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

IP address to binary conversion
by Jeroen Wolff May 9, 2020

May 9, 2020

Hi, Can somebody help me (a newbee) to convert an ip address to is 32 bits representation? i would like to store these 32bits interger into a MYSQL database together with the mask. Jeroen

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Re: compiling 3.7.0 from source with custom libffi path
by tomerv＠gmail.com May 6, 2020

May 6, 2020

On Monday, September 24, 2018 at 11:48:59 AM UTC+3, Fetchinson . wrote: > I'm trying to compile python 3.7.0 from source with a custom libffi > path and the compiler/linker doesn't seem to pick up the right > version. The system libffi doesn't have the development files so I've > installed the latest libffi (also from source) to /opt/custom but > still I get > > INFO: Could not locate ffi libs and/or headers > > Failed to build these modules: > _ctypes > > Although I compile python with --prefix=/opt/custom because that's the > location I'd like to install it too. So how do I tell the build system > where to find my custom libffi? > > Cheers, > Daniel > > > > -- > Psss, psss, put it down! - http://www.cafepress.com/putitdown After some messing around with the build scripts, I figured it out. This works for me: 0. Choose installation path for FFI -> $LIBFFI_PATH 1. Configure, build, install libffi: 1a. Download libffi from https://sourceware.org/libffi/ and untar it 1b. ./configure --prefix $LIBFFI_PATH 1c. make 1d. make install 2. Configure CPython: (I'm using tcsh syntax, it is slightly different with bash) 2a. setenv PKG_CONFIG_PATH $LIBFFI_PATH/lib/pkgconfig/ 2b. setenv LDFLAGS "-L $LIBFFI_PATH/lib64/" 2c. /configure --with-pydebug 3. Build 3a. setenv LD_LIBRARY_PATH "${LIBFFI_PATH}/lib64/" 3b. make -s -j2 Good luck!

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Re: Escaping confusion with Python 3 + MySQL
by Νίκος Βέργος April 22, 2020

April 22, 2020

Τη Κυριακή, 26 Μαρτίου 2017 - 5:19:27 μ.μ. UTC+3, ο χρήστης Ian έγραψε: > You need to change the placeholders back. The poster who told you to > replace them was misinformed. okey altered them back to cur.execute('''UPDATE visitors SET (pagesID, host, ref, location, useros, browser, visits) VALUES (%s, %s, %s, %s, %s, %s, %s) WHERE host LIKE "%%s%" ''', (pID, domain, ref, location, useros, browser, lastvisit, domain) ) but now the problem is how to exact;y type the Where HOST like "%%%" I MEAN HOW TO DIFFERENTIATE '%S' FROM LITERAL '%' character.

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py2c - an open source Python to C/C++ is looking for developers
by maniandram01＠gmail.com April 11, 2020

April 11, 2020

I created py2c ( http://code.google.com/p/py2c )- an open source Python to C/C++ translator! py2c is looking for developers! To join create a posting in the py2c-discuss Google Group or email me! Thanks PS:I hope this is the appropiate group for this message.

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Difference between os.path.isdir and Path.is_dir
by Kirill Balunov Dec. 14, 2019

Dec. 14, 2019

Hi all! It is expected that: ``` >>> import os >>> from pathlib import Path >>> dummy = " " # or "" or " " >>> os.path.isdir(dummy) False >>> Path(dummy).is_dir() True ``` or was it overlooked? with kind regards, -gdg

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Re: help with tkinter
by Wildman Dec. 14, 2019

Dec. 14, 2019

On Thu, 01 Aug 2019 16:31:02 +0300, adam kabbara wrote: > Hello I am having trouble with tkinter when I enter the command from tkinter import* I get an error message > What was the error and what version of Python are you using? For Python 2 you need... from Tkinter import* -- <Wildman> GNU/Linux user #557453 "There are only 10 types of people in the world... those who understand Binary and those who don't." -Spike

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name 'aLOCK' is not defined When I add aLOCK = threading.RLock() behind if __name__ == "__main__"
by xuanwu348 Oct. 27, 2019

