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reduce(): Clarified what is returned in the case of a sequence 1 item long and 

initial/default value.
This commit is contained in:
Fred Drake 2002-07-17 13:55:33 +00:00
parent 1f4fed68e9
commit 2095b9690f
1 changed files with 6 additions and 6 deletions
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12
Doc/lib/libfuncs.tex
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@ -717,12 +717,12 @@ def my_import(name):
\begin{funcdesc}{reduce}{function, sequence\optional{, initializer}}
Apply \var{function} of two arguments cumulatively to the items of
\var{sequence}, from left to right, so as to reduce the sequence to
a single value. For example,
\code{reduce(lambda x, y: x+y, [1, 2, 3, 4, 5])} calculates
\code{((((1+2)+3)+4)+5)}.
If the optional \var{initializer} is present, it is placed before
the items of the sequence in the calculation, and serves as a
default when the sequence is empty.
a single value. For example, \code{reduce(lambda x, y: x+y, [1, 2,
3, 4, 5])} calculates \code{((((1+2)+3)+4)+5)}. If the optional
\var{initializer} is present, it is placed before the items of the
sequence in the calculation, and serves as a default when the
sequence is empty. If \var{initializer} is not given and
\var{sequence} contains only one item, the first item is returned.
\end{funcdesc}
\begin{funcdesc}{reload}{module}