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copied!<p>Starting in Python 2.6, there is an alternative: the <code>str.format()</code> method. Here are some examples using the existing string format operator (<code>%</code>):</p> <pre><code>>>> "Name: %s, age: %d" % ('John', 35) 'Name: John, age: 35' >>> i = 45 >>> 'dec: %d/oct: %#o/hex: %#X' % (i, i, i) 'dec: 45/oct: 055/hex: 0X2D' >>> "MM/DD/YY = %02d/%02d/%02d" % (12, 7, 41) 'MM/DD/YY = 12/07/41' >>> 'Total with tax: $%.2f' % (13.00 * 1.0825) 'Total with tax: $14.07' >>> d = {'web': 'user', 'page': 42} >>> 'http://xxx.yyy.zzz/%(web)s/%(page)d.html' % d 'http://xxx.yyy.zzz/user/42.html' </code></pre> <p>Here are the equivalent snippets but using <code>str.format()</code>:</p> <pre><code>>>> "Name: {0}, age: {1}".format('John', 35) 'Name: John, age: 35' >>> i = 45 >>> 'dec: {0}/oct: {0:#o}/hex: {0:#X}'.format(i) 'dec: 45/oct: 0o55/hex: 0X2D' >>> "MM/DD/YY = {0:02d}/{1:02d}/{2:02d}".format(12, 7, 41) 'MM/DD/YY = 12/07/41' >>> 'Total with tax: ${0:.2f}'.format(13.00 * 1.0825) 'Total with tax: $14.07' >>> d = {'web': 'user', 'page': 42} >>> 'http://xxx.yyy.zzz/{web}/{page}.html'.format(**d) 'http://xxx.yyy.zzz/user/42.html' </code></pre> <p>Like Python 2.6+, all Python 3 releases (so far) understand how to do both. I shamelessly ripped this stuff straight out of <a href="http://amzn.com/0132269937" rel="nofollow noreferrer">my hardcore Python intro book</a> and the slides for the Intro+Intermediate <a href="http://cyberwebconsulting.com" rel="nofollow noreferrer">Python courses I offer</a> from time-to-time. <code>:-)</code></p> <p><strong>Aug 2018 UPDATE</strong>: Of course, now that we have <a href="https://docs.python.org/3/whatsnew/3.6.html#whatsnew36-pep498" rel="nofollow noreferrer">the f-string feature in 3.6</a>, we need the equivalent examples of <em>that</em>, yes another alternative:</p> <pre><code>>>> name, age = 'John', 35 >>> f'Name: {name}, age: {age}' 'Name: John, age: 35' >>> i = 45 >>> f'dec: {i}/oct: {i:#o}/hex: {i:#X}' 'dec: 45/oct: 0o55/hex: 0X2D' >>> m, d, y = 12, 7, 41 >>> f"MM/DD/YY = {m:02d}/{d:02d}/{y:02d}" 'MM/DD/YY = 12/07/41' >>> f'Total with tax: ${13.00 * 1.0825:.2f}' 'Total with tax: $14.07' >>> d = {'web': 'user', 'page': 42} >>> f"http://xxx.yyy.zzz/{d['web']}/{d['page']}.html" 'http://xxx.yyy.zzz/user/42.html' </code></pre>

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