Modernize code to Python 3.6+ and some cleanup

04-text-byte/charfinder/cf.py

@@ -8,7 +8,7 @@ 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):    
+    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>

04-text-byte/default_encodings.py

@@ -18,4 +18,4 @@ my_file = open('dummy', 'w')
 
 for expression in expressions.split():
     value = eval(expression)
-    print(expression.rjust(30), '->', repr(value))
+    print(f'{expression:>30} -> {value!r}')

04-text-byte/numerics_demo.py

@@ -7,12 +7,12 @@ re_digit = re.compile(r'\d')
 sample = '1\xbc\xb2\u0969\u136b\u216b\u2466\u2480\u3285'
 
 for char in sample:
-    print('U+%04x' % ord(char),                       # <1>
+    print(f'U+{ord(char):04x}',                       # <1>
           char.center(6),                             # <2>
           're_dig' if re_digit.match(char) else '-',  # <3>
           'isdig' if char.isdigit() else '-',         # <4>
           'isnum' if char.isnumeric() else '-',       # <5>
-          format(unicodedata.numeric(char), '5.2f'),  # <6>
+          f'{unicodedata.numeric(char):5.2f}',        # <6>
           unicodedata.name(char),                     # <7>
           sep='\t')
 # end::NUMERICS_DEMO[]

04-text-byte/ramanujan.py

@@ -11,7 +11,7 @@ text_str = ("Ramanujan saw \u0be7\u0bed\u0be8\u0bef"  # <3>
 
 text_bytes = text_str.encode('utf_8')  # <5>
 
-print('Text', repr(text_str), sep='\n  ')
+print(f'Text\n  {text_str!r}')
 print('Numbers')
 print('  str  :', re_numbers_str.findall(text_str))      # <6>
 print('  bytes:', re_numbers_bytes.findall(text_bytes))  # <7>

04-text-byte/sanitize.py

@@ -1,4 +1,3 @@
-
 """
 Radical folding and text sanitizing.