Lists are a mutable type – in order to create a copy (rather than just passing the same list around), you need to do so explicitly: However, list is already the name of a Python built-in – it’d be better not to use that name for your variable. Here’s a version that doesn’t use list as a variable name, … Read more
Python does not have a trailing if statement. There are two kinds of if in Python: if statement: if condition: statement if condition: block if expression (introduced in Python 2.5) expression_if_true if condition else expression_if_false And note, that both print a and b = a are statements. Only the a part is an expression. So … Read more
That’s more specifically a ternary operator expression than an if-then, here’s the python syntax Better Example: (thanks Mr. Burns) ‘Yes’ if fruit == ‘Apple’ else ‘No’ Now with assignment and contrast with if syntax vs
The easiest way I found is this: Just open another (non-running, existing) notebook on the same kernel, and the issue is magically gone; you can again save the notebooks that were previously showing the _xsrf error. If you have already closed the Jupyter home page, you can find a link to it on the terminal … Read more
Nothing is overlooked. As per the documentation input raises an EOFError when it hits an end-of-file condition. Essentially, input lets you know we are done here there is nothing more to read. You should await for this exception and when you get it just return from your function or terminate the program.
Answer in one line: or even shorter starting with Python 3.6 using random.choices(): A cryptographically more secure version: see this post In details, with a clean function for further reuse: How does it work ? We import string, a module that contains sequences of common ASCII characters, and random, a module that deals with random … Read more
pip when used with virtualenv will generally install packages in the path <virtualenv_name>/lib/<python_ver>/site-packages. For example, I created a test virtualenv named venv_test with Python 2.7, and the django folder is in venv_test/lib/python2.7/site-packages/django.
Make sure the file exists: use os.listdir() to see the list of files in the current working directory Make sure you’re in the directory you think you’re in with os.getcwd() (if you launch your code from an IDE, you may well be in a different directory) You can then either: Call os.chdir(dir), dir being the … Read more
I am trying to get the following script to work. The input file consists of 3 columns: gene association type, gene name, and disease name. I keep getting an error that says: Series objects are mutable and cannot be hashed Any help would be dearly appreciated!
It is probably looking for a character encoding from wordlistfile. Or, if you’re working on a line-by-line basis: EDIT Per the comment below and this answer. My answer above assumes that the desired output is a str from the wordlist file. If you are comfortable in working in bytes, then you’re better off using open(wordlist, … Read more