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  Pythonista Slack Chat
  posted

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  No one has replied

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  External editor on Winodws or Linux
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  AlexHevc

  Thanks @mikael .

  I would appreciate a method to edit scripts from windows or linux computer :)

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  anchor - UI constraints for Pythonista
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  mikael

  Convenient view alignment

  Enabled views have an align attribute that supports aligning matching attributes of views. For example, aligning the heights of two views:

  search_field.align.height(search_button)

  

  Using align is especially convenient when you need to align several views at once:

  view_a.align.center_x(view_b, view_c)

  In addition to all the regular constraint attributes like height and center_x in the examples above, align supports aligning the composite attributes size and center.

  Convenient view placement within superview

  Creating individual constraints can quickly become a bit of a bore. Thus the wrapper includes a number of methods for "docking" views.

  For example, the following places constraints to the top and both sides, leaving height still undefined:

  view.dock.top()

  

  Following docking methods are available:

  all, center, horizontal, vertical, horizontal_between, vertical_between, top, bottom, leading, trailing, top_leading, top_trailing, bottom_leading, bottom_trailing

  The most specialized of these are the _between methods, which dock the view to the sides in one direction, and between the two given views in another. Here's an example:

  result_area.dock.horizontal_between( search_button, done_button)

  

  By default, dock methods leave a margin between the edges of the superview and the view. This can be adjusted with the fit parameter:

  Dock.MARGIN (the default) - standard margin Dock.TIGHT - no margin Dock.SAFE - align to the safe area insets, if applicable

  You can also change the default by setting the Dock.default_fit parameter, e.g.:

  Dock.default_fit = Dock TIGHT

  Many dock methods support share and constant parameters.

  share parameter can be used to define how much of the superview's area the view should take:

  view.dock.top(share=.5)

  This is only exact if you use TIGHT fit, as there is no way to dynamically account for the space taken by margins.

  constant parameter can be used to adjust the margins manually, although I feel that this is probably bad layout design.

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  Getting/setting/observing sound volume?
  volume objcutil • posted

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  shinyformica

  Thanks, I'll try the key/value observer method.
  Gotta say it's awfully weird that Apple provided no reasonable API for this...at least for observing the value, if not setting it.

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  My code won’t work
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  JonB

  Scene is a little special. You must have a setup method, which returns once the scene is setup. Then, the engine calls update() or draw() at the fps rate. All scene methods should be written to exit quickly, as you don't actually directly change what is shown on screen -- instead the engine checks the state after update exits and renders the new positions on screen. Never use sleep, or have while True loops, etc, since that won't work the way you want.

  Instead, you need to think in terms of time, or actions.

  Take a look in your Examples folder, you will find a good game tutorial that walks you through a game in the scene module.

  In your case your while True statement means setup never exits, and the scene never starts.

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  Launching an app from Pythonista
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  cvp

  My God, I've just found this , thus I wasn't the first 😂

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  How do you insert new lines in the console editor?
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  No one has replied

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  Prevent duplicate launch from shortcut
  shortcuts home • posted

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  JonB

  hmm, it turns out when the view is not on the screen, even for panel, it is removed from the view heirarchy... this is different from what i remember.

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  Keyboard ui button.
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  shinya.ta

  @cvp

  Dear.cvp

  I didn't have a test because I didn't have time to try it.
  I'll take a test on the weekend.

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  Add Home Screen Shortcut with image from photos/local files/icloud drive/url
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  No one has replied

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  Installing the scp module via pip (in stash)
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  FarmerPaco

  @bennr01 just want to confirm that installing PyDrive via pip on raspbian downloads pyasn1 0.4.5

  This is not the same with pip in stash 7.1.

  But I honestly don’t know how much it matters.

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  What is pythonista?
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  JonB

  You will need to adapt your script a little for the pythonista environment. winsound is obviously a module for doing sound on Windows. Pythonista has a sound module that can play sounds, so you will maybe need to write a little mysound wrapper that provides a common interface if you want the same code to work both places

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  Has somebody already used PyDrive to access Google Drive files?
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  FarmerPaco

  @JonB thanks again for coming to the rescue (I remember you helped me with turtle2).

  Let me indicate what I did:

  1.installed PyDrive with Stash running in 2.7 which installed to Site packages 2. I realized this when I tried to run the following code in python 3.6

  from pydrive.auth import GoogleAuth from pydrive.drive import GoogleDrive import webbrowser # Create local webserver and auto handles authentication. # Standard webbrowser gave an error, JonB found the solution if not hasattr(webbrowser,'_open'): webbrowser._open=webbrowser.open def wbopen(url, *args,**kwargs): return webbrowser._open(url) webbrowser.open=wbopen gauth = GoogleAuth() gauth.LocalWebserverAuth() # upload drive = GoogleDrive(gauth) file1 = drive.CreateFile({'title': 'Hello.txt'}) # Create GoogleDriveFile instance with title 'Hello.txt'. file1.SetContentString('Hello World!') # Set content of the file from given string. file1.Upload() file1 = drive.CreateFile({'title': 'pyconnect.py'}) # Create GoogleDriveFile instance with title ... file1.SetContentFile('pyconnect.py') # Set content of the file from given file file1.Upload()

  and received an import error.

