🌐 Mailman 3 July 2019 - Python-list - python.org

load extention spatialite in sqlite on windows
by MICHAEL LANE July 10, 2019

July 10, 2019

Hi, I tried to reproduce this(https://geoalchemy-2.readthedocs.io/en/latest/spatialite_tutorial.html) in windows. How can I do that? I'm using Windows 10, my project use Pyramid Framework with Python 3.6.8. Even though I put the dll file in a directory defined in %PATH% or try with/without full path, with/without file extension, with '//' or '\', with libspatialite-4.dll or using excute with all combination mentionned before... dbapi_conn.execute("SELECT load_extension('mod_spatialite.dll')") For example i tried this kind of combinaison: def load_spatialite(dbapi_conn, connection_record): dbapi_conn.load_extension('C:\\mydll\\mod_spatialite.dll') # dbapi_conn.load_extension('C:\\mydll\\libspatialite-4.dll') # dbapi_conn.load_extension('mod_spatialite') # dbapi_conn.load_extension('mod_spatialite.dll') # dbapi_conn.execute("SELECT load_extension('C:\\mydll\\mod_spatialite.dll')") # dbapi_conn.execute("SELECT load_extension('mod_spatialite.dll')") # dbapi_conn.execute("SELECT load_extension('mod_spatialite')") # dbapi_conn.load_extension('C:/mydll\mod_spatialite.dll') Can make it work, always getting: dbapi_conn.load_extension('C:\\mydll\\mod_spatialite.dll')sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) OsError 0xc1 (193) (Background on this error at: http://sqlalche.me/e/e3q8) ( 'http://www.google.com/url?qdhttp%3A%2F%2Fsqlalche.me%2Fe%2Fe3q8sadDsntzd1us…';return true;" onmousedown="this.href='http://www.google.com/url?qdhttp%3A%2F%2Fsqlalche.me%2Fe%2Fe3q8sadDsntzd1us…';return true;" style="CURSOR: pointer; TEXT-DECORATION: none; BORDER-TOP: 0px; BORDER-RIGHT: 0px; BORDER-BOTTOM: 0px; COLOR: rgb(102,17,204); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; PADDING-LEFT: 0px; MARGIN: 0px; BORDER-LEFT: 0px; PADDING-RIGHT: 0px" href="http://sqlalche.me/e/e3q8)" rel=nofollow target=_blank) I've been told to use import sqlite3 so I make it a try with this code: conn = sqlite3.connect(":memory:") conn.enable_load_extension(True) conn.load_extension('c:\\mydll\\mod_spatialite') Try too with 'c:/mydll/mod_sptatialite' But I got the same error. conn.load_extension('c:\\mydll\\mod_spatialite') sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) OsError 0xc1 (193) (Background on this error at: http://sqlalche.me/e/e3q8) My directory contain the unzip of: http://www.gaia-gis.it/gaia-sins/windows-bin-x86/mod_spatialite-4.3.0a-win-… The directory is set in %PATH% Any hint will be appreciated. Thanks Michael

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Pythonic custom multi-line parsers
by Johannes Bauer July 10, 2019

July 10, 2019

Hi list, I'm looking for ideas as to a pretty, Pythonic solution for a specific problem that I am solving over and over but where I'm never happy about the solution in the end. It always works, but never is pretty. So see this as an open-ended brainstorming question. Here's the task: There's a custom file format. Each line can be parsed individually and, given the current context, the meaning of each individual line is always clearly distinguishable. I'll give an easy example to demonstrate: moo = koo bar = foo foo := abc def baz = abc Let's say the root context knows only two regexes and give them names: keyvalue: \w+ = \w+ start-multiblock: \w+ := The keyvalue is contained in itself, when the line is successfully parsed all the information is present. The start-multiblock however gives us only part of the puzzle, namely the name of the following block. In the multiblock context, there's different regexes that can happen (actually only one): multiblock-item: \s\w+ Now obviously whe the block is finished, there's no delimiter. It's implicit by the multiblock-item regex not matching and therefore we backtrack to the previous parser (root parser) and can successfully parse the last line baz = abc. Especially consider that even though this is a simple example, generally you'll have multiple contexts, many more regexes and especially nesting inside these contexts. Without having to use a parser generator (for those the examples I deal with are usually too much overhead) what I usually end up doing is building a state machine by hand. I.e., I memorize the context, match those and upon no match manually delegate the input data to backtracked matchers. This results in AWFULLY ugly code. I'm wondering what your ideas are to solve this neatly in a Pythonic fashion without having to rely on third-party dependencies. Cheers, Joe

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issue
by joshua kay July 10, 2019

July 10, 2019

Hello, i am encountering a issue with python 3.7.2rc1 64 bit currently My operating system is windows 10 and every time i try to run my code the shell just says: == RESTART: C:\Users\joshu\OneDrive\Desktop\python\projects\multi choice.py == I how scanned the internet looking for a solution until i was made aware by the python installer about the support team, please tell me a solution for my issue thank you, Joshua kay

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Cannot delete or modify
by Hla Kyi July 10, 2019

July 10, 2019

Dear Sir / Madam, I have subscribed mailing Python-list. I have installed and used " Python 3.7.2". I try to modify or uninstall it. Please see the attached screen shot. Please help me how to uninstall and modify. Best Regards. Kyi - Modify.jpg49kB python-list-request(a)python.org

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Re: unable to import pip installed packages and modules in python 3.7.3
by pro_ bro July 9, 2019

