def __str__(self):
res = "<STR_LIT>"<EOL>keys = self.sequences.keys()<EOL>for i in range(<NUM_LIT:0>, len(keys)):<EOL><INDENT>if i != <NUM_LIT:0>:<EOL><INDENT>res += "<STR_LIT:\n>"<EOL><DEDENT>k = keys[i]<EOL>res += str(self.sequences[k])<EOL><DEDENT>return res<EOL>
:return: a string representation of the alignment.