python .replace() regex [duplicate]
No. Regular expressions in Python are handled by the re module. In general:
python
How does collections.defaultdict work?
Usually, a Python dictionary throws a KeyError if you try to get an item with a key that is not currently in the dictionary. The defaultdict in contrast will simply create any items that you try to access (provided of course they do not exist yet). To create such a “default” item, it calls the … Read more
Does Python have a ternary conditional operator?
Yes, it was added in version 2.5. The expression syntax is: First condition is evaluated, then exactly one of either a or b is evaluated and returned based on the Boolean value of condition. If condition evaluates to True, then a is evaluated and returned but b is ignored, or else when b is evaluated … Read more
Python: Start and stop timer [duplicate]
Here’s an answer to the same question you’re asking: https://stackoverflow.com/a/2866456/4380308 Or you can use the ‘timeit’ module: https://stackoverflow.com/a/2866460/4380308
How to overcome TypeError: unhashable type: ‘list’
As indicated by the other answers, the error is to due to k = list[0:j], where your key is converted to a list. One thing you could try is reworking your code to take advantage of the split function: Note that if you are using Python 3.x, you’ll have to make a minor adjustment to … Read more
How to uninstall Anaconda completely from macOS
To remove the configs: Once the configs are removed you can delete the anaconda install folder, which is usually under your home dir: Also, the anaconda-clean –yes command creates a backup in your home directory of the format ~/.anaconda_backup/<timestamp>. Make sure to delete that one also. EDIT (v5.2.0): Now if you want to clean all, … Read more
How to measure elapsed time in Python?
What I want is to start counting time somewhere in my code and then get the passed time, to measure the time it took to execute few function. I think I’m using the timeit module wrong, but the docs are just confusing for me.
Referring to the null object in Python
In Python, the ‘null’ object is the singleton None. The best way to check things for “Noneness” is to use the identity operator, is:
Error: ‘int’ object is not subscriptable – Python
The problem is in the line, What you want is You also need to convert the int to a string for the output… The complete script looks like,
How can I install packages using pip according to the requirements.txt file from a local directory?
This works for me: –no-index – Ignore package index (only looking at –find-links URLs instead). -f, –find-links <URL> – If a URL or path to an HTML file, then parse for links to archives. If a local path or file:// URL that’s a directory, then look for archives in the directory listing.ShareImprove this answer Follow … Read more