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Diffstat (limited to 'LectureNotesOnPython.html')
| -rw-r--r-- | LectureNotesOnPython.html | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/LectureNotesOnPython.html b/LectureNotesOnPython.html index 4333633..eb0b066 100644 --- a/LectureNotesOnPython.html +++ b/LectureNotesOnPython.html @@ -815,7 +815,7 @@ A list of objects</dd> <p>'a' in 'banana' 'seed' in 'banana'</p> <p>练习：写出下面的函数，使得 -in_both('apples', 'oranges')返回'aes'</p> +in_both('apples', 'oranges')返回'aes'。</p> </div> <div class="section" id="id7"> <h1><a class="toc-backref" href="#id29">字符串比较</a></h1> @@ -1170,6 +1170,7 @@ error-prone（易错）</p> <span class="keyword">for</span> <span class="name">x</span> <span class="operator word">in</span> <span class="name">lst</span><span class="punctuation">:</span> <span class="keyword">print</span><span class="punctuation">(</span><span class="literal string single">'</span><span class="literal string interpol">%s</span><span class="literal string single"> (</span><span class="literal string interpol">%d</span><span class="literal string single">)'</span> <span class="operator">%</span> <span class="punctuation">(</span><span class="name">x</span><span class="punctuation">[</span><span class="literal number integer">0</span><span class="punctuation">],</span> <span class="name">x</span><span class="punctuation">[</span><span class="literal number integer">1</span><span class="punctuation">]))</span> </pre> +<p>练习： 改写函数 <tt class="docutils literal">word_frequency</tt> ， 使它能接受第三个参数， <tt class="docutils literal">black_lst</tt>。 <tt class="docutils literal">black_lst</tt> 是包含要排除考虑的单词的列表。 例如， <tt class="docutils literal">black_lst</tt> 可以是 <tt class="docutils literal">['the', 'and', 'of', 'to']</tt> 。</p> </div> <div class="section" id="keyvalue"> <h2><a class="toc-backref" href="#id37">key与value互换</a></h2> |