from odoo import models, fields


class patient_information(models.Model):
    _name = "hospital.patient"
    _description = "patient_information_Table"

    name = fields.char(String="Patient_Name")
    age = fields.char(string="Patient_age")
    gender = fields.selection([('male', 'Male'), ('female', 'Female')], string="Gender")

i write the above code when i hove on char it pop up in pycharm that char function not in fields class.Also when i save and restart the service it give me an error of 500. 
i need your kind suggestions regarding this issue. Thanks in advance.