Recently shared snippets for language "Python"

Created 1 year ago by anonymous
import math
E=3
T=40**E
D=10**E

def nu():
	for c in range(-T,T):
		yield c/D

def fu(n):
	r=n**n
	if isinstance(r,float):return r
	else:return ""

def va():
	for n in nu():
		yield fu(n)

def vb():
	for n in nu():
		yield fu(n+1/D)

def d(n):return int(n*D)

def inv(n):
	for a,b,r in zip(va(),vb(),nu()):
		if a=="" or b=="":continue
		if (d(a)<=d(n)<=d(b))or(d(b)<=d(n)<=d(a)):yield d(r)/D

while True:
	i=float(input())
	s=""
	for r in inv(i):
		if fu(r)==i:s+="="
		s+=str(r)
		s+="\n"
	print(s)
Created 2 years ago by anonymous
from flask import Flask, render_template, send_file, redirect
from PyPDF2 import PdfFileWriter, PdfFileReader
from os import makedirs
from os.path import isfile
from glob import glob
 
app = Flask(__name__)
 
def build_path(which, mod=None, page=None):
    return 'pdfs/{}{}{}'.format(which,
                                '.{}'.format(mod) if mod is not None else '',
                                '/{}.pdf'.format(page) if page is not None else '')
 
def get_saved_page(which):
    """Retrieve the last visited page of a pdf"""
    saved_path = build_path(which, 'saved')
    if not isfile(saved_path):
        set_saved_page(which, 0)
        return 0
    with open(saved_path, 'r') as f:
        return int(f.read())
 
def set_saved_page(which, page):
    """Set the last visited page of a pdf"""
    saved_path = build_path(which, 'saved')
    if not isfile(saved_path):
        open(saved_path, 'a').close()
    with open(saved_path, 'w') as f:
        f.write(str(page))
 
 
@app.route('/pdf/<which>/<page>')
def serve_pdf(which, page):
    """Serve a page of a pdf file"""
    return send_file(build_path(which, 'pages', page))
 
@app.route('/<which>')
@app.route('/<which>/<page>')
def pdf(which, page=None):
    """Create a page of a pdf and display it"""
    if page is None:
        page = get_saved_page(which)
    if page == 'all':
        return send_file(build_path(which))
    page = int(page)
    pdf_path = build_path(which)
    page_directory = build_path(which, 'pages')
    page_path = build_path(which, 'pages', page)
    if page < 0:
        return redirect('{}/{}'.format(which, 0))
    if not isfile(page_path):
        makedirs(page_directory, exist_ok=True)
        pdfout = PdfFileWriter()
        with open(pdf_path, 'rb') as fin:
            pdfin = PdfFileReader(fin)
            if pdfin.isEncrypted:
                pdfin.decrypt('')
            pdfout.addPage(pdfin.getPage(page))
            with open(page_path, 'wb') as fout:
                pdfout.write(fout)
    set_saved_page(which, page)
    return render_template('index.html', which=which, page=page)
 
@app.route('/')
def contents():
    """List all available pdfs"""
    contents = list(map(lambda x: {'href': x.split('/')[1], 'name': ' '.join(x.split('/')[1].split('.')[0:-1])}, glob('pdfs/*.pdf')))
    return render_template('contents.html', contents=contents)
 
if __name__ == '__main__':
    app.run()
Created 2 years ago by anonymous
#!/usr/bin/env python
"""
Converted from ElastiCache_Redis.template located at:
http://aws.amazon.com/cloudformation/aws-cloudformation-templates/
 
In addition to troposphere, this script requires awacs (Amazon Web Access
Control Subsystem)
"""
from __future__ import absolute_import, division, print_function
 
import troposphere.ec2 as ec2
import troposphere.elasticache as elasticache
import troposphere.iam as iam
 
from awacs.aws import (Allow,
                       Statement,
                       Principal,
                       Policy)
from awacs.sts import AssumeRole
 
from troposphere import (Base64,
                         cloudformation,
                         FindInMap,
                         GetAtt,
                         Join,
                         Parameter,
                         Output,
                         Ref,
                         Tags,
                         Template)
from troposphere.policies import (CreationPolicy,
                                  ResourceSignal)
 
 
def main():
    """
    Create a ElastiCache Redis Node and EC2 Instance
    """
 
    template = Template()
 
    # Description
    template.add_description(
        'AWS CloudFormation Sample Template ElastiCache_Redis:'
        'Sample template showIing how to create an Amazon'
        'ElastiCache Redis Cluster. **WARNING** This template'
        'creates an Amazon EC2 Instance and an Amazon ElastiCache'
        'Cluster. You will be billed for the AWS resources used'
        'if you create a stack from this template.')
 
