[Tutor] Proper useage of "open"

[frank ernest]

I want to open a file so I read the library useage because I could not recall the propor useage.
 I typed in to my script:
 a = open (dupli, r)
 and got an error stating that "dupli" is not deffined.
 I started the script from within to same directorie that the file "dupli" was in. Perhaps it needs me to tell it to generate a list of files in the directorie?
 How do I get it to open the file "dupli"
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