Python 3.4.3 64 bits is not "high dpi aware"

[ivb]

BPO	24390
Nosy	@amauryfa, @tjguk, @zware, @zooba, @csabella

^{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 2018-12-22.22:45:15.415>
created_at = <Date 2015-06-06.09:20:26.723>
labels = ['type-bug', 'invalid', 'OS-windows']
title = 'Python 3.4.3 64 bits is not "high dpi aware"'
updated_at = <Date 2018-12-22.22:45:15.414>
user = 'https://bugs.python.org/ivb'

bugs.python.org fields:

activity = <Date 2018-12-22.22:45:15.414>
actor = 'cheryl.sabella'
assignee = 'none'
closed = True
closed_date = <Date 2018-12-22.22:45:15.415>
closer = 'cheryl.sabella'
components = ['Windows']
creation = <Date 2015-06-06.09:20:26.723>
creator = 'ivb'
dependencies = []
files = []
hgrepos = []
issue_num = 24390
keywords = []
message_count = 6.0
messages = ['244894', '244995', '245053', '245054', '245058', '332374']
nosy_count = 6.0
nosy_names = ['amaury.forgeotdarc', 'tim.golden', 'ivb', 'zach.ware', 'steve.dower', 'cheryl.sabella']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue24390'
versions = ['Python 3.4', 'Python 3.5']

[ivb]

Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:44:40) [MSC v.1600 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> SM_CYSCREEN = 1
>>> from ctypes import windll
>>> GetSystemMetrics = windll.user32.GetSystemMetrics
>>> GetSystemMetrics(SM_CYSCREEN)
1067
>>> 'really this value is 1600'
>>> 'executable must be labeled as "high dpi aware"'

[ivb]

https://msdn.microsoft.com/en-us/library/windows/desktop/dn469266(v=vs.85).aspx#declaring_dpi_awareness

<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3" >
<asmv3:application>
<asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings"\>
<dpiAware>true</dpiAware>
</asmv3:windowsSettings>
</asmv3:application>
</assembly>

[ivb]

Python 3.5.0b2 (v3.5.0b2:7a088af5615b, May 31 2015, 06:22:19) [MSC v.1900 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import ctypes
>>> ctypes.windll.user32.GetSystemMetrics(1)
1067
>>> #must be 1600
>>> #Python 3.5 also affected

[amauryfa]

The Python program itself has no UI and cannot be marked as "DPI aware".

Instead, applications should call the win32 function "SetProcessDPIAwareness": https://msdn.microsoft.com/en-us/library/windows/desktop/dn302122

[ivb]

SetProcessDpiAwareness not available for Windows 7. For Windows 7 available SetProcessDPIAware, but:

Note SetProcessDPIAware is subject to a possible *race* *condition* if a DLL caches dpi settings during initialization. For this reason, it is recommended that dpi-aware be set through the application (.exe) *manifest* rather than by calling SetProcessDPIAware.

https://msdn.microsoft.com/en-us/library/windows/desktop/ms633543%28v=vs.85%29.aspx

[csabella]

IDLE added a call to the Windows API in bpo-33656. Other than that, as Amaury stated, there isn't any UI in Python, so closing this as not a bug.