Nov 25, 2023 · It is x that has the value, so we want to know if x is equal to 4; we don't want to tell Python that it is. In that case, you need double =: >>> x = 4 >>> print x == 4 True In any place that you can use =, you can use ==; but it will have a different meaning. For example: >>> x = 4 >>> print x 4 >>> x == 4 True x = 4 tells Python that x is ...

Jun 16, 2012 · You can use the != operator to check for inequality. Moreover in Python 2 there was <> operator which used to do the same thing, but it has been deprecated in Python 3. Share

Mar 21, 2010 · Note that this is pseudo-code not Python code. In Python you cannot create functions called and or or because these are keywords. Also you should never use "evaluate" or if bool(...). Customizing the behavior of your own classes. This implicit bool call can be used to customize how your classes behave with and, or and not.

@J.F. Sebastian, yes, "operator.itemgetter" ,and hundreds of other short functions one would have to know by heart, each to one specific use -- or use lambda, where one can create a generic expression in place, without having to recall exactly which short function does that one job.

Keep in mind that Python provides an easy path to future enhancement, should you find that a simple data attribute needs to grow functional behavior. In that case, use properties to hide functional implementation behind simple data attribute access syntax." –

Oct 18, 2016 · Use it when you want to call a method or access a name (variable) on the instance the method was called on, from inside that method. You don't use self when. You call an instance method normally. Using Oskarbi's example, if you do instance = MyClass(), you call MyClass.my_method as instance.my_method(some_var) not as instance.my_method(self ...

Oct 28, 2010 · If the script grows big enough, or if I feel putting all that code inside a function will benefit me, then I refactor the code and do it. This also happens when I write bash scripts. Even if you put code inside the main function, you are not required to write it exactly like that. A neat variation could be:

Feb 1, 2017 · Or use this if you have a windows system: $ venv\Scripts\activate The (venv) in the shell prompt lets you know which virtualenv you have activated, but you can turn this feature off if you do not like it. You can run all the usual Python commands, and …

Jul 1, 2019 · When you want to collect an immutable ordered list of elements, use a tuple. (For example, when you want a (name, phone_number) pair that you wish to use as an element in a set, you would need a tuple rather than a list since sets require elements be immutable). When you want to collect a mutable ordered list of elements, use a list. (For ...

Sep 11, 2008 · Use r"""raw triple double quotes""" if you use any backslashes in your docstrings. For Unicode docstrings, use u"""Unicode triple-quoted strings""". Still, I like the clean look of single quote and the one keystroke reason you gave.