Pseudocode writes out code in a form that is similar to code, but not exactly code. So, to open the file and print, print its lines of text
if file exists(path_to_file) then :
open (path_to_file)
for each line in file : print the line of the file
All you have to do is create a sequence of steps necessary for your problem and write it like this. Since you mention python, just use in your pseudo-code more syntax like python.
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