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s1={'hello':1,'u':2}
exec open('test.txt') in s1
result={‘hello’,’u’}
exec open(‘test.txt’) in result
selected = [] # temp list to hold matches
fp = open(‘test.txt’)
for line in fp.readlines(): # Py2.2 -> “for line in fp:”
selected.append(line)
del line # Cleanup transient variable
open(‘test.txt’).readlines()
result={‘hello’,’u’}
exec open(‘test.txt’) in result
s1={'hello':1,'u':2}
exec open('test.txt') in s1