Exercise: Chapter 3 (14-17)
14.
Using words.sort():
>>> words =["banana", "pineapple", "peach", "apple", "orange", "mango", "maron", "nuts"] >>> words ['banana', 'pineapple', 'peach', 'apple', 'orange', 'mango', 'maron', 'nuts'] >>> words.sort() >>> words ['apple', 'banana', 'mango', 'maron', 'nuts', 'orange', 'peach', 'pineapple']
After sorting, the sequence in the list was sorted permanently.
Using sorted(words):
>>> words =["banana", "pineapple", "peach", "apple", "orange", "mango", "maron", "nuts"] >>> sorted(words) ['apple', 'banana', 'mango', 'maron', 'nuts', 'orange', 'peach', 'pineapple'] >>> words ['banana', 'pineapple', 'peach', 'apple', 'orange', 'mango', 'maron', 'nuts']
This sorting is just temporary.
15.
>>> "3" * 7 '3333333' >>> 3 * 7 21 >>> int("3") * 7 21 >>> str(3) * 7 '3333333' >>>
16.
>>> monty Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'monty' is not defined >>> from test import msg Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: cannot import name msg >>> from test import * >>> monty 'Monty Python'
17.
In general, if using positive values, the display will be aligned to right. For negative, it will be left aligned.
>>> string = 'abc' >>> print '%6s' % string abc >>> print '%-6s' % string abc >>> string = 'abcdefghijk' >>> print '%6s' % string abcdefghijk >>> print '%-6s' % string abcdefghijk >>>
There is no difference to display longer than 6.