In a Python program, why can't I cat a file right after writing it?

Question

I tried to cat a file, using Popen(), right after creating and writing to it. It doesn\'t work. Print p gives two empty tuples (\'\',\'\'). Why ? I\'ve used rename to ensure an

Answer 1

You did not call close. Use fd.close() (you forgot the parentheses there to make it an actual function call). This could have been prevented by using the with-statement:

with open("__q", "w") as fd:
    fd.write(t)
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