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-rw-r--r--Doc/tutorial/datastructures.rst53
1 files changed, 28 insertions, 25 deletions
diff --git a/Doc/tutorial/datastructures.rst b/Doc/tutorial/datastructures.rst
index b39bdf4dfb..953a68b44a 100644
--- a/Doc/tutorial/datastructures.rst
+++ b/Doc/tutorial/datastructures.rst
@@ -60,11 +60,16 @@ objects:
Remove all items from the list. Equivalent to ``del a[:]``.
-.. method:: list.index(x)
+.. method:: list.index(x[, start[, end]])
:noindex:
- Return the index in the list of the first item whose value is *x*. It is an
- error if there is no such item.
+ Return zero-based index in the list of the first item whose value is *x*.
+ Raises a :exc:`ValueError` if there is no such item.
+
+ The optional arguments *start* and *end* are interpreted as in the slice
+ notation and are used to limit the search to a particular subsequence of
+ *x*. The returned index is computed relative to the beginning of the full
+ sequence rather than the *start* argument.
.. method:: list.count(x)
@@ -94,28 +99,26 @@ objects:
An example that uses most of the list methods::
- >>> a = [66.25, 333, 333, 1, 1234.5]
- >>> print(a.count(333), a.count(66.25), a.count('x'))
- 2 1 0
- >>> a.insert(2, -1)
- >>> a.append(333)
- >>> a
- [66.25, 333, -1, 333, 1, 1234.5, 333]
- >>> a.index(333)
- 1
- >>> a.remove(333)
- >>> a
- [66.25, -1, 333, 1, 1234.5, 333]
- >>> a.reverse()
- >>> a
- [333, 1234.5, 1, 333, -1, 66.25]
- >>> a.sort()
- >>> a
- [-1, 1, 66.25, 333, 333, 1234.5]
- >>> a.pop()
- 1234.5
- >>> a
- [-1, 1, 66.25, 333, 333]
+ >>> fruits = ['orange', 'apple', 'pear', 'banana', 'kiwi', 'apple', 'banana']
+ >>> fruits.count('apple')
+ 2
+ >>> fruits.count('tangerine')
+ 0
+ >>> fruits.index('banana')
+ 3
+ >>> fruits.index('banana', 4) # Find next banana starting a position 4
+ 6
+ >>> fruits.reverse()
+ >>> fruits
+ ['banana', 'apple', 'kiwi', 'banana', 'pear', 'apple', 'orange']
+ >>> fruits.append('grape')
+ >>> fruits
+ ['banana', 'apple', 'kiwi', 'banana', 'pear', 'apple', 'orange', 'grape']
+ >>> fruits.sort()
+ >>> fruits
+ ['apple', 'apple', 'banana', 'banana', 'grape', 'kiwi', 'orange', 'pear']
+ >>> fruits.pop()
+ 'pear'
You might have noticed that methods like ``insert``, ``remove`` or ``sort`` that
only modify the list have no return value printed -- they return the default