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

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by L A Smit Jan. 1, 2020

Jan. 1, 2020

Hi Don't know if this is the correct subject but i want a program like an invoice, You make an invoice and save it and the next one is ready to use. I am completely new to programming and want this program for myself. I want to use python to do it. Have already build the program but don't know how to put it in usable format. I hope you understand what i mean. Ex: Input. Quote Nr: Client: Product: Then there will be costs and in the end a cost per product. In the end a save button to save quote with input from line 1 and 2. Then the template is ready for next input. I understand that there is probably hundreds of these programs but to teach myself i want to wright my own program and then i can update it when needed. Thx L Smit

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Re: Friday Finking: Source code organisation
by Greg Ewing Dec. 31, 2019

Dec. 31, 2019

On 31/12/19 3:47 am, Barry Scott wrote: > "define before use" is basically email top-posting for code isn't it? > > It means that the first things that you read in a module are the least interesting. That's not a big problem for top-level code, since you can easily scroll down to the bottom of the file and work backwards. But it's not so easy for classes if you have more than one class in a file. That might be part of the reason I do things the opposite way in classes. -- Greg

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Segmentation violation with python installation under Tumbleweed
by amitsis＠gmail.com Dec. 30, 2019

Dec. 30, 2019

Hello, My full Python installation doesn't seem to work due to a segmentation violation issue with libc-2.30: Dec 30 23:54:14 craylinux1 Kernel: Python [8467]: Segfault at 100013483 ip 00007f6594c896b6 sp 00007ffe1570d188 error 4 in libc-2.30.so [7f6594c10000 + 14d000] 30.12. 23:54:14 craylinux1 kernel: Code: 0f 1f 40 00 66 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 89 f9 48 81 e1 ff 0f 00 00 48 81 f9 cf 0f 00 00 77 6a <f3> 0f 6f 20 66 0f 74 e0 66 0f d7 d4 85 d2 74 04 0f bc c2 c3 48 83 I think this is just a bug of mismatched binaries and libraries in my Python installation. I want to reinstall the full Python installation including the libraries now, but how can you do it with Zypper to get a clean Python environment again? Any help with the detailed command lines would be greatly appreciated. Regards, Andreas

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name 'sys' is not defined
by safiq713＠gmail.com Dec. 30, 2019

Dec. 30, 2019

Deal all, Could you please help me how can I avoid this problem my Jupyter Notebook code was help pls # init a treemix analysis object with some param arguments tmx = ipa.treemix( data=data, imap=imap, minmap=minmap, seed=123456, root="Petronia_petronia", m=2, ) error NameError Traceback (most recent call last) <ipython-input-8-d80ffd5719d7> in <module> 6 seed=123456, 7 root="Petronia_petronia", ----> 8 m=2, 9 ) ~/opt/miniconda3/envs/py3/lib/python3.6/site-packages/ipyrad/analysis/treemix.py in __init__(self, data, name, workdir, imap, minmap, seed, quiet, raise_root_error, binary, *args, **kwargs) 118 119 # others --> 120 self.binary = os.path.join(sys.prefix, "bin", "treemix") 121 self.binary = (binary if binary else self.binary) 122 self.raise_root_error = raise_root_error NameError: name 'sys' is not defined

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'%Y' in strftime() vs. strptime()
by Johannes Bauer Dec. 29, 2019

Dec. 29, 2019

Hi list, I've just stumbled upon a strange phaenomenon and I'm wondering if it's a bug. Short and sweet: Python 3.7.3 (default, Oct 7 2019, 12:56:13) [GCC 8.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> from datetime import datetime as d >>> x = d(1, 1, 1) >>> x.strftime("%Y-%m-%d") '1-01-01' >>> d.strptime(x.strftime("%Y-%m-%d"), "%Y-%m-%d") Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python3.7/_strptime.py", line 577, in _strptime_datetime tt, fraction, gmtoff_fraction = _strptime(data_string, format) File "/usr/lib/python3.7/_strptime.py", line 359, in _strptime (data_string, format)) ValueError: time data '1-01-01' does not match format '%Y-%m-%d' >>> d.strptime("0001-01-01", "%Y-%m-%d") datetime.datetime(1, 1, 1, 0, 0) I.e. for years that are not 4 digits longs, strftime() produces no leading zeros for the '%Y' replacement, but strptime() requires leading zeros. Is this expected behavior? Shouldn't %Y be consistent across both? All the best, Johannes

