I’m working on a console application. My application uses urwid lib. In some cases, I need to show very long hyperlinks as short text inside table columns. I want to open links in the browser when I click on the text inside the column. So, my question is: It is possible to print text as a hyperlink to t…
Tag: python
Django FileField not cooperating with Python 3’s csv module
I have this form: The intended purpose of import_csv() is to import the CSV to the application’s database, but it has been altered for brevity’s sake. An exception occurs when I attempt to iterate over school_csv, which I guess is when DictReader first attempts to read the file: I don’t beli…
Comparing Python Hashes
I want to compare a hash of my password to a hash of what the user typed in, with (str)(hashlib.md5(pw.encode(‘utf-8′)).hexdigest()). The hash of the password is b’¥_ÆMÐ1;2±*öªÝ=’. However, when I run the above code, I get b’xa5x83_xc6x85Mxd01;2xb1*xf6xaaxdd=’. For this rea…
Dropping Multiple Columns from a dataframe
I know how to drop columns from a data frame using Python. But for my problem the data set is vast, the columns I want to drop are grouped together or are basically singularly spread out across the column heading axis. Is there a shorter way to slice or drop all the columns with fewer lines of code rather tha…
Why can list comprehension select columns of a matrix?
Why can the list comprehension select the columns of a matrix? I am a bit confused by the for-loop. Obviously the below codes give the right answer, but why is that? Because in each iteration, the for-loop takes in a whole row instead of a number? Answer If you think about it, you are looping over the list an…
pymongo auth failed in python script
I have installed mongodb and enabled auth. and its working find. I can connect it from remote notebook using robomongo application: and We can connect from server shell locally using: Everything works fine, but when we try it using pymongo api. authentications failed. below is the python code: Tools used: Err…
Python: how to mock a kafka topic for unit tests?
We have a message scheduler that generates a hash-key from the message attributes before placing it on a Kafka topic queue with the key. This is done for de-duplication purposes. However, I am not sure how I could possibly test this deduplication without actually setting up a local cluster and checking that i…
pandas concat generates nan values
I am curious why a simple concatenation of two dataframes in pandas: of the same shape and both without NaN values can result in a lot of NaN values if joined. How can I fix this problem and prevent NaN values being introduced? Trying to reproduce it like failed e.g. worked just fine as no NaN values were int…
Searching any tree in Python
I need to write a function in Python that takes a tree and an index and returns the subtree or leaf at that index. I tried with loops and nested loops until I realized that the tree that had to run the tests was always the same: which actually looks like this: Sample tree So all I needed to pass
How to define enum values that are functions?
I have a situation where I need to enforce and give the user the option of one of a number of select functions, to be passed in as an argument to another function: I really want to achieve something like the following: So the following can be executed: Answer Your assumption is wrong. Values can be arbitrary,…