Oct. 27, 2019

Hi team Good day The problem I meet when I add "aLOCK = threading.RLock()" to PositionB, the program will report error "name 'aLOCK' is not defined ", but when I change this code to PositionA, it can run normally, is there any difference for the code between 'if __name__ == "__main__:"', can you help me, thanks! The file I was attached, please change the extend ".pyx" to ".py", thanks, code as below, tried python2.7 and python3.4: import threading import time from multiprocessing import Process #PositionA aLOCK = threading.RLock() def Save_runnedCMD(filename, strings): aLOCK.acquire() with open(filename, "at") as f: f.write(str(strings) + "\n\r") aLOCK.release() def runCMD(filename): time.sleep(1) cmd = "testtest" Save_runnedCMD(filename, cmd) def Thr_run(filename): t = [] for i in range(2): tt = threading.Thread(target = runCMD, args=(filename,)) tt.start() t.append(tt) for tt in t: tt.join() if __name__ == "__main__": filename = "./testaaaaa.log" #PositionB #aLOCK = threading.RLock() while 1: t1 = Process(target=Thr_run, args=(filename, )) t1.start() t1.join() Error info as below: D:\Appppp>python testa.py Exception in thread Thread-1: Traceback (most recent call last): File "C:\Python34\lib\threading.py", line 921, in _bootstrap_inner self.run() File "C:\Python34\lib\threading.py", line 869, in run self._target(*self._args, **self._kwargs) File "D:\Appppp\testa.py", line 15, in runCMD Save_runnedCMD(filename, cmd) File "D:\Appppp\testa.py", line 7, in Save_runnedCMD aLOCK.acquire() NameError: name 'aLOCK' is not defined Exception in thread Thread-2: Traceback (most recent call last): File "C:\Python34\lib\threading.py", line 921, in _bootstrap_inner self.run() File "C:\Python34\lib\threading.py", line 869, in run self._target(*self._args, **self._kwargs) File "D:\Appppp\testa.py", line 15, in runCMD Save_runnedCMD(filename, cmd) File "D:\Appppp\testa.py", line 7, in Save_runnedCMD aLOCK.acquire() NameError: name 'aLOCK' is not defined

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[RELEASED] Python 3.5.8rc1 is released
by Larry Hastings Oct. 12, 2019

Oct. 12, 2019

On behalf of the Python development community, I'm chuffed to announce the availability of Python 3.5.8rc1. Python 3.5 is in "security fixes only" mode. This new version only contains security fixes, not conventional bug fixes, and it is a source-only release. You can find Python 3.5.8rc1 here: https://www.python.org/downloads/release/python-358rc1/ I think Python 3.5 may just barely outlive 2.7, //arry/

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pathlib
by DL Neil Oct. 4, 2019

Oct. 4, 2019

Should pathlib reflect changes it has made to the file-system? Sample code, below, shows pathlib identifying a data-file and then renaming it. Yet, after the rename operation, pathlib doesn't recognise its own change; whereas the file system does/proves the change was actioned. $ touch before.file $ python3 Python 3.7.4 (default, Jul 9 2019, 16:48:28) [GCC 8.3.1 20190223 (Red Hat 8.3.1-2)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import pathlib >>> p = pathlib.Path( "before.file" ) >>> p PosixPath('before.file') >>> p.name 'before.file' >>> p.rename( "after.file" ) >>> p.name 'before.file' >>> exit() $ ls -lah after* -rw-rw-r--. 1 dn dn 0 Sep 30 16:05 after.file $ ls -lah before* ls: cannot access 'before*': No such file or directory I would expect pathlib to keep track of changes it has made. Any ideas/good reasons why/why not? NB "name" is a r/o attribute. -- Regards, =dn

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Recursive method in class
by ast Oct. 1, 2019

Oct. 1, 2019

Hello Is it feasible to define a recursive method in a class ? (I don't need it, it's just a trial) Here are failing codes: class Test: def fib(self, n): if n < 2: return n return fib(self, n-2) + fib(self, n-1) t = Test() t.fib(6) --------------------- Traceback (most recent call last): return fib(self, n-2) + fib(self, n-1) NameError: name 'fib' is not defined --------------------- An other try: class Test: @staticmethod def fib(n): if n < 2: return n return fib(n-2) + fib(n-1) t = Test() t.fib(6) ------------------------ Traceback (most recent call last): return fib(n-2) + fib(n-1) NameError: name 'fib' is not defined -------------------------

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