不太理解beidanci().add_command()具体是什么意思？引用吗？

class beidanci():
...
print("wrong command")

class beidanci():
def main_fc(self):
if command == 'add':

beidanci是类
beidanci()就是创建beidanci类的实例对象 通过实例对象来调用.add_command()
其实在类方法中可以直接用self.add_command()

class beidanci():
def main_fc(self):
if command == 'add':
beidanci().add_command()
elif command == 'del':
beidanci().del_command()
elif command == 'query':
beidanci().query_command()
else:
print("wrong command")
def add_command(self):
en, mean = word.split(':')
mydict[en] =mean

def del_command(self):
    del_mydict[word]

def query_command(self):    
    if word not in mydict:
            print('not found')
    else:
            print(mydict[word])

mydict = {}
n =int(input())
for i in range (n):
command,word = input().split(maxsplit=1)
beidanci().main_fc()