🌐 Mailman 3 June 2023 - Python-list - python.org

>>> %matplotlib inline results in SyntaxError: invalid syntax
by Mike S Dec. 25, 2023

Dec. 25, 2023

I have installed Python 3.4.4 on XPSP3 and am trying to work my way through this tutorial. A Complete Tutorial on Ridge and Lasso Regression in Python http://www.analyticsvidhya.com/blog/2016/01/complete-tutorial-ridge-lasso-r… In Step 2 "Why Penalize the Magnitude of Coefficients?" we are shown this code: #Importing libraries. The same will be used throughout the article. import numpy as np import pandas as pd import random import matplotlib.pyplot as plt %matplotlib inline I get an error on the last line. I am running this code in Idle Python 3.4.4 Shell... Python 3.4.4 (v3.4.4:737efcadf5a6, Dec 20 2015, 19:28:18) [MSC v.1600 32 bit (Intel)] on win32 Type "copyright", "credits" or "license()" for more information. >>> import numpy as np >>> import pandas as pd >>> import random >>> import matplotlib.pyplot as plt >>> %matplotlib inline SyntaxError: invalid syntax What am I doing wrong? Suggested reading? TIA, Mike

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scipy.optimize.least_squares for more than one dimension?
by Martin Schöön July 8, 2023

July 8, 2023

Yesterday I wanted to move from optimize.leastsq to least_squares. I have data depending on four variables and want to fit a function in four variables to this data. This works with leastsq but not with least_squares. Am I trying to do something least_squares is not capable of? Disclaimer: I was burning midnight oil... TIA /Martin

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What is this TEST BANK stuff ?
by Dan Kolis July 6, 2023

July 6, 2023

Why do we tolerate this spam ? this seems most likely a way to inject viruses into people's workflow. That wiped out usenet. Ahh without an explaination; ( and it woudl have to be a good one ); what is the purpsoe of this, why is it here ? Can it be eliminated ? Regards, Dan

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from __future__ import annotations bug?
by Joseph Garvin July 1, 2023

