pydoc.py: TypeError with a $LINES defined to anything

[arigo]

BPO	22314
Nosy	@arigo, @serhiy-storchaka
Files	pydoc_ttypager_lines.patch

^{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 2014-11-27.22:55:05.990>
created_at = <Date 2014-08-31.13:17:07.429>
labels = ['type-bug', 'library']
title = 'pydoc.py: TypeError with a $LINES defined to anything'
updated_at = <Date 2014-11-27.22:55:05.989>
user = 'https://github.com/arigo'

bugs.python.org fields:

activity = <Date 2014-11-27.22:55:05.989>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2014-11-27.22:55:05.990>
closer = 'serhiy.storchaka'
components = ['Library (Lib)']
creation = <Date 2014-08-31.13:17:07.429>
creator = 'arigo'
dependencies = []
files = ['37219']
hgrepos = []
issue_num = 22314
keywords = ['patch']
message_count = 3.0
messages = ['226177', '231310', '231785']
nosy_count = 3.0
nosy_names = ['arigo', 'python-dev', 'serhiy.storchaka']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue22314'
versions = ['Python 2.7', 'Python 3.4', 'Python 3.5']

[arigo]

$ LINES=20 python Lib/test/test_pydoc.py

...
File ".../Lib/pydoc.py", line 1448, in ttypager
r = inc = os.environ.get('LINES', 25) - 1
TypeError: unsupported operand type(s) for -: 'str' and 'int'

duh.

[serhiy-storchaka]

Here is a patch.

[python-dev]

New changeset 50808dffd0bb by Serhiy Storchaka in branch '2.7':
Issue bpo-22314: pydoc now works when the LINES environment variable is set.
https://hg.python.org/cpython/rev/50808dffd0bb

New changeset c6182a7e75fa by Serhiy Storchaka in branch '3.4':
Issue bpo-22314: pydoc now works when the LINES environment variable is set.
https://hg.python.org/cpython/rev/c6182a7e75fa

New changeset c8adee8a0ccb by Serhiy Storchaka in branch 'default':
Issue bpo-22314: pydoc now works when the LINES environment variable is set.
https://hg.python.org/cpython/rev/c8adee8a0ccb