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Any object can be tested for truth value, for use in an if or while condition or as operand of the Boolean operations below.
Time complexity of operations on built-in types
There are three basic sequence types: lists, tuples, and range objects. Additional sequence types tailored for processing of binary data and text strings are described in dedicated sections.
Textual data in Python is handled with str objects, or strings. Strings are immutable sequences of Unicode code points. String literals are written in a variety of ways:
Python’s with statement supports the concept of a runtime context defined by a context manager. This is implemented using a pair of methods that allow user-defined classes to define a runtime context that is entered befo
One method needs to be defined for container objects to provide iterable support:
Thread safety for list objects
Lists are mutable sequences, typically used to store collections of homogeneous items (where the precise degree of similarity will vary by application).
the typing documentation on annotating tuples
Tuples are immutable sequences, typically used to store collections of heterogeneous data (such as the 2-tuples produced by the enumerate() built-in). Tuples are also used for cases where an immutable sequence of homogen
Strings implement all of the common sequence operations, along with the additional methods described below.
Bytes objects are immutable sequences of single bytes. Since many major binary protocols are based on the ASCII text encoding, bytes objects offer several methods that are only valid when working with ASCII compatible da
Thread safety for bytearray objects
bytearray objects are a mutable counterpart to bytes objects.
The only special operation on a module is attribute access: m.name, where m is a module and name accesses a name defined in m’s symbol table. Module attributes can be assigned to. (Note that the import statement is not,
Function objects are created by function definitions. The only operation on a function object is to call it: func(argument-list).
This object is commonly used to indicate that something is omitted. It supports no special operations. There is exactly one ellipsis object, named Ellipsis (a built-in name). type(Ellipsis)() produces the Ellipsis single
sys.int_info.str_digits_check_threshold
Before Python starts up you can use an environment variable or an interpreter command line flag to configure the limit: