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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def from_string(string):
 """ Reads a string representation to a Cssr object. Args: string (str):
 A string representation of a CSSR. Returns: Cssr object. """

        lines = string.split("\n")
        toks = lines[0].split()
        lengths = [float(i) for i in toks]
        toks = lines[1].split()
        angles = [float(i) for i in toks[0:3]]
        latt = Lattice.from_lengths_and_angles(lengths, angles)
        sp = []
        coords = []
        for l in lines[4:]:
            m = re.match(
                r"\d+\s+(\w+)\s+([0-9\-\.]+)\s+([0-9\-\.]+)\s+([0-9\-\.]+)",
                l.strip())
            if m:
                sp.append(m.group(1))
                coords.append([float(m.group(i)) for i in range(2, 5)])
        return Cssr(Structure(latt, sp, coords))