Jan 30, 2011 · I need to know what += does in Python. It's that simple. I also would appreciate links to definitions of other shorthand tools in Python.

Python slicing is a computationally fast way to methodically access parts of your data. In my opinion, to be even an intermediate Python programmer, it's one aspect of the language that it is necessary to be familiar with.

Mar 21, 2023 · In Python this is simply =. To translate this pseudocode into Python you would need to know the data structures being referenced, and a bit more of the algorithm implementation. Some notes about psuedocode: := is the assignment operator or = in Python = is the equality operator or == in Python There are certain styles, and your mileage may vary:

Jun 16, 2012 · 1 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.

Jun 17, 2011 · 96 What does the “at” (@) symbol do in Python? @ symbol is a syntactic sugar python provides to utilize decorator, to paraphrase the question, It's exactly about what does decorator do in Python? Put it simple decorator allow you to modify a given function's definition without touch its innermost (it's closure).

Mar 21, 2010 · There is no bitwise negation in Python (just the bitwise inverse operator ~ - but that is not equivalent to not). See also 6.6. Unary arithmetic and bitwise/binary operations and 6.7. Binary arithmetic operations. The logical operators (like in many other languages) have the advantage that these are short-circuited.

Jan 17, 2013 · It's a function annotation. In more detail, Python 2.x has docstrings, which allow you to attach a metadata string to various types of object. This is amazingly handy, so Python 3 extends the feature by allowing you to attach metadata to functions describing their parameters and return values. There's no preconceived use case, but the PEP suggests several. One very …

Aug 10, 2010 · I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence[::3]?

How do I call an external command within Python as if I had typed it in a shell or command prompt?

Aug 23, 2024 · In Python 2.2 or later in the 2.x line, there is no difference for integers unless you perform a from __future__ import division, which causes Python 2.x to adopt the 3.x behavior. Regardless of the future import, 5.0 // 2 will return 2.0 since …