montepy.universe module#

class montepy.universe.Universe(number)#

Bases: Numbered_MCNP_Object

Class to represent an MCNP universe, but not handle the input directly.

Parameters:: number (int) – The number for the universe, must be ≥ 0

property allowed_keywords#

The allowed keywords for this class of MCNP_Card.

The allowed keywords that would appear in the parameters block. For instance for cells the keywords IMP and VOL are allowed. The allowed keywords need to be in upper case.

Deprecated since version 0.2.0: This is no longer needed. Instead this is specified in montepy.input_parser.tokens.MCNP_Lexer._KEYWORDS().

Returns:: A set of the allowed keywords. If there are none this should return the empty set.
Return type:: set

property cells#

A generator of the cell objects in this universe.

Returns:: a generator returning every cell in this universe.
Return type:: Generator

claim(cells)#

Take the given cells and move them into this universe, and out of their original universe.

Can be given a single Cell, a list of cells, or a Cells object.

Parameters:: cells (Cell, list, or Cells) – the cell(s) to be claimed
Raises:: TypeError – if bad parameter is given.

clone(starting_number=None, step=None)#

Create a new independent instance of this object with a new number.

This relies mostly on copy.deepcopy.

Note

If starting_number, or step are not specified starting_number(), and step() are used as default values, if this object is tied to a problem. For instance a Material will use problem.materials default information. Otherwise 1 will be used as default values

Added in version 0.5.0.

Parameters:

starting_number (int) – The starting number to request for a new object number.
step (int) – the step size to use to find a new valid number.

Returns:

a cloned copy of this object.

Return type:

type(self)

property comments#

The comments associated with this input if any.

This includes all C comments before this card that aren’t part of another card, and any comments that are inside this card.

Returns:: a list of the comments associated with this comment.
Return type:: list

static compress_jump_values(values)#

Takes a list of strings and jump values and combines repeated jump values.

e.g., 1 1 J J 3 J becomes 1 1 2J 3 J

Deprecated since version 0.2.0: This should be automatically handled by the syntax tree instead.

Parameters:: values (list) – a list of string and Jump values to try to compress
Returns:: a list of MCNP word strings that have jump compression
Return type:: list
Raises:: DeprecationWarning – raised always.

static compress_repeat_values(values, threshold=1e-06)#

Takes a list of floats, and tries to compress it using repeats.

E.g., 1 1 1 1 would compress to 1 3R

Deprecated since version 0.2.0: This should be automatically handled by the syntax tree instead.

Parameters:

values (list) – a list of float values to try to compress
threshold (float) – the minimum threshold to consider two values different

Returns:

a list of MCNP word strings that have repeat compression

Return type:

list

Raises:

DeprecationWarning – always raised.

format_for_mcnp_input(mcnp_version)#

Creates a string representation of this MCNP_Object that can be written to file.

Parameters:: mcnp_version (tuple) – The tuple for the MCNP version that must be exported to.
Returns:: a list of strings for the lines that this input will occupy.
Return type:: list

property leading_comments#

Any comments that come before the beginning of the input proper.

Added in version 0.2.0.

Returns:: the leading comments.
Return type:: list

link_to_problem(problem)#

Links the input to the parent problem for this input.

This is done so that inputs can find links to other objects.

Parameters:: problem (MCNP_Problem) – The problem to link this input to.

property number#

The current number of the object that will be written out to a new input.

Return type:: int

property old_number#: Original universe number from the input file.

property parameters#

A dictionary of the additional parameters for the object.

e.g.: 1 0 -1 u=1 imp:n=0.5 has the parameters {"U": "1", "IMP:N": "0.5"}

Returns:: a dictionary of the key-value pairs of the parameters.
Rytpe:: dict

property trailing_comment#

The trailing comments and padding of an input.

Generally this will be blank as these will be moved to be a leading comment for the next input.

Returns:: the trailing c style comments and intermixed padding (e.g., new lines)
Return type:: list

validate()#

Validates that the object is in a usable state.

Raises:: IllegalState if any condition exists that make the object incomplete.

property words#

The words from the input file for this card.

Warning

Deprecated since version 0.2.0: This has been replaced by the syntax tree data structure.

Raises:: DeprecationWarning – Access the syntax tree instead.

static wrap_string_for_mcnp(string, mcnp_version, is_first_line, suppress_blank_end=True)#

Wraps the list of the words to be a well formed MCNP input.

multi-line inputs will be handled by using the indentation format, and not the “&” method.

Parameters:

string (str) – A long string with new lines in it, that needs to be chunked appropriately for MCNP inputs
mcnp_version (tuple) – the tuple for the MCNP that must be formatted for.
is_first_line (bool) – If true this will be the beginning of an MCNP input. The first line will not be indented.
suppress_blank_end (bool) – Whether or not to suppress any blank lines that would be added to the end. Good for anywhere but cell modifiers in the cell block.

Returns:

A list of strings that can be written to an input file, one item to a line.

Return type:

list

static wrap_words_for_mcnp(words, mcnp_version, is_first_line)#

Wraps the list of the words to be a well formed MCNP input.

multi-line cards will be handled by using the indentation format, and not the “&” method.

Deprecated since version 0.2.0: The concept of words is deprecated, and should be handled by syntax trees now.

Parameters:

words (list) – A list of the “words” or data-grams that needed to added to this card. Each word will be separated by at least one space.
mcnp_version (tuple) – the tuple for the MCNP that must be formatted for.
is_first_line (bool) – If true this will be the beginning of an MCNP card. The first line will not be indented.

Returns:

A list of strings that can be written to an input file, one item to a line.

Return type:

list

Raises:

DeprecationWarning – raised always.