@dthomson You may want to look at this post.
https://forum.omz-software.com/topic/7014/how-to-refresh-dropbox-access-token-with-the-older-dropbox-library-included-with-pythonista/2
I installed dropbox version 11.7.0 a year ago and I appears to still be working today.

@cvp No problem. I thought maybe your question was intended for @mikeno.

@cvp I bought Pyto in 2019. I am currently running Pyto 17.1.1 I have tested barometer.py on iPhone 12 mini and iPad mini 4th gen.

@cvp Correct. After my morning brain fog cleared, that is what you said in your last edit. :-)

I dropped the 2nd parameter (error) because it caused an exception: "item 2 in argtypes has no from_param method", so I tried running without the error parameter.

After reading the last comment by @JonB I now understand the proper use of @Block witch can be called directly.

This works for me.

# coding: utf-8
from rubicon.objc import Block, ObjCClass, ObjCInstance, py_from_ns
from rubicon.objc.runtime import objc_id

pressure = None

@Block
def handler(altitudeData:ObjCInstance, err:ObjCInstance) -> None:
    nspressure = ObjCInstance(altitudeData).pressure
    global pressure
    pressure = py_from_ns(nspressure)

"""
def bhandler(_data) -> None:
    nspressure = ObjCInstance(_data).pressure
    global pressure
    pressure = py_from_ns(nspressure)

handler_block = Block(bhandler, None, (objc_id))
"""

def get_pressure():
    CMAltimeter = ObjCClass('CMAltimeter')
    NSOperationQueue = ObjCClass('NSOperationQueue')
    if not CMAltimeter.isRelativeAltitudeAvailable():
        print('This device has no barometer.')
        return
    altimeter = CMAltimeter.new()
    main_q = NSOperationQueue.mainQueue
    #altimeter.startRelativeAltitudeUpdatesToQueue_withHandler_(main_q, handler_block)
    altimeter.startRelativeAltitudeUpdatesToQueue_withHandler_(main_q, handler)
    print('Started altitude updates.')
    try:
        while pressure is None:
            pass
    finally:
        altimeter.stopRelativeAltitudeUpdates()
        print('Updates stopped.')
        return pressure

if __name__ == '__main__':
    result = get_pressure()
    print(result)
    del pressure

@mikeno This code works for me with the latest version of pyto.

# coding: utf-8
from rubicon.objc import Block, ObjCClass, ObjCInstance, py_from_ns
from rubicon.objc.runtime import objc_id

pressure = None

def handler(_data) -> None:
    nspressure = ObjCInstance(_data).pressure
    global pressure
    pressure = py_from_ns(nspressure)

handler_block = Block(handler, None, (objc_id))

def get_pressure():
    CMAltimeter = ObjCClass('CMAltimeter')
    NSOperationQueue = ObjCClass('NSOperationQueue')
    if not CMAltimeter.isRelativeAltitudeAvailable():
        print('This device has no barometer.')
        return
    altimeter = CMAltimeter.new()
    main_q = NSOperationQueue.mainQueue
    altimeter.startRelativeAltitudeUpdatesToQueue_withHandler_(main_q, handler_block)
    print('Started altitude updates.')
    try:
        while pressure is None:
            pass
    finally:
        altimeter.stopRelativeAltitudeUpdates()
        print('Updates stopped.')
        return pressure

if __name__ == '__main__':
    result = get_pressure()
    print(result)
    del pressure

This code works on my iPhone 12.

I added @ui.in_background to def select_author(sender)

I will also test the Lock code.

import ui
#
def show_list_dialog(items=None, *args, **kwargs):
    items = items or []
    tbl = ui.TableView(**kwargs)
    tbl.data_source = ui.ListDataSource(items)
    my_sel = {'value': None}
    class MyTableViewDelegate (object):
        def tableview_did_select(self, tableview, section, row):
            print('items:', tableview.data_source.items)
            print('section, row:', section, row)
            my_sel['value'] = tableview.data_source.items[row]
            tableview.close()
            print('in delegate: my_sel',my_sel['value'])
    tbl.delegate = MyTableViewDelegate()
    tbl.present(style='sheet')
    tbl.wait_modal()
    print('after wait: ', my_sel['value'])
    return my_sel['value']
#
w, h = ui.get_screen_size()
view = ui.View(name="Frank's Library", bg_color='lightblue', frame=(0, 0, w, h))
 
@ui.in_background 
def select_author(sender):
    author_unique = ['Baldacci,David', 'Barr,Nevada', 'Bartol,Amy', 'Bernt,Eric', 'Brandt,Kylie', 'Bruni,Riccardo', 'Bryndza,Robert', 'Burke,James Lee', 'Burton,Mary', 'Butcher,Jim', 'Carlson,Tucker', 'Carrol,Sean', 'Case,Andrew', 'Chernov,Ron', 'Clayton,MegWaite', 'Coben,Harlan', 'Cole,Bobby', 'Connelly,Michael', 'Cornwell,Bernard', 'Cornwell,Patricia', 'Cowie,Amber', 'Crombie,Deborah', 'Crosby,Ellen', 'Cross,Katie', 'Cussler,Clive', 'Delaney,Matthew B.J.', 'Dilts,Tyler', 'Dorsey,Tim']
    f = (0, 0, 400, 300)
    selected_author = show_list_dialog(author_unique, frame=f, name='Select an Author')
    print('list dialog returned:', selected_author)
    global author_result
    author_result.text = str(selected_author)
    return
 
author_button = ui.Button(title='Author', frame=(10,5,350,100), border_color='black', border_width=2, background_color='#EAECEE', action=select_author, font=('Arial Rounded MT Bold',18))
author_button.width=70
author_button.height=40
view.add_subview(author_button)
#
global author_result
author_entry=''
author_result = ui.TextView(name='author',frame=(100,5,250,40), border_color='black', border_width=3, text=author_entry, font=('Arial Rounded MT Bold',16))
view.add_subview(author_result)
 
view.present('sheet')
#nav_view = ui.NavigationView(view)
#nav_view.present('sheet')

@

@JonB Presenting the view directly without the nav view has the same issue on my iPhone 12. The first line in the console is after wait: None

This appears to be a problem only when running iOS 15 on an iPhone 12. The @JonB example runs fine on my iPad mini, but does not work on my iPhone 12 mini.

I have run into the same problem with some rubicon-objc code i developed.

# works on iPad, but fails on iPhone 12 mini
while self.ispresented:
    waituntil = NSDate.alloc().initWithTimeIntervalSinceNow(.2)
    runLoop = NSRunLoop.currentRunLoop
    runLoop.runUntilDate(waituntil)

Here are some links to others with a similar problem.
https://stackoverflow.com/questions/69312354/failed-to-block-main-thread-with-runloop-on-ios15-with-device-iphone12
https://developer.apple.com/forums/thread/691941

I have other Pythonista scripts that use modal_wait() that do seem to work, so maybe there is a work around

fixed underscore

Your_pyto_textview.__py_view__.TextView.objc_class.partial_methods.keys())