2.3.6.4 Error in append and extend descriptions

[arafin]

BPO	1641109
Nosy	@birkenfeld

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2007-01-22.08:20:03.000>
created_at = <Date 2007-01-21.23:34:30.000>
labels = ['invalid', 'docs']
title = '2.3.6.4 Error in append and extend descriptions'
updated_at = <Date 2007-01-22.08:20:03.000>
user = 'https://bugs.python.org/arafin'

bugs.python.org fields:

activity = <Date 2007-01-22.08:20:03.000>
actor = 'georg.brandl'
assignee = 'none'
closed = True
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2007-01-21.23:34:30.000>
creator = 'arafin'
dependencies = []
files = []
hgrepos = []
issue_num = 1641109
keywords = []
message_count = 2.0
messages = ['31071', '31072']
nosy_count = 2.0
nosy_names = ['georg.brandl', 'arafin']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1641109'
versions = []

[arafin]

2.3.6.4 Mutable Sequence Types (2.4.4 Python Doc)

Error in the table describing append and extend operations for the list type.

specificaly:

s.append(x) same as s[len(s):len(s)] = [x] (2)
s.extend(x) same as s[len(s):len(s)] = x (3)

should be:

s.append(x) same as s[len(s):len(s)] = x (2)
s.extend(x) same as s[len(s):len(s)] = [x] (3)

[birkenfeld]

Have you tried the original code and your corrections?
If you do, you'll find that the original is correct.

(In extend, x is already a sequence, so you mustn't wrap it in a list.
In append, you want only one element added, so you wrap x in a list.)