ConfigParser is a package used to read configuration files. The format of the configuration file is as follows: the brackets "[]" contain sections. section below is the configuration similar to key value.

ConfigParser usage:

   [db]
   db_host = 127.0.0.1
   db_port = 69
   db_user = root
   db_pass = root
   host_port = 69
   
   [concurrent]
   thread = 10
   processor = 20
   

1. ConfigParser initialization object

     import configparser
     config = configparser.ConfigParser()
     config.read("ini", encoding="utf-8")
     r = config.options("db")
     print(r)
     #Operation result
     # ['db_host', 'db_port', 'db_user', 'db_pass', 'host_port']
   

2. Get the value of pointing option under pointing section

     import configparser
     config = configparser.ConfigParser()
     config.read("ini", encoding="utf-8")
     r = config.get("db", "db_host")
     # r1 = config.getint("db", "k1") #Convert get to value to int
     # r2 = config.getboolean("db", "k2" ) #Convert get to value to bool type
     # r3 = config.getfloat("db", "k3" ) #Convert get to value to floating point
     print(r)
     #Operation result
     # 127.0.0.1
   
   

3. Get the configuration information of the pointing section

   import configparser
   config = configparser.ConfigParser()
   config.read("ini", encoding="utf-8")
   r = config.items("db")
   print(r)
   #Operation result
   #[('db_host', '127.0.0.1'), ('db_port', '69'), ('db_user', 'root'), ('db_pass', 'root'), ('host_port', '69')]

4. Modify the value of an option. If it does not exist, it will create

   # Modify the value of an option. If the option does not exist, it will be created
   import configparser
   config = configparser.ConfigParser()
   config.read("ini", encoding="utf-8")
   config.set("db", "db_port", "69")  #Change the value of DB port to 69
   config.write(open("ini", "w"))

5. Check whether section or option exists, bool value

     import configparser
     config = configparser.ConfigParser()
     config.has_section("section") #Whether the section exists
     config.has_option("section", "option")  #Whether the option exists
   
   

6. Add section and option

     import configparser
     config = configparser.ConfigParser()
     config.read("ini", encoding="utf-8")
     if not config.has_section("default"):  # Check if section exists
         config.add_section("default")
     if not config.has_option("default", "db_host"):  # Check if the option exists
         config.set("default", "db_host", "1.1.1.1")
     config.write(open("ini", "w"))
     
    

7. Delete section and option

   import configparser
   config = configparser.ConfigParser()
   config.read("ini", encoding="utf-8")
   config.remove_section("default") #All content under the whole section will be deleted
   config.write(open("ini", "w"))

8. write file

   # The following lines of code only read the contents of the file into memory. After a series of operations, the file must be written back to take effect.
   import configparser
   config = configparser.ConfigParser()
   config.read("ini", encoding="utf-8")
   #Write back file
   config.write(open("ini", "w"))