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| -rw-r--r-- | Doc/reference/datamodel.rst | 18 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Documentation/2020-01-22-05-14-53.bpo-39416.uYjhEm.rst | 1 |
2 files changed, 19 insertions, 0 deletions
diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst index 29e64cba2ca..d9b72a9a942 100644 --- a/Doc/reference/datamodel.rst +++ b/Doc/reference/datamodel.rst @@ -187,6 +187,24 @@ Ellipsis related to mathematical numbers, but subject to the limitations of numerical representation in computers. + The string representations of the Numeric classes, computed by + :meth:`__repr__` and :meth:`__str__`, have the following + properties: + + * They are valid numeric literals which, when passed to their + class constructor, produce an object having the value of the + original numeric. + + * The representation is in base 10, when possible. + + * Leading zeros, possibly excepting a single zero before a + decimal point, are not shown. + + * Trailing zeros, possibly excepting a single zero after a + decimal point, are not shown. + + * A sign is shown only when the number is negative. + Python distinguishes between integers, floating point numbers, and complex numbers: diff --git a/Misc/NEWS.d/next/Documentation/2020-01-22-05-14-53.bpo-39416.uYjhEm.rst b/Misc/NEWS.d/next/Documentation/2020-01-22-05-14-53.bpo-39416.uYjhEm.rst new file mode 100644 index 00000000000..279a5f18ff8 --- /dev/null +++ b/Misc/NEWS.d/next/Documentation/2020-01-22-05-14-53.bpo-39416.uYjhEm.rst @@ -0,0 +1 @@ +Document some restrictions on the default string representations of numeric classes. |