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findCodePointsInClass.py
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findCodePointsInClass.py
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#!/usr/bin/env python3
#
# findCodePointsInClass.py: Display all Unicode chars in (any or no) category.
# 2022-10-04: Written by Steven J. DeRose.
#
import sys
import unicodedata
#import logging
#lg = logging.getLogger("findUnassignedCodePoints.py")
__metadata__ = {
"title" : "findUnassignedCodePoints",
"description" : "Display all Unicode chars in (any or no) category.",
"rightsHolder" : "Steven J. DeRose",
"creator" : "http://viaf.org/viaf/50334488",
"type" : "http://purl.org/dc/dcmitype/Software",
"language" : "Python 3.9",
"created" : "2022-10-04",
"modified" : "2023-11-23",
"publisher" : "http://github.com/sderose",
"license" : "https://creativecommons.org/licenses/by-sa/3.0/"
}
__version__ = __metadata__["modified"]
descr = """
=Name=
""" +__metadata__["title"] + ": " + __metadata__["description"] + """
=Description=
[superceded by showUnicodeCharsInClass.py]
==Usage==
findCodePointsInClass.py [options] [files]
Scan for characters that are in some one- or two-letter Unicode category.
By default, searches for category "Cn", "Unassigned".
Note: The following characters do not come back as unicodedata.category
"Unassigned", but seem to have "meta" names, and are kind of weird/special:
0080;<control>;Cc;0;BN;;;;;N;;;;;
0081;<control>;Cc;0;BN;;;;;N;;;;;
0084;<control>;Cc;0;BN;;;;;N;;;;;
0099;<control>;Cc;0;BN;;;;;N;;;;;
3400;<CJK Ideograph Extension A, First>;Lo;0;L;;;;;N;;;;;
4DB5;<CJK Ideograph Extension A, Last>;Lo;0;L;;;;;N;;;;;
4E00;<CJK Ideograph, First>;Lo;0;L;;;;;N;;;;;
9FCC;<CJK Ideograph, Last>;Lo;0;L;;;;;N;;;;;
AC00;<Hangul Syllable, First>;Lo;0;L;;;;;N;;;;;
D7A3;<Hangul Syllable, Last>;Lo;0;L;;;;;N;;;;;
D800;<Non Private Use High Surrogate, First>;Cs;0;L;;;;;N;;;;;
DB7F;<Non Private Use High Surrogate, Last>;Cs;0;L;;;;;N;;;;;
DB80;<Private Use High Surrogate, First>;Cs;0;L;;;;;N;;;;;
DBFF;<Private Use High Surrogate, Last>;Cs;0;L;;;;;N;;;;;
DC00;<Low Surrogate, First>;Cs;0;L;;;;;N;;;;;
DFFF;<Low Surrogate, Last>;Cs;0;L;;;;;N;;;;;
E000;<Private Use, First>;Co;0;L;;;;;N;;;;;
F8FF;<Private Use, Last>;Co;0;L;;;;;N;;;;;
The Private Use areas can also be considered an edge-case of "defined":
U+00E000–U+00F8FF
U+0F0000–U+0FFFFD
U+100000–U+10FFFD
=See also=
`showUnicodeCharsInClass.py` is a much better version.
=Known bugs and Limitations=
=To do=
=History=
* 2022-10-04: Written by Steven J. DeRose.
=Rights=
Copyright 2022-10-04 by Steven J. DeRose. This work is licensed under a
Creative Commons Attribution-Share-alike 3.0 unported license.
See [http://creativecommons.org/licenses/by-sa/3.0/] for more information.
For the most recent version, see [http://www.derose.net/steve/utilities]
or [https://github.com/sderose].
=Options=
"""
###############################################################################
# Main
#
if __name__ == "__main__":
import argparse
def anyInt(x:str) -> int:
try:
return int(x, 0)
except ValueError as e:
return e
def processOptions() -> argparse.Namespace:
try:
from BlockFormatter import BlockFormatter
parser = argparse.ArgumentParser(
description=descr, formatter_class=BlockFormatter)
except ImportError:
parser = argparse.ArgumentParser(description=descr)
parser.add_argument(
"--category", type=str, default="Cn",
help="Unicode category to search for.")
parser.add_argument(
"--group", action="store_true",
help="Report ranges, not just individual characters.")
parser.add_argument(
"--join", action="store_true",
help="Do not put each char/range on a separate line.")
parser.add_argument(
"--literal", action="store_true",
help="Also show the character as a literal.")
parser.add_argument(
"--max", type=anyInt, default=0xFFFF,
help="Last character to check.")
parser.add_argument(
"--min", type=anyInt, default=0x0000,
help="First character to check.")
parser.add_argument(
"--quiet", "-q", action="store_true",
help="Suppress most messages.")
parser.add_argument(
"--verbose", "-v", action="count", default=0,
help="Add more messages (repeatable).")
parser.add_argument(
"--version", action="version", version=__version__,
help="Display version information, then exit.")
args0 = parser.parse_args()
#if (lg and args0.verbose):
#logging.basicConfig(level=logging.INFO - args0.verbose)
return(args0)
def printSingleton(cp:int) -> None:
if (args.literal):
print("\\u%04x '%s'" % (cp, chr(cp)), end=ender)
else:
print("\\u%04x" % (cp), end=ender)
def printRange(cp1:int, cp2) -> None:
if (args.literal):
print("\\u%04x-\\u%04x '%s'-'%s'" %
(cp1, cp2, chr(cp1), chr(cp2)), end=ender)
else:
print("\\u%04x-\\u%04x" % (cp1, cp2), end=ender)
###########################################################################
#
args = processOptions()
if (len(args.category) < 1 or len(args.category) > 2 or
not args.category.istitle()):
sys.stderr.write("--category must be one or two letters.")
sys.exit()
ender = "\n"
if args.join: ender = ""
lastU = 0x0000
nFound = 0
for i in range(args.min, args.max+1):
ucat = unicodedata.category(chr(i))
if (ucat.startswith(args.category)):
nFound += 1
if (not args.group): printSingleton(i)
else:
if (args.group and lastU < i-1):
if (lastU+1 == i-1): printSingleton(i)
else: printRange(lastU+1, i-1)
lastU = i
if (args.group and lastU < i-1):
printRange(lastU+1, i-1)
print("")
print("*** Total code points in category '%s': %d." % (args.category, nFound))