IT Lab

다음 코드를 사용하면 된다.

def getType(x):

    return {

        0: 'A',

        1: 'B',

        2: 'C'

    }[x]

>>> getType(0)

'A'

ec2에서 sudo pip install이 안되는 경우가 있다.

[ec2-user@ip-172-31-17-194 ~]$ sudo pip install boto3
Traceback (most recent call last):
  File "/usr/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3138, in <module>
    @_call_aside
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3124, in _call_aside
    f(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3151, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 663, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 676, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 849, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==6.1.1' distribution was not found and is required by the application
[ec2-user@ip-172-31-17-194 ~]$ which pip
/usr/local/bin/pip

우와 같이 나오는 경우 경로를 다음과 같이 경로를 수정하면 된다. 

sudo /usr/local/bin/pip

ADHOC-JOB으로 시작하는 클러스터 아이디를 뽑아내고 싶다면 쉘에서 다음과 같이 입력하면 클러스터 아이디를 추출할 수 있다.

CLUSTER_ID=`aws emr list-clusters --active --query 'Clusters[?starts_with(Name, \`ADHOC-JOB\`) == \`true\`].Id' | jq .[] | sed -e 's/^"//' -e 's/"$//'`