I just want Column A and D to get dummies not for Column B. If I used pd.get_dummies(df), all columns turned into dummies. I want the final result containing all of columns , which means column C and column B exit,like ‘A_x’,’A_y’,’B’,’C’,’D_j’,’D_l’. Answer It can be done without concatenation, using get_dummies() with required parameters
Filter Pyspark dataframe column with None value
I’m trying to filter a PySpark dataframe that has None as a row value: and I can filter correctly with an string value: but this fails: But there are definitely values on each category. What’s going on? Answer You can use Column.isNull / Column.isNotNull: If you want to simply drop NULL values you can use na.drop with subset argument: Equality
How do we dynamically change the text in label widget of Tkinter according to the change of subscribed topic message?
I wanted to change the text of my label according to the topic message to which my node subscribes. But the problem is that the text in the label is not changing with the change of topic message. A portion of my code is given below:(I used the code to dynamically change the text in the label from https://bytes.com/topic/python/answers/629499-dynamically-displaying-time-using-tkinter-label) Answer
tflearn / tensorflow does not learn xor
Following code was written to learn the XOR function, but about half of the time the network does not learn and the loss after each epoch stays the same. Sometimes I get correct results like this: But often this: My 2x2x1 network should be able to perform XOR, and there is even some evidence that suggests that this network should
Replacing characters in Scrapy item
I’m trying to scrape from a commerce website using Scrapy. For the price tag, I want to remove the “$”, but my current code does not work. What is the appropriate method to remove characters when using Scrapy? Answer extract() would return you a list, you can use extract_first() to get a single value: Or, you can use the .re()
installing cPickle with python 3.5
This might be silly but I am unable to install cPickle with python 3.5 docker image Dockerfile requirements.txt When I try to build the image Answer cPickle comes with the standard library… in python 2.x. You are on python 3.x, so if you want cPickle, you can do this: However, in 3.x, it’s easier just to use pickle. No need
Better place to put common functions?
I’m working on building a custom package for functions I commonly use, and it has several functions that do not fit in any specific module and are used by several modules. I’ve been putting them in __init__.py, and it works, but I’ve seen many tutorials that recommend a very small __init__.py. Is there any better place I can put them?
Python2: Should I use Pickle or cPickle?
Python 2 has both the pickle and cPickle modules for serialization. cPickle has an obvious advantage over pickle: speed. What, if any, advantage does pickle have over cPickle? Answer The pickle module implements an algorithm for turning an arbitrary Python object into a series of bytes. This process is also called serializing” the object. The byte stream representing the object
how to parse json array in django
I am new in django rest api framework and using get i am fetching the a json array whose api is this https://api.coursera.org/api/courses.v1?q=search&query=machine+learning and i am not able to parse it.Actually i want to store all the names and send them to .html file .I have used this code but didnot worked for me. Answer This actually has nothing to
A single string in single quotes with PyYAML
When I edit a YAML file in Python with PyYAML, all of my string values are saved back to the original file without quotes. I wanted one of those strings to be surrounded with single quotes: Changing the default_style parameter in yaml_dump affects whole file, which is not desired. I thought about adding single quotes to the beginning and end