Add a new 'css' format, which further abbreviates base 1000 suffixes (e.g. 'k' instead of ' kb')

Author: eugenesvk

README.md

@@ -48,9 +48,10 @@ Default base if it is not clear what the unit is (i.e. if it is not 'mib' or 'me
 - format type:      `[hH][size_format][^exponent]`
     - `h`:              Base 1000
     - `H`:              Base 1024
-- `size_format`:    `c | cs | cv | e | ev | s | sv`
+- `size_format`:    `c | cs | css | cv | e | ev | s | sv`
     - `c`:              Commonly used case-sensitive suffixes 
     - `cs`:             Commonly used abbreviated case-sensitive suffixes
+    - `css`:            Similar to `cs` but even more abbreviated `Base 1000` (e.g. `k` instead of ` kb`)
     - `cv`:             Commonly used verbose case-sensitive suffixes
     - `e`:              IEC suffixes
     - `ev`:             IEC verbose suffixes

hfilesize/hfilesize.py

@@ -59,6 +59,31 @@ class Format:
 		],
 	}
 
+	casing_shorter = {
+		1024: [
+			'',
+			'K',
+			'M',
+			'G',
+			'T',
+			'P',
+			'E',
+			'Z',
+			'Y',
+		],
+		1000: [
+			'',
+			'k',
+			'm',
+			'g',
+			't',
+			'p',
+			'e',
+			'z',
+			'y',
+		],
+	}
+
 	casing_verbose = {
 		1024: [
 			(' byte', ' bytes'),
@@ -284,26 +309,27 @@ def __format__(self, fmt):
 		'''
 		format specification:
 			format type:	[hH][size_format][^exponent]
-			size_format:	c | cs | cv | e | ev | s | sv
-			exponent:		integer
+			size_format:	c | cs | css | cv | e | ev | s | sv
+			exponent:   		integer
 
 		base is required sometimes if no exponent is specified
 		always specifying the base gives a shorter format specification
 		'''
 		# is it an empty format or not a special format for the size class
-		matches = re.search(r'([hH])(?:(c|cs|cv|e|ev|s|sv)?(?:\^(\d+))?)?$', fmt)
+		matches = re.search(r'([hH])(?:(c|cs|css|cv|e|ev|s|sv)?(?:\^(\d+))?)?$', fmt)
 		if not matches:
 			return int(self).__format__(fmt)
 		fmt_type, size_fmt, exponent = matches.groups()
 		size_fmt = {
-			None:	Format.casing,
-			'c':	Format.casing,
-			'cs':	Format.casing_short,
-			'cv':	Format.casing_verbose,
-			'e':	Format.iec,
-			'ev':	Format.iec_verbose,
-			's':	Format.si,
-			'sv':	Format.si_verbose,
+			None: 	Format.casing,
+			'c':  	Format.casing,
+			'cs': 	Format.casing_short,
+			'css':	Format.casing_shorter,
+			'cv': 	Format.casing_verbose,
+			'e':  	Format.iec,
+			'ev': 	Format.iec_verbose,
+			's':  	Format.si,
+			'sv': 	Format.si_verbose,
 		}[size_fmt]
 		if fmt_type=='h':
 			base = 1000

setup.py

@@ -16,7 +16,7 @@
 
 setup(
 	name='hfilesize',
-	version='0.1.0',
+	version='0.2.0',
 	license='GPLv3',
 	description='Human Readable File Sizes',
 	long_description=long_description,