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# Module: `core.prompts`

Classes for handling input/output prompts.

Authors:

- Fernando Perez
- Brian Granger
- Thomas Kluyver

## 3 Classes

class `IPython.core.prompts.``LazyEvaluate`(func, *args, **kwargs)

  Bases: `object`

  This is used for formatting strings with values that need to be updated at that time, such as the current time or working directory.

  `__init__`(func, *args, **kwargs)

class `IPython.core.prompts.``UserNSFormatter`(shell)

  Bases: `string.Formatter`

  A Formatter that falls back on a shell’s user_ns and __builtins__ for name resolution

  `__init__`(shell)

class `IPython.core.prompts.``PromptManager`(shell, **kwargs)

  Bases: `IPython.config.configurable.Configurable`

  This is the primary interface for producing IPython’s prompts.

  `__init__`(shell, **kwargs)
  `render`(name, color=True, just=None, **kwargs)

    Render the selected prompt.

    Parameters:

    name : str

    > Which prompt to render. One of ‘in’, ‘in2’, ‘out’, ‘rewrite’

    color : bool

    > If True (default), include ANSI escape sequences for a coloured prompt.

    just : bool

    > If True, justify the prompt to the width of the last prompt. The default is stored in self.justify.

    **kwargs : :

    > Additional arguments will be passed to the string formatting operation, so they can override the values that would otherwise fill in the template.

    Returns: | A string containing the rendered prompt. :

  `update_prompt`(name, new_template=None)

    This is called when a prompt template is updated. It processes abbreviations used in the prompt template (like #) and calculates how many invisible characters (ANSI colour escapes) the resulting prompt contains.

    It is also called for each prompt on changing the colour scheme. In both cases, traitlets should take care of calling this automatically.

## 3 Functions

`IPython.core.prompts.``multiple_replace`(dict, text)

  Replace in ‘text’ all occurences of any key in the given dictionary by its corresponding value. Returns the new string.

`IPython.core.prompts.``cwd_filt`(depth)

  Return the last depth elements of the current working directory.

  $HOME is always replaced with ‘~’. If depth==0, the full path is returned.

`IPython.core.prompts.``cwd_filt2`(depth)

  Return the last depth elements of the current working directory.

  $HOME is always replaced with ‘~’. If depth==0, the full path is returned.

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