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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 bin_find(self):
 """Find installed packages """

        flag = []
        options = [
            "-f",
            "--find"
        ]
        additional_options = ["--case-ins"]
        for arg in self.args:
            if arg in additional_options:
                flag.append(arg)
                self.args.remove(arg)
        packages = self.args[1:]
        if len(self.args) > 1 and self.args[0] in options:
            PackageManager(packages).find(flag)
        else:
            usage("")