Recent questions tagged Python

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python - pprint(): how to use double quotes to display strings?

If I print a dictionary using pprint, it always wraps strings around single quotes ('): >>> from pprint import pprint >>> ... BBB": 2, "CCC": 3} See Question&Answers more detail:os...

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

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275 views

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python - How to mock/set system date in pytest?

In some of my tests I am having a problem that they fail on Travis because of time and time zone problems, so I ... my test. How can I do 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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270 views

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python - Django - accessing the RequestContext from within a custom filter

I've got a filter currency, which takes a value in USD and converts it to a currency (either USD or GBP). The ... '0.63')) return mark_safe(val) See Question&Answers more detail:os...

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

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238 views

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python - Multiple columns with the same name in Pandas

I am creating a dataframe from a CSV file. I have gone through the docs, multiple SO posts, links as I have ... . How can I get that column? 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 - Copy list and append an element in one line

Can this be reduced to a single line (after assigning a)? a = [1,2,3] b = a[:] b.append(4) See Question&Answers more detail:os...

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

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626 views

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python - Django REST Framework : "This field is required." with required=False and unique_together

I want to save a simple model with Django REST Framework. The only requirement is that UserVote.created_by is set ... code? Thanks in advance! 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 - Don't parse options after the last positional argument

I'm writing a wrapper around the ssh command line client. After the first positional argument that's part ... consumed as positional arguments? 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 - Pandas - Interleave / Zip two DataFrames by row

Suppose I have two dataframes: >> df1 0 1 2 0 a b c 1 d e f >> df2 0 1 2 0 A B C 1 D E F How ... is also the case with my real DFs). Any ideas? 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 - Pandas: `item` has been deprecated

So far I used this line of code here: max_total_gross = event_data["max_total_gross"].loc[event_data["event_id"] ... expected a single integer. See Question&Answers more detail:os...

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

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320 views

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python - pandas - merging with missing values

There appears to be a quirk with the pandas merge function. It considers NaN values to be equal, and will ... without first slicing them out? See Question&Answers more detail:os...

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

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303 views

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python - I get an error in python3 when importing mechanize

I get an error in python3 when importing mechanize. I've just installed mechanize into my virtualenv where python3 is ... ==0.2.6.dev-20140305 See Question&Answers more detail:os...

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

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359 views

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python sphinx - In reStructuredText, how to put an inline literal inside of a hyperlink?

In my reStructuredText document, I have a section defined like so: Update the ``PATH`` Environment Variable ------ ... . Can anyone help me out? See Question&Answers more detail:os...

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

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500 views

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python - Django filter query on with property fields automatically calculated

There is Django Order model with property fields automatically calucated. How to do a filter query. class Order(models ... 'expire' into 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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227 views

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python - Is there a way to construct an object using PyYAML construct_mapping after all nodes complete loading?

I am trying to make a yaml sequence in python that creates a custom python object. The object needs to be ... node's objects have been loaded? See Question&Answers more detail:os...

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

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391 views

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python - Replace nan values in tensorflow tensor

I'm working on a convolutional neural network in tensorflow and I have a problem. The problem is the input image I ... I feed it to the net? See Question&Answers more detail:os...

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

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375 views

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python - How to create a permutation in c++ using STL for number of places lower than the total length

I have a c++ vector with std::pair<unsigned long, unsigned long> objects. I am trying to generate permutations of the objects ... , 4) (7, 6, 5) See Question&Answers more detail:os...

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

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339 views

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python - How do I delete the Nth list item from a list of lists (column delete)?

How do I delete a "column" from a list of lists? Given: L = [ ["a","b","C","d"], [ 1, 2, 3, 4 ... that will do that? Something like: del L[:][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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325 views

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python logging root logger does not show info even if I set the level to INFO

I created the following script. Could any of you explain to me why the output is like what shows below Source ... no output but logging.info has See Question&Answers more detail:os...

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

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264 views

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python - How to define enum values that are functions?

I have a situation where I need to enforce and give the user the option of one of a number of ... or equivalent return theFunction.value() See Question&Answers more detail:os...

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

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229 views

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python - How To Run Arbitrary Code After Django is "Fully Loaded"

I need to perform some fairly simple tasks after my Django environment has been "fully loaded". More specifically ... fully loaded into memory? See Question&Answers more detail:os...

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

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429 views

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python - OpenCV Contours - need more than 2 values to unpack

I am trying to implement contours using the following code.. im = cv2.imread('C:UsersPrashantDesktopT.jpg') imgray = ... i do to correct it. See Question&Answers more detail:os...

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

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302 views

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python - Airflow depends_on_past explanation

According to the official Airflow docs, The task instances directly upstream from the task need to be in a success ... run in the current run? See Question&Answers more detail:os...

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

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299 views

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python - How to collapse consecutive delimiters?

The default split method in Python treats consecutive spaces as a single delimiter. But if you specify a delimiter ... a more convenient 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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519 views

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python - Why am I getting "LinAlgError: Singular matrix" from grangercausalitytests?

I am trying to run grangercausalitytests on two time series: import numpy as np import pandas as pd from statsmodels. ... why this is the case. See Question&Answers more detail:os...

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

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761 views

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python - Django makemessages errors Unknown encoding "utf8"

I installed python separated from yum. Now, I need to recompile the language pack for the OSQA system, but get ... help me to solve this issue? See Question&Answers more detail:os...

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

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476 views

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python - Calendar: day/month names in specific locale

I am playing with Python's calendar module that's in the standard library. Basically I need a list of all days ... . Anyone got a smart idea? See Question&Answers more detail:os...

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

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464 views

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python - Can Django ORM do an ORDER BY on a specific value of a column?

I have a table 'tickets' with the following columns id - primary key - auto increment title - varchar(256) ... the QuerySet.order_by() method? See Question&Answers more detail:os...

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

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241 views

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python - Executing functions within switch dictionary

I have encountered a problem when putting all the modules I've developed into the main program. The switch ... execute the correct function? See Question&Answers more detail:os...

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

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