Python is an extensively used in a general-purpose, the high-level programming in the language. Its design is such that the philosophy emphasizes the code of readability. Moreover, its syntax permits the programmers to express their concepts in quite a few lines of the code, then it could be possible in the languages such as Java or C++. This language gives constructs projected to enable or clear the programs on both the sides the large scale and the small scale.
The Python supports a number of programming paradigms, and it includes the functional programming, the imperative and the object-oriented or the procedural styles. It has the features of a dynamic kind of system and an automatic memory management. Moreover, it has a comprehensive and a large standard library.
The interpreters of python are available for the installation on a lot of operating systems, allowing the Python code execution on most of the parts of the systems. By using the third-party tools like the Pyinstaller or the Py2exe, the python code can be packed into a stand-alone executable program for a few of the most liked operating systems. This allows the system of the Python-based software for the use on that environment without the need for the installation of an interpreter in the Python. The CPython is a reference implementation of the Python and if free, open-source software. It also has a community -based development of a model. As nearly all of its alternative implementations are implemented. It is controlled by the Python Software Foundation, which is a non-profit fund. To install a Python is usually easy, and nowadays several UNIX and Linux distributions also include the recent Python. Some of the Windows computers, especially for the HP are coming with the python installed in it. Installation of the Python is unremarkable on most of the platforms. If you want to know that a library with particular functionality or a particular application is existing in the Python then, there is a wide range of possible sources to get the information. The Python offers a Cheese Shop, which is also known as the Python Package Index. It is a reference to the name of the script Monty Python.
It is used in the dynamic typing and the combination of a cycle-detecting of the garbage collector and a reference counting for the memory management. It is an essential characteristic of Python. It is a dynamic name resolution that binds the method and unpredictable names throughout the program execution. The design of it offers only a certain amount of support for the functional programming within the Lisp tradition. This language has a filter, reduce and a map functions. It comprehends the dictionaries, sets and lists as well as the generator expressions. The standard library has two modules such as the functools and the itertools which implements the useful tools borrowed from the Standard ML and the Haskell. The Python is a structure that is fully programmed and is fully supported. There are a number of language features that support the functional program.
|Python 3.9.5 May 5, 2021||
Creating a sqlite3.Connection object now also produces a sqlite3.connect auditing event. Previously this event was only produced by sqlite3.connect() calls. Patch by Erlend E. Aasland.
The presence of newline or tab characters in parts of a URL could allow some forms of attacks.
Following the controlling specification for URLs defined by WHATWG urllib.parse() now removes ASCII newlines and tabs from URLs, preventing such attacks.
Ensures interpreter-level audit hooks receive the cpython.PyInterpreterState_New event when called through the _xxsubinterpreters module.
ipaddress module no longer accepts any leading zeros in IPv4 address strings. Leading zeros are ambiguous and interpreted as octal notation by some libraries. For example the legacy function socket.inet_aton() treats leading zeros as octal notatation. glibc implementation of modern inet_pton() does not accept any leading zeros. For a while the ipaddress module used to accept ambiguous leading zeros.
|Python 3.9.4 Apr 7, 2021||
Core and Builtins:
bpo-43710: Reverted the fix for https://bugs.python.org/issue42500 as it changed the PyThreadState struct size and broke the 3.9.x ABI in the 3.9.3 release (visible on 32-bit platforms using binaries compiled using an earlier version of Python 3.9.x headers).
bpo-26053: Fixed bug where the pdb interactive run command echoed the args from the shell command line, even if those have been overridden at the pdb prompt.
|Python 3.9.2 Feb 22, 2021||
This release, just as the candidate before it, contains two security fixes:
bpo-42938: Avoid static buffers when computing the repr of ctypes.c_double and ctypes.c_longdouble values. This issue was assigned CVE-2021-3177.
bpo-42967: Fix web cache poisoning vulnerability by defaulting the query args separator to &, and allowing the user to choose a custom separator. This issue was assigned CVE-2021-23336.
New syntax features:
PEP 584, union operators added to dict;
PEP 585, type hinting generics in standard collections;
PEP 614, relaxed grammar restrictions on decorators.
New built-in features:
PEP 616, string methods to remove prefixes and suffixes.
New features in the standard library
PEP 593, flexible function and variable annotations;
os.pidfd_open() added that allows process management without races and signals.
PEP 573, fast access to module state from methods of C extension types;
PEP 617, CPython now uses a new parser based on PEG;
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