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authorGeorg Brandl <georg@python.org>2009-06-08 18:59:09 (GMT)
committerGeorg Brandl <georg@python.org>2009-06-08 18:59:09 (GMT)
commit7ae90dd22d4a8e2fbf49c4fd0be9cc88bb852fee (patch)
tree8971da88453ee050e573d749a6a4728da3487245 /Doc
parent1b8b7183abc265f3bc47a6ce9028eebdcb42b1f0 (diff)
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Elaborate encoding recommendations, and fix ambiguous wording for list comprehensions.
Diffstat (limited to 'Doc')
-rw-r--r--Doc/tutorial/controlflow.rst7
-rw-r--r--Doc/tutorial/datastructures.rst15
2 files changed, 13 insertions, 9 deletions
diff --git a/Doc/tutorial/controlflow.rst b/Doc/tutorial/controlflow.rst
index e266a04..5e4de0e 100644
--- a/Doc/tutorial/controlflow.rst
+++ b/Doc/tutorial/controlflow.rst
@@ -675,7 +675,12 @@ extracted for you:
(see :ref:`tut-firstclasses` for more on classes and methods).
* Don't use fancy encodings if your code is meant to be used in international
- environments. Plain ASCII works best in any case.
+ environments. Python's default, UTF-8, or even plain ASCII work best in any
+ case.
+
+* Likewise, don't use non-ASCII characters in identifiers if there is only the
+ slightest chance people speaking a different language will read or maintain
+ the code.
.. rubric:: Footnotes
diff --git a/Doc/tutorial/datastructures.rst b/Doc/tutorial/datastructures.rst
index 02b08d9..c204075 100644
--- a/Doc/tutorial/datastructures.rst
+++ b/Doc/tutorial/datastructures.rst
@@ -162,12 +162,11 @@ Common applications are to make lists where each element is the result of
some operations applied to each member of the sequence, or to create a
subsequence of those elements that satisfy a certain condition.
-
-Each list comprehension consists of an expression followed by a :keyword:`for`
-clause, then zero or more :keyword:`for` or :keyword:`if` clauses. The result
-will be a list resulting from evaluating the expression in the context of the
-:keyword:`for` and :keyword:`if` clauses which follow it. If the expression
-would evaluate to a tuple, it must be parenthesized.
+A list comprehension consists of brackets containing an expression followed
+by a :keyword:`for` clause, then zero or more :keyword:`for` or :keyword:`if`
+clauses. The result will be a list resulting from evaluating the expression in
+the context of the :keyword:`for` and :keyword:`if` clauses which follow it. If
+the expression would evaluate to a tuple, it must be parenthesized.
Here we take a list of numbers and return a list of three times each number::
@@ -348,8 +347,8 @@ The reverse operation is also possible::
>>> x, y, z = t
This is called, appropriately enough, *sequence unpacking* and works for any
-sequence on the right-hand side. Sequence unpacking requires the list of
-variables on the left to have the same number of elements as the length of the
+sequence on the right-hand side. Sequence unpacking requires that there are as
+many variables on the left side of the equals sign as there are elements in the
sequence. Note that multiple assignment is really just a combination of tuple
packing and sequence unpacking.