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| -rw-r--r-- | Doc/reference/expressions.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst index 299ff5673e..c148533d9a 100644 --- a/Doc/reference/expressions.rst +++ b/Doc/reference/expressions.rst @@ -663,6 +663,14 @@ slots for which no default value is specified, a :exc:`TypeError` exception is raised. Otherwise, the list of filled slots is used as the argument list for the call. +.. note:: + + An implementation may provide builtin functions whose positional parameters do + not have names, even if they are 'named' for the purpose of documentation, and + which therefore cannot be supplied by keyword. In CPython, this is the case for + functions implemented in C that use :cfunc:`PyArg_ParseTuple` to parse their + arguments. + If there are more positional arguments than there are formal parameter slots, a :exc:`TypeError` exception is raised, unless a formal parameter using the syntax ``*identifier`` is present; in this case, that formal parameter receives a tuple |