Python 3 In Python 3, this question doesn’t apply. The plain int type is unbound. However, you might actually be looking for information about the current interpreter’s word size, which will be the same as the machine’s word size in most cases. That information is still available in Python 3 as sys.maxsize, which is the … Read more
# To sort the list in place… ut.sort(key=lambda x: x.count, reverse=True) # To return a new list, use the sorted() built-in function… newlist = sorted(ut, key=lambda x: x.count, reverse=True) More on sorting by keys.
From New-style and classic classes: Up to Python 2.1, old-style classes were the only flavour available to the user. The concept of (old-style) class is unrelated to the concept of type: if x is an instance of an old-style class, then x.__class__ designates the class of x, but type(x) is always <type ‘instance’>. This reflects … Read more
You want to use os.path.expanduser. This will ensure it works on all platforms: from os.path import expanduser home = expanduser(“~”) If you’re on Python 3.5+ you can use pathlib.Path.home(): from pathlib import Path home = str(Path.home())
There are many ways to import a python file, all with their pros and cons. Don’t just hastily pick the first import strategy that works for you or else you’ll have to rewrite the codebase later on when you find it doesn’t meet your needs. I’ll start out explaining the easiest example #1, then I’ll … Read more
First declare your list properly, separated by commas. You can get the unique values by converting the list to a set. mylist = [‘nowplaying’, ‘PBS’, ‘PBS’, ‘nowplaying’, ‘job’, ‘debate’, ‘thenandnow’] myset = set(mylist) print(myset) If you use it further as a list, you should convert it back to a list by doing: mynewlist = list(myset) … Read more
Use TestCase.assertRaises (or TestCase.failUnlessRaises) from the unittest module, for example: import mymod class MyTestCase(unittest.TestCase): def test1(self): self.assertRaises(SomeCoolException, mymod.myfunc)
Named tuples are basically easy-to-create, lightweight object types. Named tuple instances can be referenced using object-like variable dereferencing or the standard tuple syntax. They can be used similarly to struct or other common record types, except that they are immutable. They were added in Python 2.6 and Python 3.0, although there is a recipe for … Read more
I just used the following which was quite simple. First open a console then cd to where you’ve downloaded your file like some-package.whl and use pip install some-package.whl Note: if pip.exe is not recognized, you may find it in the “Scripts” directory from where python has been installed. If pip is not installed, this page … Read more
The shebang line in any script determines the script’s ability to be executed like a standalone executable without typing python beforehand in the terminal or when double clicking it in a file manager (when configured properly). It isn’t necessary but generally put there so when someone sees the file opened in an editor, they immediately … Read more