Code cleanup after #78 and tweak on blessed usage

- To prevent blinking cursors, do not re-store cursor locations
- Workaround sgr0 character issues (#32) again
- Misc: various style cleanups

gpustat/cli.py

@@ -2,6 +2,7 @@
 from __future__ import division
 from __future__ import print_function
 
+import os
 import sys
 import time
 
@@ -44,9 +45,12 @@ def loop_gpustat(interval=1.0, **kwargs):
         while 1:
             try:
                 query_start = time.time()
-                with term.location(0, 0):
-                    print_gpustat(eol_char=term.clear_eol + '\n', **kwargs)
-                    print(term.clear_eos, end='')
+
+                # Move cursor to (0, 0) but do not restore original cursor loc
+                print(term.move(0, 0), end='')
+                print_gpustat(eol_char=term.clear_eol + os.linesep, **kwargs)
+                print(term.clear_eos, end='')
+
                 query_duration = time.time() - query_start
                 sleep_duration = interval - query_duration
                 if sleep_duration > 0:

gpustat/core.py

@@ -32,6 +32,8 @@
 NOT_SUPPORTED = 'Not Supported'
 MB = 1024 * 1024
 
+IS_WINDOWS = 'windows' in platform.platform().lower()
+
 
 class GPUStat(object):
 
@@ -164,8 +166,11 @@ def print_to(self, fp,
                  show_power=None,
                  show_fan_speed=None,
                  gpuname_width=16,
-                 term=Terminal(),
+                 term=None,
                  ):
+        if term is None:
+            term = Terminal(stream=sys.stdout)
+
         # color settings
         colors = {}
 
@@ -345,7 +350,7 @@ def get_process_info(nv_process):
                     process['command'] = os.path.basename(_cmdline[0])
                     process['full_command'] = _cmdline
                 # Bytes to MBytes
-                # if drivers are not TTC this will be None. 
+                # if drivers are not TTC this will be None.
                 usedmem = nv_process.usedGpuMemory // MB if \
                           nv_process.usedGpuMemory else None
                 process['gpu_memory_usage'] = usedmem
@@ -476,9 +481,6 @@ def __repr__(self):
         s += '\n'.join('  ' + str(g) for g in self.gpus)
         s += '\n])'
         return s
-
-    def is_windows(self):
-        return 'windows' in platform.platform().lower()
 
     # --- Printing Functions ---
 
@@ -494,11 +496,10 @@ def print_formatted(self, fp=sys.stdout, force_color=False, no_color=False,
                              " be used at the same time")
 
         if force_color:
-            t_color = Terminal(kind='linux', force_styling=True)
+            t_color = Terminal(force_styling=True)
 
             # workaround of issue #32 (watch doesn't recognize sgr0 characters)
-            try: t_color.normal = u'\x1b[0;10m'
-            except: pass
+            t_color._normal = u'\x1b[0;10m'
         elif no_color:
             t_color = Terminal(force_styling=None)
         else:
@@ -510,10 +511,8 @@ def print_formatted(self, fp=sys.stdout, force_color=False, no_color=False,
 
         # header
         if show_header:
-            # no localization is available that easily
-            # however,everybody should be able understand the
-            # standard datetime string format %Y-%m-%d %H:%M:%S
-            if self.is_windows():
+            if IS_WINDOWS:
+                # no localization is available; just use a reasonable default
                 # same as str(timestr) but without ms
                 timestr = self.query_time.strftime('%Y-%m-%d %H:%M:%S')
             else: