updated chapter 4 and appendix-A files

04-text-byte/charfinder/cf.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+import sys
+import unicodedata
+
+FIRST, LAST = ord(' '), sys.maxunicode              # <1>
+
+
+def find(*query_words, first=FIRST, last=LAST):     # <2>
+    query = {w.upper() for w in query_words}        # <3>
+    count = 0
+    for code in range(first, last + 1):    
+        char = chr(code)                            # <4>
+        name = unicodedata.name(char, None)         # <5>
+        if name and query.issubset(name.split()):   # <6>
+            print(f'U+{code:04X}\t{char}\t{name}')  # <7>
+            count += 1
+    print(f'({count} found)')
+
+
+def main(words):
+    if words:
+        find(*words)
+    else:
+        print('Please provide words to find.')
+
+
+if __name__ == '__main__':
+    main(sys.argv[1:])