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[3.11] gh-90744: Fix erroneous doc links in the sys module (GH-101319) (#102321)
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com> Co-authored-by: Brad Wolfe <brad.wolfe@gmail.com> Co-authored-by: Furkan Onder <furkanonder@protonmail.com> Fix erroneous doc links in the sys module (#101319)
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‎Doc/library/sys.rst‎

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.. tabularcolumns:: |l|l|L|
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+---------------------+----------------+--------------------------------------------------+
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| attribute | float.h macro | explanation |
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+=====================+================+==================================================+
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| :const:`epsilon` | DBL_EPSILON | difference between 1.0 and the least value |
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| | | greater than 1.0 that is representable as a float|
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| | | |
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| | | See also :func:`math.ulp`. |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`dig` | DBL_DIG | maximum number of decimal digits that can be |
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| | | faithfully represented in a float; see below |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`mant_dig` | DBL_MANT_DIG | float precision: the number of base-``radix`` |
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| | | digits in the significand of a float |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`max` | DBL_MAX | maximum representable positive finite float |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`max_exp` | DBL_MAX_EXP | maximum integer *e* such that ``radix**(e-1)`` is|
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| | | a representable finite float |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`max_10_exp` | DBL_MAX_10_EXP | maximum integer *e* such that ``10**e`` is in the|
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| | | range of representable finite floats |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`min` | DBL_MIN | minimum representable positive *normalized* float|
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| | | |
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| | | Use :func:`math.ulp(0.0) <math.ulp>` to get the |
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| | | smallest positive *denormalized* representable |
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| | | float. |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`min_exp` | DBL_MIN_EXP | minimum integer *e* such that ``radix**(e-1)`` is|
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| | | a normalized float |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`min_10_exp` | DBL_MIN_10_EXP | minimum integer *e* such that ``10**e`` is a |
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| | | normalized float |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`radix` | FLT_RADIX | radix of exponent representation |
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+---------------------+----------------+--------------------------------------------------+
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| :const:`rounds` | FLT_ROUNDS | integer constant representing the rounding mode |
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| | | used for arithmetic operations. This reflects |
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| | | the value of the system FLT_ROUNDS macro at |
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| | | interpreter startup time. See section 5.2.4.2.2 |
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| | | of the C99 standard for an explanation of the |
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| | | possible values and their meanings. |
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+---------------------+----------------+--------------------------------------------------+
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+---------------------+---------------------+--------------------------------------------------+
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| attribute | float.h macro | explanation |
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+=====================+=====================+==================================================+
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| ``epsilon`` | ``DBL_EPSILON`` | difference between 1.0 and the least value |
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| | | greater than 1.0 that is representable as a float|
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| | | |
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| | | See also :func:`math.ulp`. |
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+---------------------+---------------------+--------------------------------------------------+
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| ``dig`` | ``DBL_DIG`` | maximum number of decimal digits that can be |
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| | | faithfully represented in a float; see below |
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+---------------------+---------------------+--------------------------------------------------+
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| ``mant_dig`` | ``DBL_MANT_DIG`` | float precision: the number of base-``radix`` |
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| | | digits in the significand of a float |
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+---------------------+---------------------+--------------------------------------------------+
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| ``max`` | ``DBL_MAX`` | maximum representable positive finite float |
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+---------------------+---------------------+--------------------------------------------------+
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| ``max_exp`` | ``DBL_MAX_EXP`` | maximum integer *e* such that ``radix**(e-1)`` is|
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| | | a representable finite float |
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+---------------------+---------------------+--------------------------------------------------+
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| ``max_10_exp`` | ``DBL_MAX_10_EXP`` | maximum integer *e* such that ``10**e`` is in the|
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| | | range of representable finite floats |
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+---------------------+---------------------+--------------------------------------------------+
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| ``min`` | ``DBL_MIN`` | minimum representable positive *normalized* float|
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| | | |
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| | | Use :func:`math.ulp(0.0) <math.ulp>` to get the |
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| | | smallest positive *denormalized* representable |
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| | | float. |
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+---------------------+---------------------+--------------------------------------------------+
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| ``min_exp`` | ``DBL_MIN_EXP`` | minimum integer *e* such that ``radix**(e-1)`` is|
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| | | a normalized float |
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+---------------------+---------------------+--------------------------------------------------+
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| ``min_10_exp`` | ``DBL_MIN_10_EXP`` | minimum integer *e* such that ``10**e`` is a |
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| | | normalized float |
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+---------------------+---------------------+--------------------------------------------------+
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| ``radix`` | ``FLT_RADIX`` | radix of exponent representation |
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+---------------------+---------------------+--------------------------------------------------+
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| ``rounds`` | ``FLT_ROUNDS`` | integer representing the rounding mode for |
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| | | floating-point arithmetic. This reflects the |
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| | | value of the system ``FLT_ROUNDS`` macro at |
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| | | interpreter startup time: |
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| | | ``-1`` indeterminable, |
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| | | ``0`` toward zero, |
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| | | ``1`` to nearest, |
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| | | ``2`` toward positive infinity, |
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| | | ``3`` toward negative infinity |
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| | | |
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| | | All other values for ``FLT_ROUNDS`` characterize |
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| | | implementation-defined rounding behavior. |
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+---------------------+---------------------+--------------------------------------------------+
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The attribute :attr:`sys.float_info.dig` needs further explanation. If
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``s`` is any string representing a decimal number with at most

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