Recent questions tagged Python

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When using pip install Twisted in virtualenv on Mac osx 10.9.4, I get this result: Command "python setup.py ... Verify return code: 0 (ok) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - What is the difference between boto3 list_objects and list_objects_v2?

I'm trying to list objects in an Amazon s3 bucket in python using boto3. It seems boto3 has 2 functions for ... of using one over the other? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - SymPy - Arbitrary number of Symbols

I am coding a function that solves an arbitrary number of simultaneous equations. The number of equations is set ... a more efficient approach? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to check if file exists in Google Cloud Storage?

I have a script where I want to check if a file exists in a bucket and if it doesn't then create one. ... way to check whether the file exists. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Mocking __init__() for unittesting

I have a class: class DatabaseThing(): def __init__(self, dbName, user, password): self.connection = ... seemed useful in the documentation. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - cmake error 'the source does not appear to contain CMakeLists.txt'

I'm installing opencv in ubuntu 16.04. After installing the necessary prerequisites I used the following ... Project Git repository here. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Pipfile.lock out of date

I'm trying to deploy a large django project to heroku. I installed Heroku CLI, logged in, created an app ... but that didn't change anything. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Processing multiple values for one single option using getopt/optparse?

Is it possible to fetch multiple values for one option using getopt or optparse, as shown in the example below: ... 've not looked at argparser. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Concatenate two numpy arrays in the 4th dimension

I have two numpy arrays with three dimensions (3 x 4 x 5) and I want to concatenate them so the ... correspond to the original two arrays. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Difference between ManyToOneRel and ForeignKey?

In django, what's the difference between a ManyToOneRel and a ForeignKey field? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - If all in list == something

Using Python 2.6, is there a way to check if all the items of a sequence equals a given value, in one ... = False break if all_int: do() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Unit test script returns exit code = 0 even if tests fail

My testing script looks as follows: import os import sys from unittest import defaultTestLoader as loader, TextTestRunner ... with my script? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Issue warning for missing comma between list items bug

The Story: When a list of strings is defined on multiple lines, it is often easy to forget a comma between ... the problem as early as possible? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Extract element with no class attribute

I need to navigate to an html element of a particular type. However, there are many such elements of that type ... or is there some other way? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Tensor with unspecified dimension in tensorflow

I'm playing around with tensorflow and ran into a problem with the following code: def _init_parameters(self, ... I doing something wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Should internal class methods return values or just modify instance variables?

I am creating a query builder class that will help in constructing a query for mongodb from URL params. I ... ? Any help is appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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532 views

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python - SQLAlchemy INSERT IGNORE

How can I insert multiple data records into table ignoring duplicates. I am using SQLAlchemy. Thank you! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Find number of columns in csv file

My program needs to read csv files which may have 1,2 or 3 columns, and it needs to modify its behaviour ... columns, all must have the same. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Error with igraph library - deprecated library

I have changed my computer to a Linux Mint x64 OS and I have throubles with a python library, igraph library, when ... , library version 0.6.5-1 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How can I format an integer to a two digit hex?

Does anyone know how to get a chr to hex conversion where the output is always two digits? for example, if my ... (ord(byteStr[i]))[2:] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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787 views

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python - String format a JSON string gives KeyError

Why does this code give a KeyError? output_format = """ { "File": "{filename}", "Success": {success}, " ... Error message: KeyError: ' "File"' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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442 views

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python - How can I configure Pylint to check all things PEP8 checks?

Searching for an answer on Pylint's mailing list brings no interesting results. Pylint is known to be ... W293 blank line contains whitespace See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - List with many dictionaries VS dictionary with few lists?

I am doing some exercises with datasets like so: List with many dictionaries users = [ {"id": 0, "name": " ... I work with panda df's right? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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309 views

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python - What is the pythonic way to read CSV file data as rows of namedtuples?

What is the best way to take a data file that contains a header row and read this row into a named tuple ... a file header into a namedtuple? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Simply save file to folder in Django

I have a piece of code which gets a file from a form via POST. file = request.FILES['f'] What would be the ... ): fout.write(chunk) fout.close() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Multiline log records in syslog

So I've configured my Python application to log to syslog with Python's SysLogHandler, and everything works ... logger.exception("EXCEPTION") See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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436 views

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python - Updates to JSON field don't persist to DB

We have a model with a JSON field where user flags get inserted. Inserting does work as expected, but when ... type. Any advice on this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Is it safe to just implement __lt__ for a class that will be sorted?

Suppose instances of my ClassA will end up in a data structure and we know sorted() will be called on it. It' ... le,ge,ne). Is this sufficient? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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