some work on special method names

porting-code-to-python-3-with-2to3.html

@@ -31,11 +31,9 @@ td pre{padding:0;border:0}
 <h2 id=print><code>print</code> statement</h2>
 <p>In Python 2, <code>print</code> was a statement. Whatever you wanted to print simply followed the <code>print</code> keyword. In Python 3, <code>print()</code> is a function &mdash; whatever you want to print is passed to <code>print()</code> like any other function.
 <table>
-<tr>
-<th class=notes>Notes
-<th class=python2>Python 2
-<th class=python3>Python 3
-
+<tr><th>Notes
+<th>Python 2
+<th>Python 3
 <tr><th>&#x2460;
 <td><code>print</code>
 <td><code>print()</code>
@@ -65,7 +63,6 @@ td pre{padding:0;border:0}
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>u"PapayaWhip"</code>
 <td><code>"PapayaWhip"</code>
@@ -83,7 +80,6 @@ td pre{padding:0;border:0}
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>unicode(anything)</code>
 <td><code>str(anything)</code>
@@ -95,7 +91,6 @@ td pre{padding:0;border:0}
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>x = 1000000000000L</code>
 <td><code>x = 1000000000000</code>
@@ -125,7 +120,6 @@ td pre{padding:0;border:0}
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>if x &lt;> y:</code>
 <td><code>if x != y:</code>
@@ -143,7 +137,6 @@ td pre{padding:0;border:0}
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>a_dictionary.has_key("PapayaWhip")</code>
 <td><code>"PapayaWhip" in a_dictionary</code>
@@ -173,7 +166,6 @@ td pre{padding:0;border:0}
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>a_dictionary.keys()</code>
 <td><code>list(a_dictionary.keys())</code>
@@ -205,7 +197,6 @@ td pre{padding:0;border:0}
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>import httplib</code>
 <td><code>import http.client</code>
@@ -233,7 +224,6 @@ import CGIHttpServer</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>import urllib</code>
 <td><code>import urllib.request, urllib.parse, urllib.error</code>
@@ -271,7 +261,6 @@ from urllib.error import HTTPError</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>import dbm</code>
 <td><code>import dbm.ndbm</code>
@@ -295,7 +284,6 @@ import whichdb</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>import xmlrpclib</code>
 <td><code>import xmlrpc.client</code>
@@ -309,7 +297,6 @@ import SimpleXMLRPCServer</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><pre><code>try:
     import cStringIO as StringIO
@@ -372,7 +359,6 @@ except ImportError:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>import constants</code>
 <td><code>from . import constants</code>
@@ -390,7 +376,6 @@ except ImportError:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>anIterator.next()</code>
 <td><code>next(anIterator)</code>
@@ -430,7 +415,6 @@ for an_iterator in a_sequence_of_iterators:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>filter(a_function, a_sequence)</code>
 <td><code>list(filter(a_function, a_sequence))</code>
@@ -460,7 +444,6 @@ for an_iterator in a_sequence_of_iterators:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>map(a_function, 'PapayaWhip')</code>
 <td><code>list(map(a_function, 'PapayaWhip'))</code>
@@ -490,7 +473,6 @@ for an_iterator in a_sequence_of_iterators:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>reduce(a, b, c)</code>
 <td><pre><code>from functtools import reduce
@@ -505,7 +487,6 @@ reduce(a, b, c)</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>apply(a_function, a_list_of_args)</code>
 <td><code>a_function(*a_list_of_args)</code>
@@ -531,7 +512,6 @@ reduce(a, b, c)</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>intern(aString)</code>
 <td><code>sys.intern(aString)</code>
@@ -542,7 +522,6 @@ reduce(a, b, c)</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>exec codeString</code>
 <td><code>exec(codeString)</code>
@@ -564,7 +543,6 @@ reduce(a, b, c)</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>execfile("a_filename")</code>
 <td><code>exec(compile(open("a_filename").read(), "a_filename", "exec"))</code>
