Recent questions tagged Python

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python - How can I change a specific row label in a Pandas dataframe?

I have a dataframe such as: 0 1 2 3 4 5 0 41.0 22.0 9.0 4.0 2.0 1.0 1 6.0 1.0 2.0 1.0 1. ... .. But how can I do this with a specific row label? 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 does base value do in int function?

I've read the official doc https://docs.python.org/2/library/functions.html#int, but still confused. I've tried ... base is designed to solve? See Question&Answers more detail:os...

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

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737 views

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python - Permission System for Discord.py Bot

I am in the process of making a discord bot using discord.py and asyncio. The bot has commands like kick ... help and suggestions 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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573 views

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python - How to use scipy.optimize.minimize function when you want to compute gradient along with the objective function?

scipy.optimize.minimze takes obj and jac functions as input. and I believe it will call them separately as and when ... if at all there 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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python - Pandas mapping to TRUE/FALSE as String, not Boolean

When I try to convert some columns in a pandas dataframe from '0' and '1' to 'TRUE' and 'FALSE', pandas ... operation. How can I prevent 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 - Count frequency of item in a list of tuples

I have a list of tuples as shown below. I have to count how many items have a number greater than 1. ... item)>1): blocklstgtone.append(item) 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 a generator the callable? Which is the generator?

A generator is simply a function which returns an object on which you can call next, such that for every call ... of the function is reached)? 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 split dataframe to multiple by unique values rows

I have a DataFrame in Pandas PRICE Name PER CATEGORY STORENAME 0 9.99 MF gram Indica Store1 1 9.99 HY gram ... in categories in stores. 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 - Underline Text in Tkinter Label widget?

I am working on a project that requires me to underline some text in a Tkinter Label widget. I know that the ... Python 2.6 on Windows 7. 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 - Best way to implement a non-blocking wait?

In python, if I want to keep a process or thread running forever, I can typically do this with an empty while ... or cleaner way of 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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411 views

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python - Why doesn't this set comprehension work?

In Python 2.6.5, given this list mylist = [20, 30, 25, 20] Why does this set comprehension not work ... ^ SyntaxError: invalid syntax 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 - pyaudio could not import _portaudio

Trying to run python app that uses pyaudio. Using virtualenv and installations are working. However when running ... site-packages/_portaudio.so See Question&Answers more detail:os...

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

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377 views

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python - Pandas DataFrame, How do I remove all columns and rows that sum to 0

I have a dataFrame with rows and columns that sum to 0. A B C D 0 1 1 0 1 1 0 0 0 0 2 1 ... and columns that only had zeros have been removed. See Question&Answers more detail:os...

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

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279 views

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python - passing a py.test fixture between test files in a module

I have a common py.test fixture that I want to use generically in different test files within the same module. ... which is the **mgmt_data. See Question&Answers more detail:os...

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

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542 views

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python - Matplotlib: figlegend only printing first letter

I try to print a figlegend with only one line, but I only get the first letter. I have the following script for making ... ? (Or is it a bug?) See Question&Answers more detail:os...

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

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679 views

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python - Check if a function has a decorator

My question is a general one, but specifically my application is the login_required decorator for Django. I'm curious ... no results so far. See Question&Answers more detail:os...

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

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527 views

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python - How to set parameters in keras to be non-trainable?

I am new to Keras and I am building a model. I want to freeze the weights of the last few layers of the ... it is set to be non-trainable. See Question&Answers more detail:os...

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

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395 views

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python - How to replace the white space in a string in a pandas dataframe?

Suppose I have a pandas dataframe like this: Person_1 Person_2 Person_3 0 John Smith Jane Smith Mark Smith 1 ... Thank you 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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725 views

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python - How to filter query in sqlalchemy by year (datetime column)

I have table in sqlalchemy 0.4 that with types.DateTime column: Column("dfield", types.DateTime, index=True) I want ... ??? is for me unclear. See Question&Answers more detail:os...

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

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650 views

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python - Get all pairwise combinations from a list

For example, if the input list is [1, 2, 3, 4] I want the output to be [(1, 2), (1, 3), (1, ... using two for loops. How do I implement 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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1.3k views

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python - mysql LOAD DATA INFILE with auto-increment primary key

I am trying to load a data file into mysql table using "LOAD DATA LOCAL INFILE 'filename' INTO TABLE ' ... with an auto increment index. 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 - How to read the last MB of a very large text file

I am trying to find a string near the end of a text file. The problem is that the text file can vary greatly ... in line: ? error? = True 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 - A Nose plugin to specify the order of unit test execution

I have a desire to use Nose for an over the wire integration test suite. However, the order of execution of ... figured I would leave it up. See Question&Answers more detail:os...

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

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544 views

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python - Passing additional arguments using scipy.optimize.curve_fit?

I am writing a program in Python that will fit Gaussian and Lorentzian shapes to some given resonance data. I ... can be done with leastsq? See Question&Answers more detail:os...

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

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816 views

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python - TypeError: 'int' object does not support item assignment

Why do I get this error? a[k] = q % b TypeError: 'int' object does not support item assignment Code: ... ) print (algorithmone(111,1201,121)) See Question&Answers more detail:os...

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

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323 views

1 answer

python - Why are attributes lost after copying a Pandas DataFrame

Why is it not possible to pass attributes of an instance through a copy? I want to pass the name attribute ... object has no attribute 'name' 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 - Why does Django use tuples for settings and not lists?

Quoting this answer: Apart from tuples being immutable there is also a semantic distinction that should guide their ... semantically for a list? See Question&Answers more detail:os...

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

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331 views

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python - Spark Data Frame Random Splitting

I have a spark data frame which I want to divide into train, validation and test in the ratio 0.60, 0.20,0.20 ... and why the sum is not equal? See Question&Answers more detail:os...

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

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