# HG changeset patch
# User Jeff Hammel <k0scist@gmail.com>
# Date 1425444957 28800
# Node ID 570ceafeb67099fd002c2368084d6c983b7270f5
# Parent  f6d885adb3d7708e07d12b8e0e14c5f933a2539b
STUB: numerics/text_display.py

diff -r f6d885adb3d7 -r 570ceafeb670 numerics/text_display.py
--- a/numerics/text_display.py	Tue Mar 03 20:23:34 2015 -0800
+++ b/numerics/text_display.py	Tue Mar 03 20:55:57 2015 -0800
@@ -7,21 +7,24 @@
 
 # imports
 import argparse
+import sys
+from collections import OrderedDict
+from math import floor
 
 # module globals
-__all__ = ['main', 'frac', 'FracParser']
+__all__ = ['main', 'blocks', 'frac', 'FracParser']
 
 # Unicode is awesome; see http://www.alanwood.net/unicode/block_elements.html
-blocks = {0.: '',
-          0.125: '▏',
-          0.25: None, # TODO,
-          0.375: None,
-          0.5: None,
-          0.625: None,
-          0.75: None,
-          0.875: None,
-          1.: '█'
-      }
+blocks = OrderedDict([(0.,    ''),
+                      (0.125, '▏'),
+                      (0.25,  '▎'),
+                      (0.375, '▍'),
+                      (0.5,   '▌'),
+                      (0.625, '▋'),
+                      (0.75,  '▊'),
+                      (0.875, '▉'),
+                      (1.,    '█'),
+                  ])
 
 
 def iterable(obj):
@@ -34,14 +37,25 @@
         return False
 
 
-def frac(fractions, width=20, bar='│'):
+def frac(fractions, width=20, bar=''):
     """display fractions"""
     if not iterable(fractions):
         # convert single item to list
         fractions = [fractions]
     retval = []
     for fraction in fractions:
-        raise NotImplementedError('TODO') # -> record TODO items
+        whole = int(floor(fraction*width))
+        part = (fraction*width)-whole
+        line = blocks[1.]*whole + blocks[int(floor(part * 8))/8.]
+        retval.append(line)
+    if bar:
+        lines = []
+        for line in retval:
+            newline = "{bar}{}{bar}".format(line.ljust(width),
+                                            bar=bar)
+            lines.append(newline)
+        retval = lines
+    return retval
 
 
 class FracParser(argparse.ArgumentParser):
@@ -50,10 +64,10 @@
         kwargs.setdefault('formatter_class', argparse.RawTextHelpFormatter)
         kwargs.setdefault('description', __doc__)
         argparse.ArgumentParser.__init__(self, **kwargs)
-        self.add_argument('fraction', type=float, nargs='+'
+        self.add_argument('fraction', type=float, nargs='+',
                           help="fractions to display")
         self.add_argument('-w', '--width', dest='width',
-                          type=int, default=20,
+                          type=int, default=40,
                           help="width to display [DEFAULT: %(default)s]")
         self.options = None
 
@@ -68,7 +82,7 @@
         if options.width < 1:
             self.error("Width must be greater than zero (You gave: {})".format(options.width))
         out_of_range = [i for i in options.fraction
-                        if not (0. < i < 1.)]
+                        if not (0. <= i <= 1.)]
         if out_of_range:
             self.error("Fractions should be between 0 and 1")
 
@@ -79,6 +93,11 @@
     parser = FracParser()
     options = parser.parse_args(args)
 
+    # get fractions display
+    lines = frac(options.fraction, width=options.width)
+
+    # display
+    print ('\n'.join(lines))
 
 if __name__ == '__main__':
     main()