July 1, 2023

``` from __future__ import annotations from typing import Generic, TypeVar T = TypeVar("T") class Foo(Generic[T]): ... class Bar(Foo[Buzz]): ... # NameError here class Buzz: ... ``` This will error, despite the __future__ import, because cpython is trying to look up Buzz before it's defined, even though we have supposedly prevented annotations from being processed. I realize that Class[Args] is allowed in that area in general and isn't always type annotation related, but does this mean that even with PEP 649 that forward references will still be needed?

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my excel file is not updated to add new data
by small marcc June 26, 2023

June 26, 2023

pandas.ExcelWriter import pandas This code creates the path to the Excel file where the data will be written. It checks if the file already exists, and if so, reads the existing data into a DataFrame. Otherwise, it creates a new empty DataFrame. Then it concatenates the existing data with the new data and writes the result to the Excel file. Finally, it displays a message that the backup was successful and closes the information window. I do not understand why it does not work, the new data is not displayed in excel when I am in python tkinter, my data in python must be displayed in excel. I use the following code to write data to an excel file using pandas: please help meHowever, when I run this code, the new data is not showing in the excel file. I don't understand why this isn't working. Can you help me solve this problem? data = {'Numero du client': [numero_du_client], 'Prénom': [prenom], 'Nom': [nom], 'Adresse': [adresse], 'Numero de téléphone': [numero_de_tel], 'Longueur de cour': [longueur_de_cour], 'Largeur de cour': [largeur_de_cour], "Unite(p ou m)":[boutonPieds, boutonMetres] #edit "Prix_coutant:[prix_coutant], #new add he asks me to define when I haven't done for others "Prix soumission":[prix_soumission], # new add he asks me to define when I haven't done for others "MargeProfit":[marge_profit]} # new dd he asks me to define when I haven't done for others #my link with live excel valid for any move as long as the script and excel are in the same folder chemin_script = os.path.abspath(__file__) dossier_script = os.path.dirname(chemin_script) nom_fichier_excel = "testpython.xlsx" chemin_fichier_excel = os.path.join(dossier_script, nom_fichier_excel) df = pd.DataFrame(data) if os.path.exists(chemin_fichier_excel): df_existant = pd.read_excel(chemin_fichier_excel) else: df_existant = pd.DataFrame() df_concat = pd.concat([df_existant, df], ignore_index=True) df_concat.to_excel(chemin_fichier_excel, index=False) with pd.ExcelWriter(path, engine='xlsxwriter') as writer: df.to_excel(writer, index=False, sheet_name='Clients') print("sauvegarde reussi") fenetre_info.destroy()

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Re: unable to run the basic Embedded Python example
by Christian Gollwitzer June 26, 2023

June 26, 2023

Hi Dave, I can tell you where the error comes from, but I don't know how to fix it correctly: Am 24.06.23 um 19:29 schrieb Dave Ohlsson: > 9. And now, when I ran embedded_python.exe: > > 20:14:06: Starting > C:\temp\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\debug\embedded_python.exe... > Could not find platform independent libraries <prefix> > Python path configuration: > PYTHONHOME = (not set) > PYTHONPATH = (not set) > program name = Python consists of the DLL that you have lined it with plus a large number of files (standard library) which contain, e.g., the encoding data and builtin functions etc. It needs to find these in order to run. You could set PYTHONHOME as an environment variable to point to that folder. If you don't use the regular Pyton installer, then you need to install these files yourself. Maybe there is also a way to set it from the C code. Christian

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unable to run the basic Embedded Python example
by Dave Ohlsson June 25, 2023

June 25, 2023

I cannot get the simple program https://docs.python.org/3/extending/embedding.html#very-high-level-embedding to work. My environment: * Windows 10 * Microsoft Visual Studio 2019 * Qt Creator 10.0.1 (only as an IDE) * Python not installed This is what I did: 1. I downloaded https://www.python.org/ftp/python/3.11.4/Python-3.11.4.tgz 2. I extracted Python-3.11.4.tgz into C:\temp\Python-3.11.4 3. I opened the "x64 Native Tools Command Prompt for VS 2019" which comes with Microsoft Visual Studio 2019 4. In "x64 Native Tools Command Prompt for VS 2019": ********************************************************************** ** Visual Studio 2019 Developer Command Prompt v16.11.26 ** Copyright (c) 2021 Microsoft Corporation ********************************************************************** [vcvarsall.bat] Environment initialized for: 'x64' C:\Program Files (x86)\Microsoft Visual Studio\2019\Community>cd C:\temp\Python-3.11.4\PCbuild C:\temp\Python-3.11.4\PCbuild>build.bat -d // <= option '-d' means "debug" Downloading nuget... [many lines omitted] Build succeeded. C:\temp\Python-3.11.4\PCbuild\pythoncore.vcxproj(578,5): warning MSB3073: The command ""C:\Program Files\Git\cmd\git.exe" name-rev --name-only HEAD > "C:\temp\Python-3.11.4\PCbuild\obj\311amd64_Debug\pythoncore\gitbranch.txt"" exited with code 128. C:\temp\Python-3.11.4\PCbuild\pythoncore.vcxproj(578,5): warning MSB4181: The "Exec" task returned false but did not log an error. C:\temp\Python-3.11.4\PCbuild\pythoncore.vcxproj(579,5): warning MSB3073: The command ""C:\Program Files\Git\cmd\git.exe" rev-parse --short HEAD > "C:\temp\Python-3.11.4\PCbuild\obj\311amd64_Debug\pythoncore\gitversion.txt"" exited with code 128. C:\temp\Python-3.11.4\PCbuild\pythoncore.vcxproj(579,5): warning MSB4181: The "Exec" task returned false but did not log an error. C:\temp\Python-3.11.4\PCbuild\pythoncore.vcxproj(580,5): warning MSB3073: The command ""C:\Program Files\Git\cmd\git.exe" describe --all --always --dirty > "C:\temp\Python-3.11.4\PCbuild\obj\311amd64_Debug\pythoncore\gittag.txt"" exited with code 128. C:\temp\Python-3.11.4\PCbuild\pythoncore.vcxproj(580,5): warning MSB4181: The "Exec" task returned false but did not log an error. 6 Warning(s) 0 Error(s) Time Elapsed 00:00:34.87 C:\temp\Python-3.11.4\PCbuild> 5. I copied the example https://docs.python.org/3/extending/embedding.html#very-high-level-embedding, unchanged, to 'C:\temp\embedded_python\main.c'. 6. I created Qt Creator project file 'C:\temp\embedded_python\ embedded_python.pro': TEMPLATE = app TARGET = embedded_python SOURCES += main.c PYTHON_DIR = C:/temp/Python-3.11.4 INCLUDEPATH += $${PYTHON_DIR}/Include INCLUDEPATH += $${PYTHON_DIR}/PC LIBS += $${PYTHON_DIR}/PCbuild/amd64/python311_d.lib 7. I built the project: 20:02:38: Running steps for project embedded_python... 20:02:38: Starting: "C:\Qt\6.1.3\msvc2019_64\bin\qmake.exe" C:\temp\embedded_python\embedded_python.pro -spec win32-msvc "CONFIG+=debug" "CONFIG-=qml_debug" "CONFIG-=qtquickcompiler" Info: creating stash file C:\temp\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\.qmake.stash 20:02:38: The process "C:\Qt\6.1.3\msvc2019_64\bin\qmake.exe" exited normally. 20:02:38: Starting: "C:\Qt\Tools\QtCreator\bin\jom\jom.exe" -f C:/temp/build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug/Makefile qmake_all jom 1.1.3 - empower your cores 20:02:38: The process "C:\Qt\Tools\QtCreator\bin\jom\jom.exe" exited normally. 20:02:38: Starting: "C:\Qt\Tools\QtCreator\bin\jom\jom.exe" C:\Qt\Tools\QtCreator\bin\jom\jom.exe -f Makefile.Debug cl -c -nologo -Zc:wchar_t -FS -Zc:strictStrings -Zi -MDd -utf-8 -W3 -w44456 -w44457 -w44458 /Fddebug\embedded_python.vc.pdb -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_GUI_LIB -DQT_CORE_LIB -I..\embedded_python -I. -I..\Python-3.11.4\Include -I..\Python-3.11.4\PC -I..\..\Qt\6.1.3\msvc2019_64\include -I..\..\Qt\6.1.3\msvc2019_64\include\QtGui -I..\..\Qt\6.1.3\msvc2019_64\include\QtCore -Idebug -IC:/VulkanSDK/ 1.0.51.0/Include -I..\..\Qt\6.1.3\msvc2019_64\mkspecs\win32-msvc -Fodebug\ @C:\Users\dave\AppData\Local\Temp\main.obj.21168.0.jom main.c ..\embedded_python\main.c(12): warning C4996: 'Py_SetProgramName': deprecated in 3.11 link /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /SUBSYSTEM:WINDOWS "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='*' processorArchitecture='*'" /MANIFEST:embed /OUT:debug\embedded_python.exe @C:\Users\dave\AppData\Local\Temp\embedded_python.exe.21168.484.jom 20:02:39: The process "C:\Qt\Tools\QtCreator\bin\jom\jom.exe" exited normally. 20:02:39: Elapsed time: 00:01. 8. So far, so good. Next, I tried to run embedded_python.exe. In order for the Python DLL to be available: 8a. I closed Qt Creator. 8b. In the Control Panel, "System", "Advanced system settings", tab "Advanced", "Environment Variables...", I added 'C:\temp\Python-3.11.4\PCbuild\amd64' to variable 'Path' under "User variables for dave". 8c. I restarted Qt Creator. 9. And now, when I ran embedded_python.exe: 20:14:06: Starting C:\temp\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\debug\embedded_python.exe... Could not find platform independent libraries <prefix> Python path configuration: PYTHONHOME = (not set) PYTHONPATH = (not set) program name = 'C:\temp\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\debug\embedded_python.exe' isolated = 0 environment = 1 user site = 1 safe_path = 0 import site = 1 is in build tree = 0 stdlib dir = 'C:\temp\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\Lib' Fatal Python error: failed to get the Python codec of the filesystem encoding sys._base_executable = 'C:\\temp\\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\\debug\\embedded_python.exe' sys.base_prefix = 'C:\\temp\\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug' sys.base_exec_prefix = 'C:\\temp\\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug' sys.platlibdir = 'DLLs' sys.executable = 'C:\\temp\\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\\debug\\embedded_python.exe' sys.prefix = 'C:\\temp\\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug' sys.exec_prefix = 'C:\\temp\\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug' sys.path = [ 'C:\\temp\\Python-3.11.4\\PCbuild\\amd64\\python311_d.zip', 'C:\\temp\\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug', 'C:\\temp\\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\\Lib', 'C:\\temp\\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\\debug', ] Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding Python runtime state: core initialized ModuleNotFoundError: No module named 'encodings' Current thread 0x00004298 (most recent call first): <no Python frame> 20:14:06: C:\temp\build-embedded_python-Desktop_Qt_6_1_3_MSVC2019_64bit-Debug\debug\embedded_python.exe exited with code 1 What am I doing wrong?

