summaryrefslogtreecommitdiffstats
path: root/Doc/library/functions.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Doc/library/functions.rst')
-rw-r--r--Doc/library/functions.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index f835dcf..3fcd694 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -247,6 +247,13 @@ are always available. They are listed here in alphabetical order.
the function serves as a numeric conversion function like :func:`int`
and :func:`float`. If both arguments are omitted, returns ``0j``.
+ .. note::
+
+ When converting from a string, the string must not contain whitespace
+ around the central ``+`` or ``-`` operator. For example,
+ ``complex('1+2j')`` is fine, but ``complex('1 + 2j')`` raises
+ :exc:`ValueError`.
+
The complex type is described in :ref:`typesnumeric`.