Suppose I want to find something, that is present multiple times in a large (several hundred megabyte) file. However, I only want it if something else exists after it but before the next occurrence of the thing I am looking for. For instance the thing I am looking for might be a set of code numbers and the condition that I will use to decide whether I want the code may be 1 or more lines further into the file but before the next occurrence of a code number. What is the best (most elegant) way to approach this problem? Chet

In reply to parsing large files for something by cseligman

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