Recent questions tagged Python

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python - Convert Pandas dataframe to Dask dataframe

Suppose I have pandas dataframe as: df=pd.DataFrame({'a':[1,2,3],'b':[4,5,6]}) When I convert it ... meta=,divisions=) Thank you for your reply. 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 comprehension list of lists

I have a list of lists, and would like to use list comprehension to apply a function to each element in the list ... do I go about doing 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 - cc1plus: warning: command line option "-Wstrict-prototypes" is valid for Ada/C/ObjC but not for C++

I am building a C++ extension for use in Python. I am seeing this warning being generated during the compilation ... gcc 4.4.3 on Ubuntu 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 - "The provided key element does not match the schema" error when getting an item from DynamoDB

This is the table partition key setting The table content When I tried to get an item from the table, it ... print(item) Any ideas? thanks. 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 - In the Django admin site, how do I change the display format of time fields?

I recently added a new model to my site, and I'm using an admin.py file to specify exactly how I want it to appear ... 2011, 12:12*:37* p.m." 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 unicode_literals used for?

I get a weird problem with __future__.unicode_literals in Python. Without importing unicode_literals I get the correct ... override this error? 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 - Reusing code from different IPython notebooks

I am using IPython and want to run functions from one notebook from another (without cutting and pasting them ... and reasonably easy to 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 - Is there a direct approach to format numbers in jinja2?

I need to format decimal numbers in jinja2. When I need to format dates, I call the strftime() method in ... over numbers. 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 - Extracting the first day of month of a datetime type column in pandas

I have the following dataframe: user_id purchase_date 1 2015-01-23 14:05:21 2 2015-02-05 05:07:30 3 2015-02-18 ... returns: 2015-01-01 14:05:21. 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 - NameError: name 'get_ipython' is not defined

I am working on Caffe framework and using PyCaffe interface. I am using a Python script obtained from converting ... me to resolve this error? See Question&Answers more detail:os...

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

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433 views

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python - TypeError: 'int' object is not subscriptable

I'm trying to create a simple program that tells you your lucky number according to numerology. I keep on getting ... lucky number is", sumln` See Question&Answers more detail:os...

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

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424 views

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python - How to fix ''UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 29815: character maps to <undefined>''?

At the moment, I am trying to get a Python 3 program to do some manipulations with a text file filled with ... .fetchall(): writer.writerow(obs) 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 add an model instance to a django queryset?

It seems like a django queryset behaves somehow like a python list. But it doesn't support list's .append ... instance to an existing queryset? See Question&Answers more detail:os...

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

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610 views

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python - Time difference in seconds from numpy.timedelta64

How to get time difference in seconds from numpy.timedelta64 variable? time1 = '2012-10-05 04:45:18 ... representing time difference in seconds. See Question&Answers more detail:os...

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

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680 views

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python - Pandas DataFrame.to_csv raising IOError: No such file or directory

Hi: I am trying to use the Pandas DataFrame.to_csv method to save a dataframe to a csv file: filename = './dir/ ... I am intending for it to 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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170 views

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python - Why do pythonistas call the current reference "self" and not "this"?

Python is the language I know the most, and strangely I still don't know why I'm typing "self" and ... where does this convention come from? See Question&Answers more detail:os...

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

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158 views

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python - Forcing application/json MIME type in a view (Flask)

I can't figure out how to force the MIME type application/json for a view in Flask. Here is a simple ... RESTful Web API with Python & Flask See Question&Answers more detail:os...

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

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927 views

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python mpl_toolkits installation issue

After command pip install mpl_toolkits I receive next error: Could not find a version that satisfies the requirement ... can I solve 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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421 views

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python - flask restful: passing parameters to GET request

I want to create a resource that supports GET request in following way: /bar?key1=val1&key2=val2 I tried this code ... , endpoint='bar') Thanks! See Question&Answers more detail:os...

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

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175 views

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python - Best practices: how do you list required dependencies in your setup.py?

This is how I do it currently: import os from setuptools import setup, find_packages here = os.path.abspath(os.path. ... , how did Django do 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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249 views

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python - What does In [*] in IPython Notebook mean and how to turn it off?

I use Windows 7, Python 2.7.9 plus latest version of IPython 3.1. I ran %python inside an IPython Notebook ... . Anyone know what has happen? See Question&Answers more detail:os...

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

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326 views

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python - How do you kill Futures once they have started?

I am using the new concurrent.futures module (which also has a Python 2 backport) to do some simple ... behavior when using concurrent.futures? 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 - Convert timedelta to floating-point

I got a timedelta object from the subtraction of two datetimes. I need this value as floating point for further ... (time_d) does not work. See Question&Answers more detail:os...

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

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407 views

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python - directory path types with argparse

My python script needs to read files from a directory passed on the command line. I have defined a readable_dir ... args = parser.parse_args() See Question&Answers more detail:os...

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

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260 views

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python - matplotlib: make plus sign thicker

In Matplotlib, I would like to draw a thick plus sign (or a cross), but the one provided in the marker set is ... before. Can I make it thick? See Question&Answers more detail:os...

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

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362 views

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python - How to use django-debug-toolbar on AJAX calls?

I'm curious if there's a reasonable way to use the (amazing) django-debug-toolbar with AJAX queries. For ... direction would be helpful! Thanks! See Question&Answers more detail:os...

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

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193 views

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python - Single line for loop over iterator with an "if" filter?

Silly question: I have a simple for loop followed by a simple if statement: for airport in airports: if airport. ... . Is there a better 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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496 views

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python - *args, **kwargs in jinja2 macros

How are extra args & kwargs handled for a Jinja2 macro? The documentation isn't exactly clear offhand. For ... point. Any thoughts 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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