data['email'] if 'email' in data else None,
data['birthday'] if 'birthday' in data else None,
data['gender'] if 'gender' in data else None,
fields = ['email', 'birthday', 'gender']
for field in fields:
value = data.get(field)
print(value)
fields = ['email', 'birthday', 'gender']
existing_fields = {field: data.get(field) for field in fields if field in data}
print(existing_fields)