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With distutils, "optional" C extension module error is fatal
by Dan Stromberg Dec. 29, 2019

Dec. 29, 2019

Hi folks. I'm putting a little time into getting my treap module (like a dict, but always sorted by key) working with distutils. I want it to be able to compile and install the Cython version from an included .c file, or to fall back on a pure python version if that fails. I'm currently using: setup( name='treap', py_modules=[ 'treap', 'py_treap', 'nest', ], # ext_modules=cythonize("pyx_treap.pyx"), ext_modules=[Extension('pyx_treap', ['pyx_treap.c'], optional=True)], # setup_requires=[ # 'Cython' # ], version=version, description='Python implementation of treaps, ) ...plus a few more options to setup that don't seem relevant. If I run python3.6 setup.py build, I get: running build running build_py creating build creating build/lib.linux-x86_64-3.6 copying treap.py -> build/lib.linux-x86_64-3.6 copying py_treap.py -> build/lib.linux-x86_64-3.6 copying nest.py -> build/lib.linux-x86_64-3.6 running build_ext building 'pyx_treap' extension creating build/temp.linux-x86_64-3.6 x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include/python3.6m -c pyx_treap.c -o build/temp.linux-x86_64-3.6/pyx_treap.o pyx_treap.c:4:10: fatal error: Python.h: No such file or directory #include "Python.h" ^~~~~~~~~~ compilation terminated. error: command 'x86_64-linux-gnu-gcc' failed with exit status 1 So it seems like despite using Extension('pyx_treap', ['pyx_treap.c'], optional=True), the cython version is not optional. Am I missing something? Why doesn't it just continue with the pure python modules? I realize I could install python3.6-dev or similar to eliminate the error, but I don't want to assume the user knows that. Thanks!

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Re: Friday Finking: Source code organisation
by Greg Ewing Dec. 28, 2019

Dec. 28, 2019

On 29/12/19 11:49 am, Chris Angelico wrote: > "Define before use" is a broad principle that I try to follow, even > when the code itself doesn't mandate this. I tend to do this too, although it's probably just a habit carried over from languages such as Pascal and C where you have to go out of your way to get things in a different order. But strangely, I tend to do the opposite for methods of a class. I don't really know why. My instinctive idea of the "right" ordering just seems to flip over somehow between modules and classes. -- Greg

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Grepping words for match in a file
by Mahmood Naderan Dec. 28, 2019

Dec. 28, 2019

Hi I have some lines in a text file like ADD R1, R2 ADD3 R4, R5, R6 ADD.MOV R1, R2, [0x10] If I grep words with this code for line in fp: if my_word in line: Then if my_word is "ADD", I get 3 matches. However, if I grep word with this code for line in fp: for word in line.split(): if my_word == word: Then I get only one match which is ADD R1. R2. Actually I want to get 2 matches. ADD R1, R2 and ADD.MOV R1, R2, [0x10] because these two lines are actually "ADD" instructions. However, "ADD3" is something else. How can I fix the code for that purpose? -- Regards, Mahmood

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Re: Friday Finking: Source code organisation
by Greg Ewing Dec. 28, 2019

Dec. 28, 2019

On 29/12/19 11:35 am, DL Neil wrote: > if our mythical collection of > module-functions has an internal-reference, eg b() requires a(), then > function a() MUST exist, ie be defined, 'before' function b(). Not true in Python -- a() must exist by the time b() is run, but they can be written in the file in either order, -- Greg

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Does the argparse generate a wrong help message?
by jfong＠ms4.hinet.net Dec. 27, 2019

Dec. 27, 2019

The codes in test.py are: --------- import argparse parser = argparse.ArgumentParser() parser.add_argument('--foo', nargs='?', help='foo help') parser.add_argument('--goo', nargs=1, help='goo help') args = parser.parse_args() print(args.foo, args.goo) --------- But I get the following result: --------- D:\Works\Python>py test.py -h usage: test.py [-h] [--foo [FOO]] [--goo GOO] optional arguments: -h, --help show this help message and exit --foo [FOO] foo help --goo GOO goo help D:\Works\Python>py test.py --foo 1 --goo 2 1 ['2'] --------- It seems to me that the help message should be: usage: test.py [-h] [--foo FOO] [--goo [GOO]] Do I had missed something? --Jach

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