@@ -578,7 +556,6 @@ reduce(a, b, c)</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>`x`</code>
 <td><code>repr(x)</code>
@@ -596,7 +573,6 @@ reduce(a, b, c)</code></pre>
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><pre><code>try:
     import mymodule
@@ -643,7 +619,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>raise MyException</code>
 <td><i>unchanged</i>
@@ -669,7 +644,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>a_generator.throw(MyException)</code>
 <td><i>no change</i>
@@ -691,7 +665,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>xrange(10)</code>
 <td><code>range(10)</code>
@@ -721,7 +694,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>raw_input()</code>
 <td><code>input()</code>
@@ -743,7 +715,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>a_function.func_name</code>
 <td><code>a_function.__name__</code>
@@ -781,7 +752,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>for line in a_file.xreadlines():</code>
 <td><code>for line in a_file:</code>
@@ -800,7 +770,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>lambda (x,): x + f(x)</code>
 <td><code>lambda x1: x1[0] + f(x1[0])</code>
@@ -826,7 +795,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>aClassInstance.aClassMethod.im_func</code>
 <td><code>aClassInstance.aClassMethod.__func__</code>
@@ -843,7 +811,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><pre><code>class A:
     def __nonzero__(self):
@@ -867,7 +834,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>x = 0755</code>
 <td><code>x = 0o755</code>
@@ -878,7 +844,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>from sys import maxint</code>
 <td><code>from sys import maxsize</code>
@@ -896,7 +861,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>callable(anything)</code>
 <td><code>hasattr(anything, "__call__")</code>
@@ -907,7 +871,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>zip(a, b, c)</code>
 <td><code>list(zip(a, b, c))</code>
@@ -925,7 +888,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>x = StandardError()</code>
 <td><code>x = Exception()</code>
@@ -939,7 +901,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>types.StringType</code>
 <td><code>bytes</code>
@@ -965,7 +926,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>isinstance(x, (int, float, int))</code>
 <td><code>isinstance(x, (int, float))</code>
@@ -979,7 +939,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>isinstance(x, basestring)</code>
 <td><code>isinstance(x, str)</code>
@@ -990,7 +949,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><code>itertools.izip(a, b)</code>
 <td><code>zip(a, b)</code>
@@ -1016,7 +974,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>sys.exc_type</code>
 <td><code>sys.exc_info()[0]</code>
@@ -1033,7 +990,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>[i for i in 1, 2]</code>
 <td><code>[i for i in (1, 2)]</code>
@@ -1044,7 +1000,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>
 <td><code>os.getcwdu()</code>
 <td><code>os.getcwd()</code>
@@ -1055,7 +1010,6 @@ except:
 <tr><th>Notes
 <th>Python 2
 <th>Python 3
-
 <tr><th>&#x2460;
 <td><pre><code>class C(metaclass=PapayaMeta):
     pass</code></pre>
@@ -1158,7 +1112,7 @@ do_stuff(a_list)</code></pre>
 do_stuff(a_list)</code></pre>
 </table>
 <p>FIXME: once the rest of the book is written, this appendix should contain copious links back to any chapter or section that touches on these features.
-<p class=nav><a rel=prev href=case-study-porting-chardet-to-python-3.html title="back to &#8220;Case Study: Porting chardet to Python 3&#8221;"><span>&#x261C;</span></a> <a rel=next class=todo><span>&#x261E;</span></a>
+<p class=nav><a rel=prev href=case-study-porting-chardet-to-python-3.html title="back to &#8220;Case Study: Porting chardet to Python 3&#8221;"><span>&#x261C;</span></a> <a rel=next href=special-method-names.html title="onward to &#8220;Special Method Names&#8221;"><span>&#x261E;</span></a>
 <p class=c>&copy; 2001&ndash;9 <a href=about.html>Mark Pilgrim</a>
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