  Installed PyDrive again in stash running python 3.6. Now I have the PyDrive module in both site packages.

  Tried to run code and received an error in line 202 of the discovery.py dependency.
  I need to admit that I have not done a pip install of pyasn1 because the printout on the PyDrive install stated that the dependency was already there.

  I appreciate your help.
  Since I have PyDrive installed in both site packages. My questions are:

  1.Do I still need to reinstall pyasn1 like you did originally?

  @cvp is running PyDrive in python3. Can PyDrive by installed using stash running 3.6? I plan to use PyDrive in python3 exclusively. I use this for education. (Full disclosure: I am a lousy teacher and an even worse student).

  Why would I get a syntax error in discovery.py (which I am not even sure what it is.) Can I reinstall this modul again without errors from pip install?

  @shinyformica thanks for the offer for help. I will probably take you on it was I reach the authentication stage. I have already complete my google console step, downloaded the unknown file, remained and move to my current directory.

  Thank you everyone for taking time from your surely busy schedules to help me.
  Thank yo in advance for any further guidance.
  I want to install PyDrive on pythonista on my students so they can automate checking their work.

  Best,
  Justin

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  Cannot Add Shortcut
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  cvp

  @Tower 👍

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  Set files/folders read/write attributes in user Pythonista main folder
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  JonB

  To test pysandbox, simply create a test file, then try to delete it, or overwrite it.

  @omz is no longer supporting pythonista2, I doubt you will get a new option. (And since no one uses pythonista2 anymore, it wouldn't make much sense to to add those features to pythonista3). Plus, your whole premise is flawed to begin with ... If you have anything worth saving, you should be backing up.

  I will point out a middle ground which is this:. If you place unsafe files in the private folder, and del os.path.expanduser, and pathlib.Path.home, and sanitize sys.path, then you should be able to run untrusted code, since those files have no way of knowing how to find the shared folder. iOS prevents them from doing listdir in the parent of the app folder or group folder, so it is impossible for another app to find the files to delete (unless it is a script specifically targeting YOU. But if you are worried about that, you shouldn't ever take your iPad out of it's tin foil package to begin with)

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  Deploying pythonista scripts/bytecode to other users of pythonista
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  JonB

  In terms of how to package code -- gist is obviously the easiest, since it comes built into the app. Git is available in stash or the working copy app, and is another good way. A rarely used method is to create an executable url, which opens a script directly into the app. Some have made their modules available on pypi. You could also just zip the files up and place somewhere, with a one liner to install (see the stash GitHub repo for such an example)

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  Sticking a custom back button item into a NavigationView?
  navigationview • posted

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  shinyformica

  @cvp yeah...same here, no success with any of the things that seem like they should let me modify the back or left button items to something I am in control of.

  The good news is that @mikael 's pointer to the hidden notification works perfectly, so I'm good to go.

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  Reverse Geolocation works on console but not in code
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  oldCovfefe

  I finally found the issue. The code works fine on the main level of the app, but has these issue when triggered from a event handler (a function call from an action attribute). The following directive solves the issue:

  import location @ui.in_background def button_tapped(sender): location.start_updates() loc_dic = location.get_location() addr_dic = location.reverse_geocode(loc_dic) ...
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  popover_location and window title bars
  popover frame • posted

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  shinyformica

  @JonB true enough...double conversion isn't necessary, was just writing fast...here's a simplified version:

  def popoverPoint(topView, sourceView, pos): import objc_util x,y = pos srcobjc = sourceView.objc_instance topobjc = topView.objc_instance p = srcobjc.convertPoint_toView_(objc_util.CGPoint(x,y), topobjc.superview()) return (p.x,p.y)

  This is a popup to display a list of options to the user, so the popover has a TableView subview, and tapping an item in that view dismisses the popover. Working nicely now that it shows up where expected.

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  Access to pyObject() of ObjCInstance is crashy?
  objc • posted

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  shinyformica

  @JonB regardless of the troubles I was having...that objc decorator idea is brilliant, and ought to be rolled into objc_util.

  re: my problems with pyObject being crashy. After going over the way my code was executing, I rearranged things to be absolutely certain that all attempts to access internals via pyObject() and cast() were within a @on_main_thread...and that seemed to finally make it stable. So, though I'm not entirely clear where it was going wrong, somewhere at least one of those calls was being made outside the main thread, and was therefore making the whole thing unstable at any future call.