How to use the sendgrid.helpers.mail.personalization.Personalization function in sendgrid

def add_substitution(self, substitution):
        """Add a substitution to the email

        :param value: Add a substitution to the email
        :type value: Substitution
        """
        if substitution.personalization:
            try:
                personalization = \
                    self._personalizations[substitution.personalization]
                has_internal_personalization = True
            except IndexError:
                personalization = Personalization()
                has_internal_personalization = False
            personalization.add_substitution(substitution)

            if not has_internal_personalization:
                self.add_personalization(
                    personalization, index=substitution.personalization)
        else:
            if isinstance(substitution, list):
                for s in substitution:
                    for p in self.personalizations:
                        p.add_substitution(s)
            else:
                for p in self.personalizations:
                    p.add_substitution(substitution)

def dynamic_template_data(self, value):
        """Data for a transactional template

        :param value: Data for a transactional template
        :type value: DynamicTemplateData, a JSON-serializeable structure
        """
        if not isinstance(value, DynamicTemplateData):
            value = DynamicTemplateData(value)
        try:
            personalization = self._personalizations[value.personalization]
            has_internal_personalization = True
        except IndexError:
            personalization = Personalization()
            has_internal_personalization = False
        personalization.dynamic_template_data = value.dynamic_template_data

        if not has_internal_personalization:
            self.add_personalization(
                personalization, index=value.personalization)

:param emails: An Email or list of Email objects
        :type emails: Email, list(Email)
        :param global_substitutions: A dict of substitutions for all recipients
        :type global_substitutions: dict
        :param is_multiple: Create a new personilization for each recipient
        :type is_multiple: bool
        :param p: p is the Personalization object or Personalization object
                  index
        :type p: Personalization, integer, optional
        """
        # Send multiple emails to multiple recipients
        if is_multiple is True:
            if isinstance(emails, list):
                for email in emails:
                    personalization = Personalization()
                    personalization.add_email(email)
                    self.add_personalization(personalization)
            else:
                personalization = Personalization()
                personalization.add_email(emails)
                self.add_personalization(personalization)
            if global_substitutions is not None:
                if isinstance(global_substitutions, list):
                    for substitution in global_substitutions:
                        for p in self.personalizations:
                            p.add_substitution(substitution)
                else:
                    for p in self.personalizations:
                        p.add_substitution(global_substitutions)
        else:
            try:

def add_header(self, header):
        """Add headers to the email globaly or to a specific Personalization

        :param value: A Header object or a dict of header key/values
        :type value: Header, dict
        """
        if header.personalization is not None:
            try:
                personalization = \
                    self._personalizations[header.personalization]
                has_internal_personalization = True
            except IndexError:
                personalization = Personalization()
                has_internal_personalization = False
            if isinstance(header, dict):
                (k, v) = list(header.items())[0]
                personalization.add_header(Header(k, v))
            else:
                personalization.add_header(header)

            if not has_internal_personalization:
                self.add_personalization(
                    personalization,
                    index=header.personalization)
        else:
            if isinstance(header, dict):
                (k, v) = list(header.items())[0]
                self._headers = self._ensure_append(
                                    Header(k, v), self._headers)

personalization.add_email(emails)
                self.add_personalization(personalization)
            if global_substitutions is not None:
                if isinstance(global_substitutions, list):
                    for substitution in global_substitutions:
                        for p in self.personalizations:
                            p.add_substitution(substitution)
                else:
                    for p in self.personalizations:
                        p.add_substitution(global_substitutions)
        else:
            try:
                personalization = self._personalizations[p]
                has_internal_personalization = True
            except IndexError:
                personalization = Personalization()
                has_internal_personalization = False

            if isinstance(emails, list):
                for email in emails:
                    personalization.add_email(email)
            else:
                personalization.add_email(emails)

            if global_substitutions is not None:
                if isinstance(global_substitutions, list):
                    for substitution in global_substitutions:
                        personalization.add_substitution(substitution)
                else:
                    personalization.add_substitution(global_substitutions)

            if not has_internal_personalization:

:type global_substitutions: dict
        :param is_multiple: Create a new personilization for each recipient
        :type is_multiple: bool
        :param p: p is the Personalization object or Personalization object
                  index
        :type p: Personalization, integer, optional
        """
        # Send multiple emails to multiple recipients
        if is_multiple is True:
            if isinstance(emails, list):
                for email in emails:
                    personalization = Personalization()
                    personalization.add_email(email)
                    self.add_personalization(personalization)
            else:
                personalization = Personalization()
                personalization.add_email(emails)
                self.add_personalization(personalization)
            if global_substitutions is not None:
                if isinstance(global_substitutions, list):
                    for substitution in global_substitutions:
                        for p in self.personalizations:
                            p.add_substitution(substitution)
                else:
                    for p in self.personalizations:
                        p.add_substitution(global_substitutions)
        else:
            try:
                personalization = self._personalizations[p]
                has_internal_personalization = True
            except IndexError:
                personalization = Personalization()

def subject(self, value):
        """The subject of the email(s)

        :param value: The subject of the email(s)
        :type value: Subject, string
        """
        if isinstance(value, Subject):
            if value.personalization is not None:
                try:
                    personalization = \
                        self._personalizations[value.personalization]
                    has_internal_personalization = True
                except IndexError:
                    personalization = Personalization()
                    has_internal_personalization = False
                personalization.subject = value.subject

                if not has_internal_personalization:
                    self.add_personalization(
                        personalization,
                        index=value.personalization)
            else:
                self._subject = value
        else:
            self._subject = Subject(value)

def add_custom_arg(self, custom_arg):
        """Add custom args to the email globaly or to a specific Personalization

        :param value: A CustomArg object or a dict of custom arg key/values
        :type value: CustomArg, dict
        """
        if custom_arg.personalization is not None:
            try:
                personalization = \
                    self._personalizations[custom_arg.personalization]
                has_internal_personalization = True
            except IndexError:
                personalization = Personalization()
                has_internal_personalization = False
            if isinstance(custom_arg, dict):
                (k, v) = list(custom_arg.items())[0]
                personalization.add_custom_arg(CustomArg(k, v))
            else:
                personalization.add_custom_arg(custom_arg)

            if not has_internal_personalization:
                self.add_personalization(
                    personalization, index=custom_arg.personalization)
        else:
            if isinstance(custom_arg, dict):
                (k, v) = list(custom_arg.items())[0]
                self._custom_args = self._ensure_append(
                    CustomArg(k, v), self._custom_args)
            else: