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deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

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#/bin/sh
# USE ROOT RUN

# install gitlab runner
sudo wget -O /usr/local/bin/gitlab-runner https://gitlab-runner-downloads.s3.amazonaws.com/latest/binaries/gitlab-runner-linux-amd64
sudo chmod +x /usr/local/bin/gitlab-runner
sudo useradd --comment 'GitLab Runner' --create-home gitlab-runner --shell /bin/bash
gitlab-runner install --user=gitlab-runner --working-directory=/home/gitlab-runner
# add gitlab-runner to docker group
sudo gpasswd -a gitlab-runner docker

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#/bin/sh
# USE ROOT RUN

yum install -y perl gcc kernel-devel

# install

blkid
mkdir /mnt/cdrom
mount -t iso9660 /dev/cdrom /mnt/cdrom/

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#/bin/sh
# USE ROOT RUN

# install some tools
sudo yum install -y wget

# use aliyun
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

sudo yum install -y kernel-headers

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# coding : utf-8
# 接口隔离原则
# 也就是多继承
class LandAnimal(metaclass=ABCMeta):
    @abstractmethod
    def walk(self):
        pass

class SkyAnimal(metaclass=ABCMeta):
    @abstractmethod

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class queue:  
    def __init__(self, capacity = 10):  
        '''
        capacity 队列大小
        '''
        self.capacity = capacity  
        self.size = 0  
        self.front = 0  
        self.rear = 0  
        self.array = [0]*capacity  

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class Range:
    def __init__(self,stop,start=0):
        self.start=start
        self.stop=stop
    def __iter__(self):
        return self
    def __next__(self):
        if self.start > self.stop-1:
            raise StopIteration
        n=self.start