added no-refresh feature

config_parsing.py

@@ -22,7 +22,7 @@ def get_validated_config(filename):
                 { 
                     "name": str,
                     "command": str,
-                    "refresh": And(int, lambda n : n > 0),
+                    "refresh": And(int, lambda n : n >= 0),
                     Optional("prefix"): str,
                     "format": {
                         "align": Or("left", "center", "right"),

example_config.yml

@@ -53,8 +53,9 @@ bar:
       # text that will be displayed for this module. `date` here is used as an
       # example. THIS IS A REQUIRED FIELD.
       command: "date"
-      # How often to re-run the command and display the updated text. THIS IS A
-      # REQUIRED FIELD.
+      # How often (in milliseconds) to re-run the command and display the
+      # updated text. If this value is 0, then the module will not be
+      # refreshed. THIS IS A REQUIRED FIELD.
       refresh: 1000
       # Prefix to be printed before the text of the command.
       prefix: "DATE: "

main.py

@@ -36,6 +36,8 @@ def new_module_thread(alignment, pre, name, prefix, command, post, refresh):
         module_string = create_module_string(pre, prefix, command, post)
         running_modules_dict[alignment][name] = module_string
         print_bar()
+        if refresh == 0:
+            break
         sleep(refresh/1000)