Brett Slatkin

Item 29: Guidance on variable leakage is no longer true

2

Reported by Mr. Kurokawa. This sentence and the preceding example: > It’s better not to leak loop variables, so I recommend using assignment expressions only in the condition part of...

This sentence on page 164: "However, these parameters are not required for object instance initialization." In the print version the word "object" is in fixed width font. But it shouldn't...

Item 74: Index assignment into bytes should use integer value instead of bytes value

2

Got this one via an email. Libor writes: > I have a small nitpick regarding bytes indexing - in the code example preceding paragraph starting "The bytearraytype...", you should also...

Item 24: Missing words in first sentence of item

1

From Nicholas via email: > 2. On page 94, you say "Sometimes you need to use a non-static type as a keyword argument's default value." This doesn't match the terminology...

Another reported by Toshi: ``` TypeError: open_picture() missing 1 required positional argument: 'profile_path' ``` There should be a line continuation character in there for the two lines of the stringified...

Reported by Toshi ``` Traceback ... UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb8 in position 0: invalid start byte ``` There should be one in there between the two lines...

Item #20: print with % format string instead of f-string

2

This code snippet: ``` try: result = careful_divide(x, y) except ValueError: print('Invalid inputs') else: print('Result is %.1f' % result) ``` The `print` at the end should be `print(f'Result is {result:.1f}')`

Page 82, Item 20, line 11 from top ``` try: return a / b except ZeroDivisionError as e: raise ValueError('Invalid inputs') ``` The "as e" isn't necessary anymore because of...

Page 37, Item 10, line 2 from top "I do this by fetching the count from the fruit_basket" should be read as "I do this by fetching the count from...

Once you know how far behind you are with #3, it'd be nice if a reader can elect to zip forward to sync with the writer and skip a bunch...