Aug 31, 2008 · In Python 3.5, you can also use this syntax in list, dict, tuple, and set displays (also sometimes called literals). See PEP 488: Additional Unpacking Generalizations .

Python doesn't really have ++ and --, and I personally never felt it was such a loss. I prefer functions with clear names to operators with non-always clear semantics (hence the classic interview question about ++x vs. x++ and the difficulties of overloading it).

Jun 17, 2011 · Decorator Syntax: A google search for "decorator python docs" gives as one of the top results, the "Compound Statements" section of the "Python Language Reference." Scrolling down to the section on function definitions, which we can find by searching for the word, "decorator", we see that... there's a lot to read.

In Python 3, your example range(N)[::step] produces a range object, not a list. To really see what is happening, you need to coerce the range to a list, np.array, etc. – PikalaxALT

Dec 8, 2013 · Intro. The % operator in python for strings is used for something called string substitution. String and Unicode objects have one unique built-in operation: the % operator (modulo).

Jan 20, 2013 · I'm trying to port some Python code to C, but I came across this line and I can't figure out what it means: if message.startswith('<stream:stream'): message = message[:-1] + ' />' I understand that if 'message starts with <stream:stream then something needs to be appended. However I can't seem to figure out where it should be appended.

Apr 3, 2014 · The other case involving print >>obj, "Hello World" is the "print chevron" syntax for the print statement in Python 2 (removed in Python 3, replaced by the file argument of the print() function). Instead of writing to standard output, the output is passed to the obj.write() method. A typical example would be file objects having a write() method.

Dec 31, 2009 · In Python, the | symbol is used as a bitwise OR operator for integers and a union operator for sets and some other data structures. Bitwise OR for Integers. When used between two integers, | performs a bitwise OR operation. This means it compares each bit of the integers and returns a new integer where each bit is set to 1 if at least one of ...

Also note that since Parser/asdl_c.py is a Python script, this is a kind of bootstrapping - to build Python from scratch, Python already has to be available. While Parser/asdl_c.py generated the code to manage our newly defined AST node (into the files Include/Python-ast.h and Python/Python-ast.c ), we still have to write the code that converts ...

Sep 13, 2014 · It's been the syntax since Python 2.0. Python 3 made them redundant, as the default string type is Unicode. Versions 3.0 through 3.2 removed them, but they were re-added in 3.3+ for compatibility with Python 2 to aide the 2 to 3 transition.