use python solve the task

You are given a set of strings separated with line feed characters. Find all the substrings that are correct assignment statements. The general formula for a valid assignment statement is " x=y; ", where x is the first operand, y is the second operand. Note that there may be several whitespace characters between the operands. In this task a string is considered to be a correct assignment statement when: 1) a variable is assigned to a constant value; 2) a variable is assigned to another variable; 3) a variable is assigned to an arithmetic expression; 4) a variable is assigned to an array element which index is either a numeric value, a variable or an arithmetic expression; 5) a variable is assigned to a function value. assignment statements (note that there is a semicolon at the ent of staten