Write a program to create a function that accepts a string, checks if it's a valid email address and returns either True or False, depending on the evaluation. (i) The string must contain an @ character. (ii) The string must contain a . character. (iii) The @ must have at least one character in front of it. (iv) The . and the @ must be in the appropriate places. If the string passes these tests, it's considered a valid email address. Also write an algorithm. (python)

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