<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def findPatternsInFile(codes, patternFinder):
 """ Find patterns of exceptions in a file. @param codes: code of the file to check @param patternFinder: a visitor for pattern checking and save results """

    tree = ast.parse(codes)
    patternFinder.visit(tree)