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Further methods that run on lists - looking things up
More on Collections and Sequences example from a Well House Consultants training course
More on More on Collections and Sequences [link] Source code: furlist.py Module: Y111
#!/usr/bin/env python
values = [1,1,2,3,5,8,13,21,35,56,91] print "Information on our list ...." print values print "List length = "+str(len(values)) print "List elements with value 8 = "+str(values.count(8)) print "List elements with value 1 = "+str(values.count(1)) print "List elements with value 6 = "+str(values.count(6)) try: print "First list element with value 13 = "+str(values.index(13)) print "First list element with value 14 = "+str(values.index(14)) print "First list element with value 15 = "+str(values.index(15)) except: print "Oops - unable to find what we were looking for" # Now try search and remove (first occurrence of) a value print "Removing elements ..." values.remove(1) values.remove(35) print values # insert an element, append an element, append a series of elements print "Results of inserting and appending ..." values.insert(4,12) values.append(147) values.extend([238,475,703]); print values # replace a slice, delete by index, delete by slice print "Results of replacing and deleting ..." values[2:4] = [30,31,32,33,34,35] del values[5] del values[8:10] print values # now let's sort the list print "Results of sorting ..." values.sort() print values def evenfirst(one, two): if one%2 == 0 and two%2 != 0: return -1 if one%2 != 0 and two%2 == 0: return 1 return cmp(one, two) values.sort(evenfirst) print values Learn about this subject
This module and example are covered on the following public courses:
* Learning to program in Python * Python Programming * Intermediate Python Also available on on site courses for larger groups Books covering this topic
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This example comes from our "More on Collections and Sequences" training module. You'll find a description of the topic and some
other closely related examples on the "More on Collections and Sequences" module index page.
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