Recent questions tagged Python

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python - What exactly is the lexsort_depth of a multi-index Dataframe?

What exactly is the lexsort_depth of a multi-index dataframe? Why does it have to be sorted for indexing? For ... fixes this type of indexing? 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 - Flask-CORS not working for POST, but working for GET

I'm running a Flask-Restful API locally and sending a POST request containing JSON from a different port. ... and requesting through axios. 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 - Disable unique prefix matches for argparse and optparse

When I use Python's argparse or optparse command line argument parser, any unique prefix of an argument ... message for incomplete 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 - Detecting circular imports

I'm working with a project that contains about 30 unique modules. It wasn't designed too well, so it's common ... better way to do it, 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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python - SQLAlchemy set default value of one column to that of another column

I am trying to write a class for substances which has a name filed (for the name, as commonly used in the ... there anything else I could 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 - How to add an id to filename before extension?

I have a filename: name.ext I want to do the following: name + id + '.' + ext for name, ext in ... correct way to write the append_id 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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python - Unexpected result with += on NumPy arrays

I am creating symmetric matrices/arrays in Python with NumPy, using a standard method: x = rand(500,500) x = ... about += and NumPy 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 - Why does .loc have inclusive behavior for slices?

For some reason, the following 2 calls to iloc / loc produce different behavior: >>> import pandas as pd ... iloc bound is considered exclusive? 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 - Suppress print output in unittests

Edit: Please notice I'm using Python 2.6 (as tagged) Say I have the following: class Foo: def bar(self) ... the stdout of my tested 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 - Deriving a class from TestCase throws two errors

I have some basic setup/teardown code that I want to reuse in a whole bunch of unit tests. So I got the ... I have two errors in this one. See Question&Answers more detail:os...

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

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445 views

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python 3.x - Tensorflow Keras Copy Weights From One Model to Another

Using Keras from Tensorflow 1.4.1, how does one copy weights from one model to another? As some background, ... the entire model's weights. 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 - Installing pip using easy_install

I don't have root access and i want to install python from scratch. So I downloaded the python source code and ... Edit: I can't use virutalenv 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 - OSError: [Errno 8] Exec format error selenium

Trying to learn how to use selenium, I managed to overcome first error which involved chrome driver not being in ... to me. 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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522 views

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python - How to add a new entry into a dictionary object while using jinja2?

I am not able to append add a new entry into a dictionary object while using jinja2 template. For example, ... .com/saltstack/salt/issues/27494 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 + igraph "plotting not available"

I installed python-igraph 0.5.4 and igraph 0.5.4 (also tested 0.6) from source on a RHEL machine. All ... will need to install it from source. See Question&Answers more detail:os...

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

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130 views

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python - How to apply decorators to lambdas?

Is there any syntax for using a decorator on a lambda function in Python? Example: def simpledecorator(f): def ... know what the syntax is. See Question&Answers more detail:os...

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

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284 views

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python - pandas data frame transform INT64 columns to boolean

Some column in dataframe df, df.column, is stored as datatype int64. The values are all 1s or 0s. Is ... these values with boolean values? See Question&Answers more detail:os...

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

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434 views

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python - Default dict keys to avoid KeyError

I'm calling some JSON and parsing relevant data as CSV. I cannot figure out how to fill in the intermediate JSON dict ... .writerow(row) i = i+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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725 views

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python - Pandas merge giving error "Buffer has wrong number of dimensions (expected 1, got 2)"

I am trying to do a pandas merge and get the above error from the title when I try to run it. I am ... anything wrong from the merge call 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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148 views

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python - How to get single value from dict with single entry?

I saw How to extract dictionary single key-value pair in variables suggesting: d = {"a":1} (k, v), = d. ... for my usecase of calling a 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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132 views

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python - Copy numpy array into part of another array

If I run the following: import numpy as np a = np.arange(9) a = a.reshape((3,3)) I will get this: ... a function built into numpy if it 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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186 views

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python pandas not reading first column from csv file

I have a simple 2 column csv file called st1.csv: GRID St1 1457 614 1458 657 1459 679 1460 732 1461 754 ... is the first column not being read? See Question&Answers more detail:os...

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

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230 views

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python - Did something about `namedtuple` change in 3.5.1?

On Python 3.5.0: >>> from collections import namedtuple >>> cluster = namedtuple('Cluster', ['a', ... named tuples into dictionaries anymore? See Question&Answers more detail:os...

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

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144 views

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python - How can I convert Unicode to uppercase to print it?

I have this: >>> print 'example' example >>> print 'exámple' exámple >>> print 'exámple'.upper() EXáMPLE What I ... .) I'm using Python 2.6. See Question&Answers more detail:os...

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

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182 views

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python - Matplotlib pyplot.title(string) returns error

When I call pyplot.title('some string') it throws the exception, 'str' object is not callable'. I copied the ... anyone know what's going on? See Question&Answers more detail:os...

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

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307 views

1 answer

python - How to express multiple types for a single parameter or a return value in docstrings that are processed by Sphinx?

Sometimes a function in Python may accept an argument of a flexible type. Or it may return a value of a ... meant to be processed by Sphinx? See Question&Answers more detail:os...

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

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152 views

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python - Using alias() for 'select as' in SQLAlchemy

Let's say I have a table 'shares' with the following columns: company price quantity Microsoft 100 10 Google 99 5 ... to do it. Many 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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495 views

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python - "Too many SQL variables" error in django with sqlite3

I'm getting this error using sqlite3 in django: Exception Value: too many SQL variables And I think the answer ... django/db/backends/sqlite3/base.py: return Database.Cursor.execut...

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

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