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Counting the number of times something occurs
Programming Algorithms example from a Well House Consultants training course
More on Programming Algorithms [link]
Source code: lif.py Module: Q110
""" Counting the number of times something occurs Method: 1. Set counter to zero 2. Loop through data, adding 1 each time you find a match 3. When you have looped through all your data, you have a complete count """ # Open a file ... return a "file handle" fh = open("ac_20101205") # Read each line of the file and pass it back # via the "record" variable lines_so_far = 0 matches_so_far = 0 for record in fh.readlines(): # Count all lines lines_so_far += 1 if record.find("Melksham") > 0: # Count lines that match matches_so_far += 1 print record # Print out the totals - could copy "so_far" # variables to other better names, but I am # not going to bother ;-) print "Total lines:",lines_so_far print "Total matches:",matches_so_far Learn about this subject
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Other Examples
This example comes from our "Programming Algorithms" training module. You'll find a description of the topic and some
other closely related examples on the "Programming Algorithms" module index page.
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