Input list: [1, 2, 3, 4, 5] Output: [5, 4, 3, 2, 1] I know how to do it with for loop, but my assignment is to do it with while loop; which I have no idea to do. Here is the code I have so far: Answer I would say to make the while loop act like a for
Tag: python
WTForms-JSON not working with FormFields
Nested forms (FormFields) doesn’t get populated with data when I use WTForms-JSON. I can’t spot my mistake, see example below. I send the following JSON-request but the print after form.from_json(request.json) reveals that the address object is never populated with data (also, the “appropria…
how to check which version of nltk, scikit learn installed?
In shell script I am checking whether this packages are installed or not, if not installed then install it. So withing shell script: but it stops shell script at import line in linux terminal tried to see in this manner: which gives nothing thought it is installed. Is there any other way to verify this packag…
Flask-Uploads Permission Denied
I’m using Flask Uploads for an upload form in my Flask application. However, whenever I try to save a file I get this error: It seems like uploads doesn’t have the necessary permissions to save files? Here’s the configuration I’m using for flask-uploads: Also, here’s how I save t…
How does Python babel round numbers?
I’m building a financial website with the Flask framework and I’m currently writing unit tests for it. I’m using the Babel package to format money amounts and I hit upon rather strange rounding behaviour. I would expect rounding to be up in case of a 5, or to at least be consistent. But look…
Set numpy array elements to zero if they are above a specific threshold
Say, I have a numpy array consists of 10 elements, for example: a = np.array([2, 23, 15, 7, 9, 11, 17, 19, 5, 3]) Now I want to efficiently set all a values higher than 10 to 0, so I’ll get: [2, 0, 0, 7, 9, 0, 0, 0, 5, 3] Because I currently use a for loop, which is
How to get a list of the elements in an with Selenium using Python?
I’m using Selenium WebDriver using Python for UI tests and I want to check the following HTML: From this unordered list I want to loop over the elements and check the text in them. I selected the ul-element by its id, but I can’t find any way to loop over the <li>-children in Selenium. Does …
Execute a command on Remote Machine in Python
I am writing a program in python on Ubuntu, to execute a command ls -l on RaspberryPi, connect with Network. Can anybody guide me on how do I do that? Answer Sure, there are several ways to do it! Let’s say you’ve got a Raspberry Pi on a raspberry.lan host and your username is irfan. subprocess It…
Print timestamp for logging in Python
I want to print the current timestamp, when an event succeeded or not in my python script. By only adding… …. at the beginning of each line, te same date appears in every line (I added time.sleep(5)in between) My next idea was to create a function, calling the current time, but i’m failing a…
How do I find the position of a value in a pandas.DataFrame?
I want to search for ‘row3’ in the index of the DataFrame below, which should be 2 for a zero-based array. Is there a function which return the row number of ‘row3’? Thanks in advance for any help. Answer You could use Index.get_loc (docs): But this is a somewhat unusual access pattern…