A bytearray can be modified after it is created, so it is a convenient place to collect data piece by piece. When the data is complete, it usually has to...
Python
When an attribute lookup fails, Python tries to help by naming a likely candidate. The suggestion appears at the end of the error message as a "Did you mean" clause...
When strptime parses a string, any components not specified in the format are filled in using default values. A format without a year produces a date in 1900, which is...
An import statement runs as soon as it is reached. The module is located, executed and placed in sys.modules, and the cost is paid whether or not the program ever...
When a text file is opened without specifying an encoding, Python has to choose one. Until now that choice came from the system locale, which means the same code could...
A dictionary can be modified at any time after it is created. Because of that, Python cannot compute a stable hash for it, and an object without a stable hash...
The math module provides mathematical functions that operate on floating-point values. However, several of its functions accept only integers and return results that are exact rather than approximate. Keeping both...
The built-in min and max functions select a value using the usual comparison operators. Every comparison involving NaN evaluates to false, so when one of the arguments is NaN, neither...
Not every float is an ordinary number. Alongside regular values, the format also holds zero in both positive and negative forms, infinities, NaN, and very small numbers stored with reduced...
The re module provides match for testing whether a pattern appears at the beginning of a string. The name is a long-standing source of confusion, because in most other languages...