http://wiki.christophchamp.com/index.php?action=history&feed=atom&title=Talk%3APython 2026-05-23T12:54:17Z Revision history for this page on the wiki MediaWiki 1.26.2 http://wiki.christophchamp.com/index.php?title=Talk:Python&diff=5817&oldid=prev 2012-12-08T01:49:11Z

<p>New page: &lt;!-- EXAMPLES hello = &quot;hello&quot; hello[::-1] reversed(hello) s = &#039;&#039;.join(reversed(hello)) s = [&#039;o&#039;, &#039;l&#039;, &#039;l&#039;, &#039;e&#039;, &#039;h&#039;] &quot;&quot;.join(s) ( x for x in xrange(0, 10) if not x%2 ) def infnum(): ...</p> <p><b>New page</b></p><div>&lt;!-- EXAMPLES<br /> hello = &quot;hello&quot;<br /> hello[::-1]<br /> reversed(hello)<br /> s = ''.join(reversed(hello))<br /> s = ['o', 'l', 'l', 'e', 'h']<br /> &quot;&quot;.join(s)<br /> <br /> ( x for x in xrange(0, 10) if not x%2 )<br /> <br /> def infnum():<br /> num = 0<br /> while True:<br /> yield num<br /> num+=1<br /> num = infnum()<br /> ( n for n in xrange() )<br /> <br /> &gt;&gt;&gt; Fraction(1, 2)<br /> &lt;Fraction: 1/2&gt;<br /> '{0}'.format(F)<br /> <br /> str(Fraction(1,2))<br /> assert ( Fraction(1,2) + Fraction(1,4) ).numerator == 6<br /> <br /> class Fraction(object):<br /> def __init__(self, numerator, denominator):<br /> self.numerator = numerator<br /> self.denom = denom<br /> <br /> def __add__(self, other):<br /> numerator = self.numerator * other.denominator + other.numerator * self.denominator<br /> denominator = self.denominator * other.denominator<br /> return Fraction(numerator, denominator)<br /> <br /> def __eq__(self, other):<br /> return bool(self.numerator == other.numerator &amp;&amp; self.denominator == self.denominator)<br /> <br /> def __repr__(self):<br /> return '&lt;Fraction {0}/{1}&gt;'.format(self.numerator, self.denom)<br /> <br /> F = Fraction(1, 2)<br /> assert F.numerator == 1<br /> assert F.denom == 2<br /> <br /> comment = &quot;Hello Christoph bad word ASS&quot;<br /> bad_words = ['word', 'awesome', '@@@@@', 'ass']<br /> bad_words = set(bad_words)<br /> <br /> def has_bad_word(text):<br /> words = text.split(' ')<br /> words = set([word.lower() for word in words])<br /> return bool(words &amp; bad_words)<br /> <br /> O(N*M) where n == number of words in comment, and m == number of bad words<br /> <br /> class Author(models.Model):<br /> name = models.CharField(max_length=50, db_index=True)<br /> <br /> class Book(models.Model):<br /> id = integer<br /> title = models.CharField(max_length=100)<br /> pub_date = models.DateField()<br /> <br /> Book.objects.filter(author__name__startswith=&quot;M&quot;)<br /> SELECT * from book INNER JOIN ON(book.author_id = author.id ) where author.name LIKE M%<br /> <br /> for book in Book.objects.select_related('author').all():<br /> print book.author.name<br /> --&gt;</div>

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