Matching packages distinguish between uppercase and
        lowercase

def case_insensitive(self):
        """Matching packages distinguish between uppercase and
        lowercase
        """
        if "--case-ins" in self.flag:
            data = []
            data = Utils().package_name(self.PACKAGES_TXT)
            data_dict = Utils().case_sensitive(data)
            for pkg in self.packages:
                index = self.packages.index(pkg)
                for key, value in data_dict.iteritems():
                    if key == pkg.lower():
                        self.packages[index] = value