inspect.getsource() examines incorrect target

[GrzegorzKraso]

BPO	40317
Nosy	@ammaraskar, @tirkarthi
Superseder	bpo-35113: inspect.getsource returns incorrect source for classes when class definition is part of multiline strings
Files	demo.py: Example

^{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 2020-04-29.03:37:05.722>
created_at = <Date 2020-04-18.11:50:37.511>
labels = ['type-bug', 'library', '3.9']
title = 'inspect.getsource() examines incorrect target'
updated_at = <Date 2020-04-29.03:37:05.720>
user = 'https://bugs.python.org/GrzegorzKraso'

bugs.python.org fields:

activity = <Date 2020-04-29.03:37:05.720>
actor = 'xtreak'
assignee = 'none'
closed = True
closed_date = <Date 2020-04-29.03:37:05.722>
closer = 'xtreak'
components = ['Library (Lib)']
creation = <Date 2020-04-18.11:50:37.511>
creator = 'Grzegorz Kraso\xc5\x84'
dependencies = []
files = ['49072']
hgrepos = []
issue_num = 40317
keywords = []
message_count = 5.0
messages = ['366701', '366719', '366728', '367579', '367619']
nosy_count = 3.0
nosy_names = ['Grzegorz Kraso\xc5\x84', 'ammar2', 'xtreak']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '35113'
type = 'behavior'
url = 'https://bugs.python.org/issue40317'
versions = ['Python 3.9']

[GrzegorzKraso]

Based on the attached example:

Expected output:

123
    class Number:
        payload = 123

321
    class Number:
        payload = 321

Actual output:

123
    class Number:
        payload = 123

321
    class Number:
        payload = 123

Reproduced using:

• Python 2.7.17
• Python 3.7.7
• Python 3.8.2

[tirkarthi]

This will be resolved hopefully resolved using #10307 . Using my patch on the reproducer in the report.

./python bpo-40317.py
123
class Number:
payload = 123

321
class Number:
payload = 321

[tirkarthi]

Fixed in master now with 696136b . This includes the change of show decorators for classes too to make it consistent with functions so it's not backported.

[ammaraskar]

Did you mean to close this Karthik?

[tirkarthi]

yes, thanks Ammar. Thanks Grzegorz for the report.