I’m working on a python program and the author has written a function that looks like this This seems to work, even though str is a built in function and shouldn’t be used as a variable. What is actually happening here? My guess is str will no longer be usable as a function, but only in the scope of the
Tag: python-2.7
Convert a binary image to 2D array or Matrix in Python?
I’m new to image processing and I’m really having a hard time understanding stuff…so the idea is that how do you create a matrix from a binary image in python? to something like this: It not the same image though the point is there. Thank you for helping, I appreciate it cheers Answer Using cv2 -Read more here Using skimage
Using return value inside another function
I have these two functions: and When I run my script, it says that user_channel_number is not defined globally. How can I use user_channel_number inside the delete_events function? Answer Functions can not share their local variables. You can return the value from the first and pass it to the second: Or save value on the object:
Attempted relative import beyond toplevel package
Here is my folder structure: In test_bash__init__.py I have: while in test_bsa_files.py: Now when I issue: I get: Since ‘Mopy” is in the sys.path and bosh__init__.py is correctly resolved why it complains about relative import above the top level package ? Which is the top level package ? Incidentally this is my attempt to add tests to a legacy project
convert an unfair coin into a fair coin in Python 2.7
Using Python 2.7. Suppose I have an unfair coin and I want to turn it into a fair coin using the following way, Probability of generating head is equal for unfair coin; Flip unfair coin and only accept head; When a head is appearing, treat it as 1 (head for virtual fair coin), when another head is appearing, treat it
How to set coordinates when cropping an image with PIL?
I don’t know how to set the coordinates to crop an image in PILs crop(): I tried with gThumb to get coordinates, but if I take an area which I would like to crop, I can only find position 194 336. Could someone help me please? This is my picture: I wish to crop to this: Answer How to set
Accessing the dataLayer (JS variable) when scraping with python
I’m using beautiful soup to scrape a webpages. I want to access the dataLayer (a javascript variable) that is present on this webpage? How can I retrieve it using python? Answer You can parse it from the source with the help of re and json.loads to find the correct script tag that contains the json: Running it you see we
Changing the value of range during iteration in Python
Above the is the code which prints numbers from 0-7 if I use just print i in the for loop. I want to understand the above code how it is working, and is there any way we can update the value of variable used in range(variable) so it iterates differently. Also why it always iterates up to the initial k
Selenium leaves behind running processes?
When my selenium program crashes due to some error, it seems to leave behind running processes. For example, here is my process list: Here is my code: Sometimes, the browser doesn’t load the webpage elements quickly enough so Selenium crashes when it tries to click on something it didn’t find. Other times it works fine. This is a simple example
subclassing dict; dict.update returns incorrrect value – python bug?
I needed to make a class that extended dict and ran into an interesting problem illustrated by the dumb example in the image below. Why is d.update() ignoring the class’s __getitem__? EDIT: This is in python2.7 which does not appear to contain collections.UserDict Thinking UserDict.UserDict is the equivalent I tried this, and it gets closer, but still behaves interestingly. Answer