01.py b/01-good-old-times/tf-01.py old mode 100644 new mode 100755 diff --git a/07-infinite-mirror/tf-07.py b/07-infinite-mirror/tf-07.py old mode 100644 new mode 100755 diff --git a/15-dataspaces/tf-15.py b/15-dataspaces/tf-15.py old mode 100644 new mode 100755 diff --git a/28-lazy-rivers/tf-28.py b/28-lazy-rivers/tf-28.py old mode 100644 new mode 100755 diff --git a/32-reactive/tf-32.py b/32-reactive/tf-32.py old mode 100644 new mode 100755 diff --git a/32-reactive/util.py b/32-reactive/util.py old mode 100644 new mode 100755