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categories.py

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import sys

import collections

from unicodedata import category

def category_stats():

counts = collections.Counter()

firsts = {}

for code in range(sys.maxunicode + 1):

char = chr(code)

cat = category(char)

if cat not in counts:

firsts[cat] = char

counts[cat] += 1

return counts, firsts

def category_scan(desired):

for code in range(sys.maxunicode + 1):

char = chr(code)

if category(char) == desired:

yield char

def main(args):

count = 0

if len(args) == 2:

for char in category_scan(args[1]):

print(char, end=' ')

count += 1

if count > 200:

break

print()

print(count, 'characters shown')

else:

counts, firsts = category_stats()

for i, (cat, count) in enumerate(counts.most_common(), 1):

first = firsts[cat]

if cat == 'Cs':

first = f'(surrogate U+{ord(first):04X})'

print(f'{i:2} {count:6} {cat} {first}')

if __name__ == '__main__':

main(sys.argv)