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Mark Pilgrim
2009-03-12 23:48:39 -04:00
parent 43018795dc
commit ac4b1f80fa
9 changed files with 6 additions and 15 deletions
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about.html
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h1:before{content:""}
</style>
</head>
<body>
<form action=http://www.google.com/cse id=search><div><input type=hidden name=cx value=014021643941856155761:l5eihuescdw><input type=hidden name=ie value=UTF-8><input name=q size=31>&nbsp;<input type=submit name=sa value=Search></div></form>
<p class=nav>You are here: <a href=/>Home</a> <span>&#8227;</span> <a href=table-of-contents.html>Dive Into Python 3</a> <span>&#8227;</span>
<h1>About the book</h1>
case-study-porting-chardet-to-python-3.html
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body{counter-reset:h1 20}
</style>
</head>
<body>
<p class=skip><a href=#divingin>skip to main content</a>
<form action=http://www.google.com/cse id=search><div><input type=hidden name=cx value=014021643941856155761:l5eihuescdw><input type=hidden name=ie value=UTF-8>&nbsp;<input name=q size=31>&nbsp;<input type=submit name=sa value=Search></div></form>
<p class=nav>You are here: <a href=/>Home</a> <span>&#8227;</span> <a href=table-of-contents.html#case-study-porting-chardet-to-python-3>Dive Into Python 3</a> <span>&#8227;</span>
@@ -46,7 +45,7 @@ body{counter-reset:h1 20}
<li><a href=#cantconvertbytesobject>Can&#8217;t convert <code>'bytes'</code> object to <code>str</code> implicitly</a>
<li><a href=#unsupportedoperandtypeforplus>Unsupported operand type(s) for +: <code>'int'</code> and <code>'bytes'</code></a>
<li><a href=#ordexpectedstring><code>ord()</code> expected string of length 1, but <code>int</code> found</a>
<li><a href=#=unorderabletypes>Unorderable types: <code>int()</code> >= <code>str()</code></a>
<li><a href=#unorderabletypes>Unorderable types: <code>int()</code> >= <code>str()</code></a>
<li><a href=#reduceisnotdefined>Global name <code>'reduce'</code> is not defined</a>
</ol>
<li><a href=#summary>Summary</a>
@@ -873,7 +872,7 @@ TypeError: unsupported operand type(s) for +: 'int' and 'bytes'</samp></pre>
<samp>&lt;class 'int'></samp>
<a><samp class=prompt>>>> </samp><kbd>mLastChar + aBuf</kbd> <span>&#x2463;</span></a>
<samp class=traceback>Traceback (most recent call last):
File "<stdin>", line 1, in &lt;module>
File "&lt;stdin>", line 1, in &lt;module>
TypeError: unsupported operand type(s) for +: 'int' and 'bytes'</samp>
<a><samp class=prompt>>>> </samp><kbd>mLastChar = aBuf[-1:]</kbd> <span>&#x2464;</span></a>
<samp class=prompt>>>> </samp><kbd>mLastChar</kbd>
@@ -961,14 +960,14 @@ def feed(self, aBuf):
<p id=skip-sbcharsetprober-code>&hellip;and <code>latin1prober.py</code>&hellip;
<p class=skip><a href=#skip-latin1prober-code>skip over this code listing</a>
<p class=skip><a href=#skip-latin1prober-code-2>skip over this code listing</a>
<pre><code># latin1prober.py
def feed(self, aBuf):
aBuf = self.filter_with_english_letters(aBuf)
for c in aBuf:
<mark> charClass = Latin1_CharToClass[ord(c)]</mark></code></pre>
<p id=skip-sbcharsetprober-code><var>c</var> is iterating over <var>aBuf</var>, which means it is an integer, not a 1-character string. The solution is the same: change <code>ord(c)</code> to just plain <code>c</code>.
<p id=skip-sbcharsetprober-code-2><var>c</var> is iterating over <var>aBuf</var>, which means it is an integer, not a 1-character string. The solution is the same: change <code>ord(c)</code> to just plain <code>c</code>.
<p class=skip><a href=#unorderabletypes>skip over this code listing</a>
<pre><code> # sbcharsetprober.py
@@ -1010,7 +1009,7 @@ tests\Big5\0804.blogspot.com.xml</samp>
File "C:\home\chardet\chardet\jpcntx.py", line 145, in feed
order, charLen = self.get_order(aBuf[i:i+2])
File "C:\home\chardet\chardet\jpcntx.py", line 176, in get_order
if ((aStr[0] >= '\x81') and (aStr[0] <= '\x9F')) or \
if ((aStr[0] >= '\x81') and (aStr[0] &lt;= '\x9F')) or \
TypeError: unorderable types: int() >= str()</samp></pre>
<p id=skip-unorderable-types-screen>Did you notice? This time around, the code passed the first test case (<code>tests\ascii\howto.diveintomark.org.xml</code>). You're making real progress here.
@@ -1036,7 +1035,7 @@ TypeError: unorderable types: int() >= str()</samp></pre>
.
.
i = self._mNeedToSkipCharNum
while i < aLen:
while i &lt; aLen:
<mark> order, charLen = self.get_order(aBuf[i:i+2])</mark></code></pre>
<p id=skip-unorderable-types-2>Oh look, it's our old friend, <var>aBuf</var>. As you might have guessed from every other issue we've encountered in this chapter, <var>aBuf</var> is a byte array. Here, the <code>feed()</code> method isn't just passing it on wholesale; it's slicing it. But as you saw <a href=#unsupportedoperandtypeforplus>earlier in this chapter</a>, slicing a byte array returns a byte array, so the <var>aStr</var> parameter that gets passed to the <code>get_order()</code> method is still a byte array.
index.html
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li.todo{background:white;color:gainsboro}
</style>
</head>
<body>
<form action=http://www.google.com/cse id=search><div><input type=hidden name=cx value=014021643941856155761:l5eihuescdw><input type=hidden name=ie value=UTF-8><input name=q size=31>&nbsp;<input type=submit name=sa value=Search></div></form>
<p class=first><cite>Dive Into Python 3</cite> will cover Python 3 and its differences from Python 2. Compared to the original <cite><a href=http://diveintopython.org/>Dive Into Python</a></cite>, it will be about 50% revised and 50% new material. I will publish drafts online as I go. The final version will be published on paper by Apress. The book will remain online under the <a rel=license href=http://creativecommons.org/licenses/by-sa/3.0/>CC-BY-SA-3.0</a> license.
<p>You can see the <a href=table-of-contents.html>full table of contents</a> (<strong>not finalized</strong>), or read what I&#8217;ve written so far:</p>
native-datatypes.html
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body{counter-reset:h1 2}
</style>
</head>
<body>
<p class=skip><a href=#divingin>skip to main content</a>
<form action=http://www.google.com/cse id=search><div><input type=hidden name=cx value=014021643941856155761:l5eihuescdw><input type=hidden name=ie value=UTF-8>&nbsp;<input name=q size=31>&nbsp;<input type=submit name=root value=Search></div></form>
<p class=nav>You are here: <a href=/>Home</a> <span>&#8227;</span> <a href=table-of-contents.html#native-datatypes>Dive Into Python 3</a> <span>&#8227;</span>
porting-code-to-python-3-with-2to3.html
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h3:before{counter-increment:h3;content:"A." counter(h2) "." counter(h3) ". "}
</style>
</head>
<body>
<p class=skip><a href=#divingin>skip to main content</a>
<form action=http://www.google.com/cse id=search><div><input type=hidden name=cx value=014021643941856155761:l5eihuescdw><input type=hidden name=ie value=UTF-8>&nbsp;<input name=q size=31>&nbsp;<input type=submit name=sa value=Search></div></form>
<p class=nav>You are here: <a href=/>Home</a> <span>&#8227;</span> <a href=table-of-contents.html#porting-code-to-python-3-with-2to3>Dive Into Python 3</a> <span>&#8227;</span>
regular-expressions.html
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body{counter-reset:h1 4}
</style>
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<p class=skip><a href=#divingin>skip to main content</a>
<form action=http://www.google.com/cse id=search><div><input type=hidden name=cx value=014021643941856155761:l5eihuescdw><input type=hidden name=ie value=UTF-8>&nbsp;<input name=q size=31>&nbsp;<input type=submit name=root value=Search></div></form>
<p class=nav>You are here: <a href=/>Home</a> <span>&#8227;</span> <a href=table-of-contents.html#regular-expressions>Dive Into Python 3</a> <span>&#8227;</span>
table-of-contents.html
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ul li ol{margin:0;padding:0 0 0 2.5em}
</style>
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<body>
<form action=http://www.google.com/cse id=search><div><input type=hidden name=cx value=014021643941856155761:l5eihuescdw><input type=hidden name=ie value=UTF-8><input name=q size=31>&nbsp;<input type=submit name=sa value=Search></div></form>
<p class=nav>You are here: <a href=/>Home</a> <span>&#8227;</span> Dive Into Python 3 <span>&#8227;</span>
<h1>Table of contents</h1>
unit-testing.html
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body{counter-reset:h1 7}
</style>
</head>
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<p class=skip><a href=#divingin>skip to main content</a>
<form action=http://www.google.com/cse id=search><div><input type=hidden name=cx value=014021643941856155761:l5eihuescdw><input type=hidden name=ie value=UTF-8>&nbsp;<input name=q size=31>&nbsp;<input type=submit name=root value=Search></div></form>
<p class=nav>You are here: <a href=/>Home</a> <span>&#8227;</span> <a href=table-of-contents.html#unit-testing>Dive Into Python 3</a> <span>&#8227;</span>
your-first-python-program.html
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body{counter-reset:h1 1}
</style>
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<form action=http://www.google.com/cse id=search><div><input type=hidden name=cx value=014021643941856155761:l5eihuescdw><input type=hidden name=ie value=UTF-8>&nbsp;<input name=q size=31>&nbsp;<input type=submit name=sa value=Search></div></form>
<p class=nav>You are here: <a href=/>Home</a> <span>&#8227;</span> <a href=table-of-contents.html#your-first-python-program>Dive Into Python 3</a> <span>&#8227;</span>