Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience.
...string) Decrypts 'string', using the key-dependent data in the object and with the appropriate feedback mode. The string's length must be an exact multiple of the algorithm's block size or, in CFB mode, of the segment size. Returns a string containing the plaintext. encrypt(string) Encrypts a non-empty string, using the key-dependent data in the object, and with the appropriate feedback mode. The string's length must be an exact multiple of the algorithm's block size or, in CFB mode, of the ...
...string]) (unkeyed hashes) new(key, [string], [digestmod]) (keyed hashes) Create a new hashing object and return it. The first form is for hashes that are unkeyed, such as MD5 or SHA. For keyed hashes such as HMAC, 'key' is a required parameter containing a string giving the key to use. In both cases, the optional 'string' parameter, if supplied, will be immediately hashed into the object's starting state, as if obj.update(string) was called. After creating a hashing object, arb...
...algorithm enables the user to select a hash algorithm in the configure step. hash function selection The value of the macro Py_HASH_ALGORITHM defines which hash algorithm is used internally. It may be set to any of the three values Py_HASH_SIPHASH24, Py_HASH_FNV or Py_HASH_EXTERNAL. If Py_HASH_ALGORITHM is not defined at all, then the best available algorithm is selected. On platforms which don't require aligned memory access (HAVE_ALIGNED_REQUIRED not defined) and an unsigned 64 bit integer t...
...string concatenation functions in the string module that are implemented in C. In particular, string.joinfields(list_of_strings, delimiter) concatenates a list of strings, placing a delimiter of choice between each two strings. Nothing stops us from concatenating a list of characters (which are just strings of length one in Python), using the empty string as delimiter. Lo and behold: import string def f6(list): return string.joinfields(map(chr, list), "") ...
...string]) (unkeyed hashes) new([key] , [string]) (keyed hashes) Create a new hashing object and return it. The first form is for hashes that are unkeyed, such as MD5 or SHA. For keyed hashes such as HMAC, key is a required parameter containing a string giving the key to use. In both cases, the optional string parameter, if supplied, will be immediately hashed into the object's starting state, as if obj.update(string) was called. After creating a hashing object, arbitrary string...
...strings. Numeric portions of the version are padded to 8 digits so they will compare numerically, but without relying on how numbers compare relative to strings. Dots are dropped, but dashes are retained. Trailing zeros between alpha segments or dashes are suppressed, so that e.g. "2.4.0" is considered the same as "2.4". Alphanumeric parts are lower-cased. The algorithm assumes that strings like "-" and any alpha string that alphabetically follows "final" represents a "patch level". So, "2...
...string - an abstract string type which is the base class for str (8-bit strings) and unicode. Primarily used to simplify tests for string-ness to isinstance(x, basestring). bool, True, False - these were introduced as ints in Python 2.2.1, but are now a separate type (a subtype of int). This means that True and False are now printed as the strings 'True' and 'False', respectively. As of 2.3b1, bool() without arguments returns False. (PEP 285) compile(), eval(), exec - fully support Unicode, a...
...algorithm converts any string to printable ASCII, and repr() is used as a handy and safe way to print strings for debugging or for logging. Although all non-ASCII characters are escaped, this does not matter when most of the string's characters are ASCII. But for other languages, such as Japanese where most characters in a string are not ASCII, this is very inconvenient. We can use print(aJapaneseString) to get a readable string, but we don't have a similar workaround for printing strings from...
...string to specify the byte order. Using (2) with UTF-16, results in an 8 bit string with a BOM between every character. To work around this problem, a stream writer - which keeps state between calls to the encoding function - has to be used: # (3) us = u"xxx" import codecs, cStringIO as StringIO writer = codecs.getwriter(encoding) v = StringIO.StringIO() uv = writer(v) for c in us: try: uv.write(c) except UnicodeError: uv.write(u"&#%d;" % ord(c)) s = v.getvalue() ...
Version: None
Released: Sept. 6, 2022
This is a security release of Python 3.9 Note: The release you're looking at is Python 3.9.14, a security bugfix release for the legacy 3.9 series. Python 3.11 is now the latest feature release series of Python 3. Get the latest release of 3.11.x here. Security content in this …
View Release Notes
...Algorithm. Consider the following code, which assigns a 100-character string to the variable s: s = "X" * 100 # "X" is assigned When the X is replaced by the Hebrew letter א, the line becomes: s = "א" * 100 # "א" is assigned This command still assigns a 100-character string to s, but when displayed as general text following the Bidirectional Algorithm (e.g. in a browser), it appears as s = "א" followed by a comment. Other surprising examples include: In the statement ערך = 23, the var...
This is a security release of Python 3.8 Note: The release you're looking at is Python 3.8.14, a security bugfix release for the legacy 3.8 series. Python 3.11 is now the latest feature release series of Python 3. Get the latest release of 3.11.x here. Security content in this …
...algorithms to Python objects Goal: Implementation of interfaces for the application of C++ Standard Template Library algorithms and boost algorithms to Python objects, such as Python lists, tuples, strings and Python objects that support the buffer interface. Python LONG support Python provides an arbitrary-precision LONG integer type which is not currently supported by Boost.Python. Goal: Addition of an interface to Python LONGs which allows them to be direct...
...strings, due to its reliance on the regex module. We have not studied it further, although either a port to re, or an integration of a custom tokenizer may have been feasible. YAPPS Following the links on the String SIG page [Kuc00], we found "Yet Another Python Parser System", YAPPS, by Amit Patel. Even though the parser only supports LL(1) languages due to its recursive-descent strategy, it turned out that the XPath grammar could easily be rewritten to be acceptable using standard ...
...string literal was copied literally from the file on source. In Python 2.0, the source encoding changed to Latin-1 as a side effect of introducing Unicode. For Unicode string literals, the characters were still copied literally from the source file, but widened on a character-by-character basis. As Unicode gives a fixed interpretation to code points, this algorithm effectively fixed a source encoding, at least for files containing non-ASCII characters in Unicode literals. PEP 263 identified the ...
Note: The release you are looking at is a security bugfix release for the legacy 3.7 series which has now reached end-of-life and is no longer supported. See the downloads page for currently supported versions of Python. The final source-only security fix release for 3.7 was 3.7.17. Please see …
...string operation from the Spec. This is possible, because (from Aahz): "The string form already contains all the necessary information to reconstruct a Decimal object". And it also complies with the Spec; Tim Peters: There's no requirement to have a method named "to_sci_string", the only requirement is that some way to spell to-sci-string's functionality be supplied. The meaning of to-sci-string is precisely specified by the standard, and is a good choice for both str(Decimal) and repr(Decimal...
...string[, base_number]]) long([number_or_string]) float([number_or_string]) complex([number_or_string[, imag_number]]) str([object]) unicode([string[, encoding_string]]) tuple([iterable]) list([iterable]) type(object) or type(name_string, bases_tuple, methods_dict) The signature of type() requires an explanation: traditionally, type(x) returns the type of object x, and this usage is still supported. However, type(name, bases, methods) is a new usage that creates...