July 9, 2019

On Mon, 8 Jul 2019 22:37 pro_ bro, <weaponx4120(a)gmail.com> wrote: > environmental variables are all good ,(i also set path for > site-packages,scripts ) > when i install any package using pip it says installation is successful, > but when i try to import the package(module) it says "NO MODULE NAMED > (MODULE NAME)" > THIS IS HAPPENING TO ALL PIP INSTALLED MODULES > PLEASE CHECK THE IMAGES AND > """"""HELP ME OVERCOME THIS PROBLEM"""""" >

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[RELEASE] Python 3.7.4 is now available
by Ned Deily July 8, 2019

July 8, 2019

Python 3.7.4 is now available. 3.7.4 is the next maintenance release of Python 3.7, the latest feature release of Python. You can find the release files, a link to the changelog, and more information here: https://www.python.org/downloads/release/python-374/ See the "What’s New In Python 3.7" document for more information about the many new features and optimizations included in the 3.7 series. Detailed information about the changes made in 3.7.4 can be found in its change log: https://docs.python.org/3.7/whatsnew/changelog.html#python-3-7-4-final https://docs.python.org/3.7/whatsnew/3.7.html Thanks to all of the many volunteers who help make Python Development and these releases possible! Please consider supporting our efforts by volunteering yourself or through organization contributions to the Python Software Foundation: https://www.python.org/psf/ -- Ned Deily nad(a)python.org -- []

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[RELEASE] Python 3.8.0b2 is now available for testing
by Łukasz Langa July 8, 2019

July 8, 2019

After a few days of delay, but somewhat cutely timed with the US Independence Day, I present you Python 3.8.0b2: https://www.python.org/downloads/release/python-380b2/ <https://www.python.org/downloads/release/python-380b2/> This release is the second of four planned beta release previews. Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to prepare their projects to support the new feature release. The next pre-release of Python 3.8 will be 3.8.0b3, currently scheduled for 2019-07-29. Call to action We strongly encourage maintainers of third-party Python projects to test with 3.8 during the beta phase and report issues found to the Python bug tracker <https://bugs.python.org/> as soon as possible. While the release is planned to be feature complete entering the beta phase, it is possible that features may be modified or, in rare cases, deleted up until the start of the release candidate phase (2019-09-30). Our goal is have no ABI changes after beta 3 and no code changes after 3.8.0rc1, the release candidate. To achieve that, it will be extremely important to get as much exposure for 3.8 as possible during the beta phase. Please keep in mind that this is a preview release and its use is not recommended for production environments. No more non-bugfixes allowed on the “3.8” branch The time has come, team. Please help make Python 3.8 as stable as possible and keep all features not currently landed for Python 3.9. Don’t fret, it’ll come faster than you think. - Ł

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Tkinter Button Command Taking Only Newest Reference In Callback Parameter
by Abdur-Rahmaan Janhangeer July 8, 2019

July 8, 2019

Greetings, I'm doing this project: https://github.com/Abdur-rahmaanJ/cmdlaunch/blob/master/cmdlaunch/cmdlaunch… Everything works fine, except for one thing. On line 60, the button is taking an object in it's command parameter If you run the file, you'll see that all the different names are written on the gui just the callback is takest the newest icon object for all three buttons I know just a reference issue but it's been **bugging** me. Thanks All -- Abdur-Rahmaan Janhangeer Mauritius

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Do I need a parser?
by josé mariano July 8, 2019

July 8, 2019

Dear all, I'm sure that this subject has been addressed many times before on this forum, but my poor knowledge of English and of computer jargon and concepts results on not being able to find the answer i'm looking for when I search the forum. So here is my problem: I have this open source project for the scientific community were i want to duplicate an old MS-DOS application written in Fortran. I don't have the source code. The idea is to re-write the software in Python. Originally, the old application would would need to input files: one config file, written with a specific format (see below) and a second one, the so-called scrip file, that defines the sequence of operations to be performed by the main software, also written in a specific format. To make the transition to the new application as painless as possible to the users, because most of them have their collection of scrips (and settings) developed over the years and are not willing to learn a new script language, I would like to make the new app 100% compatible with the old input files. The operation of the new software would be like this: From the shell, run "my_new_software old_script_file.***". The new software would load the old_script, parse it (?), set the internal variables, load the script and run it. So, to get to my questions: - To load and read the config file I need a parser, right? Is their a parser library where we can define the syntax of the language to use? Are there better (meaning easier) ways to accomplish the same result? - For the interpretation of the script file, I don't have any clue how to this... One important thing, the script language admits some simple control flow statements like do-wile, again written using a specific sintax. Thanks a lot for the help and sorry for the long post. Mariano Example of a config (settings) file ======================== ..... CONDAD -11 BURAD2 4 SALT1 1.0 KNO3 ELEC5 -2.0 mV 400 58 0. 0 ..... Example of a script =================== !Conductivity titration cmnd bur1 f set vinit 100 set endpt 2000 set mvinc 20 set drftim 1 set rdcrit cond 0.5 per_min set dosinc bur1 0.02 1000 set titdir up titratc cond bur1

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Images on Dynamically Generated Buttons Glitch
by Abdur-Rahmaan Janhangeer July 8, 2019

July 8, 2019

Greetings, i have this snippet: --- import json import os from tkinter import * from tkinter.ttk import * root = Tk() jload = json.load buttons = list() programs = os.listdir('programs') for i, program in enumerate(programs): jsonpath = 'programs/{}/cmdlaunch.json'.format(program) info = jload(open(jsonpath)) photo = PhotoImage(file = 'icons/'+info['icon']) photoimage = photo.subsample(3, 3) buttons.append(Button(root, text = 'Click Me !', image = photoimage, compound = LEFT)) buttons[-1].pack() root.mainloop() --- All buttons are appearing but only the last button is displaying the image, any idea? -- Abdur-Rahmaan Janhangeer http://www.pythonmembers.club Mauritius

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