Recent questions tagged Python

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277 views

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python - How to delete all columns in DataFrame except certain ones?

Let's say I have a DataFrame that looks like this: a b c d e f g 1 2 3 4 5 6 7 4 3 7 ... hypothetically I have 1000 columns of data. 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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231 views

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python - Why does `if None.__eq__("a")` seem to evaluate to True (but not quite)?

If you execute the following statement in Python 3.7, it will (from my testing) print b: if None.__eq__("a"): ... None. What's going on 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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289 views

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python - plot a document tfidf 2D graph

I would like to plot a 2d graph with the x-axis as term and y-axis as TFIDF score (or document id) for ... of clusters ranging 0 to 10 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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245 views

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python - Selecting rows from a Pandas dataframe with a compound (hierarchical) index

I'm suspicious that this is trivial, but I yet to discover the incantation that will let me select rows from a Pandas ... ['a','b','c'] See Question&Answers more detail:os...

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

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233 views

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python - Set up virtualenv using a requirements.txt generated by conda

I'm setting up a python project, using an Anaconda virtual environment. I'm generating a requirements.txt so ... themselves some extra 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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129 views

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python - Add/remove custom stop words with spacy

What is the best way to add/remove stop words with spacy? I am using token.is_stop function and would like ... regarding of stop words. 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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121 views

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python - What is the true difference between a dictionary and a hash table?

I've always used dictionaries. I write in Python. See Question&Answers more detail:os...

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

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220 views

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python - iPython Code Completion / Intellisense on Dot Possible?

As someone trying to learn the ins and outs of Python (with emphasis on scientific computing - ie: pandas, ... parameter of pd.read_csv(). See Question&Answers more detail:os...

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

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139 views

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python - Warning message while running Flask

While I am running Flask code from my command line, a warning is appearing: Serving Flask app "hello_flask" ( ... instead. What does this mean? See Question&Answers more detail:os...

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

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250 views

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python - Reading tab-delimited file with Pandas - works on Windows, but not on Mac

I've been reading a tab-delimited data file in Windows with Pandas/Python without any problems. The data file ... file works fine on Windows. See Question&Answers more detail:os...

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

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169 views

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python 2.7 - Save additional attributes in Pandas Dataframe

I recall from my MatLab days using structured arrays wherein you could store different data as an attribute of the main ... this in IO().h5load. See Question&Answers more detail:os...

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

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282 views

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python - What is a "good" palette for divergent colors in R? (or: can viridis and magma be combined together?)

I am interested in having a "good" divergent color pallette. One could obviously use just red, white, and blue: ... of such a solution) 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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154 views

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python - How do I visualize a net in Pytorch?

import torch import torch.nn as nn import torch.optim as optim import torch.utils.data as data import torchvision ... has no attribute 'grad_fn' 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 - What does sudo -H do?

After trying to install virtualenv with pip $ pip install virtualenv I got a permission denied error IOError: [Errno 13] ... sudo's -H flag do? See Question&Answers more detail:os...