djblets.util.functional¶

Utilities for working with functional code.

iterable_len(iterable: Iterable[Any]) → int¶

Return the length of an iterable.

This is an efficient way of counting the total number of items in an iterable.

Note that this requires that the iterable is finite in length, and does not result in an infinite loop.

New in version 4.0.

Parameters:

iterable (iterable) – The iterable of which to compute the length.

Returns:

The length of the iterable.

Return type:

int

lazy_re_compile(regex: AnyStr, flags: int = 0) → Pattern¶

Return a lazily-compiled regular expression.

This will be compiled the first time it’s accessed, helping to reduce startup time when loading modules or classes that define regular expressions.

New in version 4.0.

Parameters:

• regex (bytes or str) – The regular expression to compile.

• flags (int, optional) – Any flags to pass when compiling the regular expression.

Returns:

A lazily-resolved regular expression.

Return type:

django.utils.functional.SimpleLazyObject