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TKinter in Python - advanced notions - ok
by Dan Kolis June 24, 2023

June 24, 2023

Well, its kind of obvious to make a skeleton, copy it in for some basic functionality and modularly ( is that a word ? ) manage each piece. That ( like your example ) is fine stuff. As a side note, I am sure large, large highly generalised programs are pretty hard to make. One thing I do is make each file have a null class like: # Empty object maker ( M T ) ... get it say it ! class MT(): pass # Hook point for this module generally mod = MT() Then, a category of symbols ( mostly 'variables ), grow under mod.(Whatever) # This window gets to exist, and it's exit via op sys clicks mod.ws = sb.make_Tk_Window( "seqdecodeshow" + str( a_Num ), gi.kCONFIGWIN ) This basic notion is that self.(stuff) is not quite multi class enough, yet 'global' is unpopular as a notation, due to name pollution. IN A BIG PROGRAM NOT A LITTLE WEENEY One YOU SCRATCH ON A BLACKBOARD SOMEPLACE !!!!!!!!!!!!!! Generally, The way I proceed is to try to avoid CLASSes in each module, but only a little. If you need it, you sure do. So early on ( like < 100 lines, if you avoided a class, roll back and add it ). Then, mod.(anything) is 'sort of' like self to class, but its politics is the filename that made it alone. If mod. is not used exactly in a class, roll it back to self. If its way more abstractley used, upgrade it to your concept of really global, which generally should be somewhat sparely used. All my TK calls are wrapped in a custom layer, it reduces the line count to 1/3. like so: sb.checkableBoole( cFrmL, 0, 0, gi.us, e_Txt, setting_ClickCb ) sb.textCmdLine( cFrmL, 1, 0, gi.us, 'Apply', applyThoseSelects ) sb.textCmdLine( cFrmL, 1, 1, gi.us, 'Reset', resetSelects ) sb.textCmdLine( cFrmL, 1, 2, gi.us, 'Select all', cbSelectAll ) cFrmL is the TK thing that contains these few text lines, with all the bg colors, whitepace, fonts, managed inside This calls 'grid' of course for placement. But all colors, and callbacks for changes are entirely in called pieces, which have been tested like 150% crazy. sb is import screenBuilder1 as sb # Screen maker for TKinter and TKinter ++ windows If you want to use my 'screenbuilder'... talk to me, I suppose. this is a biology IDE, the screen part is just a little piece of a huge initiative. Obviously, the human being's ideas in there head matter so the TK stuff is important, to say the least Regs, Daniel B. Kolis my ref: 24 Jun 2023, https://groups.google.com/g/comp.lang.python/

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Trouble with defaults and timeout decorator
by Jason Friedman June 24, 2023

June 24, 2023

I'm writing a database connectivity module to be used by other modules and leveraging the jaydebeapi module. >From what I can tell jaydebeapi contains no built-in timeout capability, so then I turned to https://pypi.org/project/timeout-decorator/. My goal is to have a default timeout of, say, 10 seconds, which can be overridden by the caller. import jaydebeapi from timeout_decorator import timeout class Database: database_connection = None database_name, user_name, password, host, port = stuff timeout = None def __init__(self, timeout=10): self.timeout = timeout @timeout(self.timeout) def get_connection(self): if not self.database_connection: self.database_connection = jaydebeapi.connect(some_args) return self.database_connection The trouble occurs on line 12 with: NameError: name 'self' is not defined

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Re: Trouble with defaults and timeout decorator
by Piergiorgio Sartor June 24, 2023

June 24, 2023

On 24/06/2023 18.18, Jason Friedman wrote: > I'm writing a database connectivity module to be used by other modules and > leveraging the jaydebeapi module. >>From what I can tell jaydebeapi contains no built-in timeout capability, so > then I turned to https://pypi.org/project/timeout-decorator/. > My goal is to have a default timeout of, say, 10 seconds, which can be > overridden by the caller. > > > import jaydebeapi > from timeout_decorator import timeout > > class Database: > database_connection = None > database_name, user_name, password, host, port = stuff > timeout = None > > def __init__(self, timeout=10): > self.timeout = timeout > > @timeout(self.timeout) > def get_connection(self): > if not self.database_connection: > self.database_connection = jaydebeapi.connect(some_args) > return self.database_connection > > > The trouble occurs on line 12 with: > NameError: name 'self' is not defined A quick search would return that "self" is not available in the class body, only in the class methods. There are workarounds, but I guess not simple ones, expecially for "timeout". bye, -- piergiorgio

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