bdf/field_writer Package
This is the pyNastran.bdf.field_writer.rst file.
field_writer Module
Defines legacy import functions
- pyNastran.bdf.field_writer.print_card(fields, size=8, is_double=False)[source]
Prints a card in 8-character of 16-character Nastran format.
- Parameters:
- fieldslist[int/float/str/None]
all the fields in the BDF card (no trailing Nones)
- sizeint; default=8
the size of the field (8/16)
- is_doublebool; default=False
is the card double precision? Double precision applies to specific cards and turns 1.234E+5 into 1.234D+5. Applies to GRID, Coord only?
- Returns:
- cardstr
string representation of the card
Note
be careful of using is_double on cards that aren’t GRID or Coord
field_writer_8 Module
Defines functions for single precision 8 character field writing.
- pyNastran.bdf.field_writer_8.is_same(value1: Any, value2: Any) bool[source]
Checks to see if 2 values are the same
Note
this method is used by almost every card when printing
- pyNastran.bdf.field_writer_8.print_card_8(fields: list[int | float | str | None]) str[source]
Prints a nastran-style card with 8-character width fields.
- Parameters:
- fieldslist[int/float/str/None]
all the fields in the BDF card (no trailing Nones)
- Returns:
- cardstr
string representation of the card in small field format
Note
An internal field value of None or ‘’ will be treated as a blank field
Note
A small field format follows the 8-8-8-8-8-8-8-8 = 80 format where the first 8 is the card name or blank (continuation). The last 8-character field indicates an optional continuation, but because it’s a left-justified unnecessary field, print_card doesn’t use it.
- pyNastran.bdf.field_writer_8.print_field_8(value: int | float | str | None) str[source]
Prints an 8-character width field
- Parameters:
- valueint/float/str
the value to print
- Returns:
- fieldstr
an 8-character string
- pyNastran.bdf.field_writer_8.print_float_8(value: float) str[source]
Prints a float in nastran 8-character width syntax using the highest precision possbile.
- pyNastran.bdf.field_writer_8.print_int_card(fields: list[int | float | str | None]) str[source]
Prints a nastran-style card with 8-character width fields. All fields (other than the first field) must be integers. This is used to speed up SET cards.
- Parameters:
- fieldslist[int/float/str/None]
The list of fields to write to a nastran card.
- .. warning::
Blanks are not allowed! Floats and strings are not allowed.
- .. code-block:: python
fields = [‘SET’, 1, 2, 3, 4, 5, 6, …, n] print_int_card(fields) >>> fields ‘SET1, 1, 2, 3, 4, 5, 6, …’ ‘ , n’
- pyNastran.bdf.field_writer_8.print_int_card_blocks(fields_blocks: list[Any]) str[source]
Prints a nastran-style card with 8-character width fields. All fields other than the card name must be written in “block” format. This is used to speed up SET cards.
- Parameters:
- fields_blockslist[int]
The fields written in “block” notation.
- Returns:
- msgstr
the field blocks as an 8-character width Nastran card
Note
Blanks are allowed in the False block.
fields_blocks = [ 'SET1', [['a', 1.0, 3], False], # these are not all integers [[1, 2, 3], True], # these are all integers ] msg = print_int_card_blocks(fields_blocks) print(msg) >>> 'SET1 a 1. 3 1 2 3
- ‘
- pyNastran.bdf.field_writer_8.print_scientific_8(value: float) str[source]
Prints a value in 8-character scientific notation. This is a sub-method and shouldn’t typically be called
Notes
print_float_8 : a better float printing method
- pyNastran.bdf.field_writer_8.set_blank_if_default(value: Any, default: Any) int | float | str | None[source]
Used when setting the output data of a card to clear default values
- Parameters:
- valueint/float/str
the field value the may be set to None (blank) if value=default, the default value for the field
- defaultint/float/str
the default value
- .. note:: this method is used by almost every card when printing
field_writer_16 Module
Defines functions for single precision 16 character field writing.
- pyNastran.bdf.field_writer_16.print_card_16(fields: list[int | float | str | None], wipe_fields: bool = True) str[source]
Prints a nastran-style card with 16-character width fields.
- Parameters:
- fieldslist[varies]
all the fields in the BDF card (no trailing Nones)
- wipe_fieldsbool; default=True
some cards (e.g. PBEAM) have ending fields that need to be there, others cannot have them.
- Returns:
- cardstr
string representation of the card in small field format
Note
An internal field value of None or ‘’ will be treated as a blank field
Note
A large field format follows the 8-16-16-16-16-8 = 80 format where the first 8 is the card name or blank (continuation). The last 8-character field indicates an optional continuation, but because it’s a left-justified unnecessary field, print_card doesn’t use it.
- pyNastran.bdf.field_writer_16.print_field_16(value: int | float | str | None) str[source]
Prints a 16-character width field
- Parameters:
- valueint / float / str / None
the value to print
- Returns:
- fieldstr
an 16-character string
- pyNastran.bdf.field_writer_16.print_float_16(value: float) str[source]
Prints a float in nastran 16-character width syntax using the highest precision possbile. .. seealso:: print_float_8
field_writer_double Module
Defines functions for double precision 16 character field writing.
- pyNastran.bdf.field_writer_double.print_card_double(fields: list[int | float | str | None], wipe_fields: bool = True) str[source]
Prints a nastran-style card with 16-character width fields.
- Parameters:
- fieldslist[varies]
all the fields in the BDF card (no trailing Nones)
- wipe_fieldsbool; default=True
some cards (e.g. PBEAM) have ending fields that need to be there, others cannot have them.
- Returns:
- cardstr
string representation of the card in small field format
Note
An internal field value of None or ‘’ will be treated as a blank field
Note
A large field format follows the 8-16-16-16-16-8 = 80 format where the first 8 is the card name or blank (continuation). The last 8-character field indicates an optional continuation, but because it’s a left-justified unnecessary field, print_card doesn’t use it.