Python - Convert file content to uppercase


The following code reads a file line by line, printing the uppercase version of each line, without ever explicitly reading from the file at all:


for line in open(''):       # Use file iterators to read by lines 
    print(line.upper(), end='')       # Calls __next__, catches StopIteration


The print uses end='' here to suppress adding a \n, because line strings already have one.

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