Welcome, guest | Sign In | My Account | Store | Cart

Recipe 577818 revision 3 

#!/usr/bin/env python

"""
Print an highlighted version of string (POSIX only).

Author: Giampaolo Rodola' <g.rodola [AT] gmail [DOT] com>
License: MIT
"""

import sys


def _term_supports_colors(file=sys.stdout):
    try:
        import curses
        assert file.isatty()
        curses.setupterm()
        assert curses.tigetnum("colors") > 0
    except Exception:
        return False
    else:
        return True


if _term_supports_colors():
    def hilite(string, ok=True, bold=False):
        """Return an highlighted version of 'string'."""
        attr = []
        if ok is None:  # no color
            pass
        elif ok:   # green
            attr.append('32')
        else:   # red
            attr.append('31')
        if bold:
            attr.append('1')
        return '\x1b[%sm%s\x1b[0m' % (';'.join(attr), string)
else:
    hilite = lambda s, *args, **kwargs: s


if __name__ == '__main__':
    print hilite('hello')
    print hilite('hello', ok=False)
    print hilite('hello', ok=True, bold=True)
    print hilite('hello', ok=False, bold=True)
    print hilite('hello', ok=None, bold=False)
    print hilite('hello', ok=None, bold=True)

Diff to Previous Revision

--- revision 2 2012-01-30 20:14:14
+++ revision 3 2014-06-03 17:54:33
@@ -9,21 +9,35 @@
 
 import sys
 
-def hilite(string, ok=True, bold=False):
-    """Return an highlighted version of 'string'."""
-    attr = []
-    if ok is None:  # no color
-        pass
-    elif ok:   # green
-        attr.append('32')
-    else:   # red
-        attr.append('31')
-    if bold:
-        attr.append('1')
-    return '\x1b[%sm%s\x1b[0m' % (';'.join(attr), string)
 
-if not sys.stdout.isatty():  # not bound to a terminal
+def _term_supports_colors(file=sys.stdout):
+    try:
+        import curses
+        assert file.isatty()
+        curses.setupterm()
+        assert curses.tigetnum("colors") > 0
+    except Exception:
+        return False
+    else:
+        return True
+
+
+if _term_supports_colors():
+    def hilite(string, ok=True, bold=False):
+        """Return an highlighted version of 'string'."""
+        attr = []
+        if ok is None:  # no color
+            pass
+        elif ok:   # green
+            attr.append('32')
+        else:   # red
+            attr.append('31')
+        if bold:
+            attr.append('1')
+        return '\x1b[%sm%s\x1b[0m' % (';'.join(attr), string)
+else:
     hilite = lambda s, *args, **kwargs: s
+
 
 if __name__ == '__main__':
     print hilite('hello')

History