    # Mappings
    template.add_mapping('AWSInstanceType2Arch', {
        't1.micro':     {'Arch': 'PV64'},
        't2.micro':     {'Arch': 'HVM64'},
        't2.small':     {'Arch': 'HVM64'},
        't2.medium':    {'Arch': 'HVM64'},
        'm1.small':     {'Arch': 'PV64'},
        'm1.medium':    {'Arch': 'PV64'},
        'm1.large':     {'Arch': 'PV64'},
        'm1.xlarge':    {'Arch': 'PV64'},
        'm2.xlarge':    {'Arch': 'PV64'},
        'm2.2xlarge':   {'Arch': 'PV64'},
        'm2.4xlarge':   {'Arch': 'PV64'},
        'm3.medium':    {'Arch': 'HVM64'},
        'm3.large':     {'Arch': 'HVM64'},
        'm3.xlarge':    {'Arch': 'HVM64'},
        'm3.2xlarge':   {'Arch': 'HVM64'},
        'c1.medium':    {'Arch': 'PV64'},
        'c1.xlarge':    {'Arch': 'PV64'},
        'c3.large':     {'Arch': 'HVM64'},
        'c3.xlarge':    {'Arch': 'HVM64'},
        'c3.2xlarge':   {'Arch': 'HVM64'},
        'c3.4xlarge':   {'Arch': 'HVM64'},
        'c3.8xlarge':   {'Arch': 'HVM64'},
        'c4.large':     {'Arch': 'HVM64'},
        'c4.xlarge':    {'Arch': 'HVM64'},
        'c4.2xlarge':   {'Arch': 'HVM64'},
        'c4.4xlarge':   {'Arch': 'HVM64'},
        'c4.8xlarge':   {'Arch': 'HVM64'},
        'g2.2xlarge':   {'Arch': 'HVMG2'},
        'r3.large':     {'Arch': 'HVM64'},
        'r3.xlarge':    {'Arch': 'HVM64'},
        'r3.2xlarge':   {'Arch': 'HVM64'},
        'r3.4xlarge':   {'Arch': 'HVM64'},
        'r3.8xlarge':   {'Arch': 'HVM64'},
        'i2.xlarge':    {'Arch': 'HVM64'},
        'i2.2xlarge':   {'Arch': 'HVM64'},
        'i2.4xlarge':   {'Arch': 'HVM64'},
        'i2.8xlarge':   {'Arch': 'HVM64'},
        'd2.xlarge':    {'Arch': 'HVM64'},
        'd2.2xlarge':   {'Arch': 'HVM64'},
        'd2.4xlarge':   {'Arch': 'HVM64'},
        'd2.8xlarge':   {'Arch': 'HVM64'},
        'hi1.4xlarge':  {'Arch': 'HVM64'},
        'hs1.8xlarge':  {'Arch': 'HVM64'},
        'cr1.8xlarge':  {'Arch': 'HVM64'},
        'cc2.8xlarge':  {'Arch': 'HVM64'}
        })
 
    template.add_mapping('AWSRegionArch2AMI', {
        'us-east-1': {'PV64': 'ami-0f4cfd64',
                      'HVM64': 'ami-0d4cfd66',
                      'HVMG2': 'ami-5b05ba30'},
        'us-west-2': {'PV64': 'ami-d3c5d1e3',
                      'HVM64': 'ami-d5c5d1e5',
                      'HVMG2': 'ami-a9d6c099'},
        'us-west-1': {'PV64': 'ami-85ea13c1',
                      'HVM64': 'ami-87ea13c3',
                      'HVMG2': 'ami-37827a73'},
        'eu-west-1': {'PV64': 'ami-d6d18ea1',
                      'HVM64': 'ami-e4d18e93',
                      'HVMG2': 'ami-72a9f105'},
        'eu-central-1': {'PV64': 'ami-a4b0b7b9',
                         'HVM64': 'ami-a6b0b7bb',
                         'HVMG2': 'ami-a6c9cfbb'},
        'ap-northeast-1': {'PV64': 'ami-1a1b9f1a',
                           'HVM64': 'ami-1c1b9f1c',
                           'HVMG2': 'ami-f644c4f6'},
        'ap-southeast-1': {'PV64': 'ami-d24b4280',
                           'HVM64': 'ami-d44b4286',
                           'HVMG2': 'ami-12b5bc40'},
        'ap-southeast-2': {'PV64': 'ami-ef7b39d5',
                           'HVM64': 'ami-db7b39e1',
                           'HVMG2': 'ami-b3337e89'},
        'sa-east-1': {'PV64': 'ami-5b098146',
                      'HVM64': 'ami-55098148',
                      'HVMG2': 'NOT_SUPPORTED'},
        'cn-north-1': {'PV64': 'ami-bec45887',
                       'HVM64': 'ami-bcc45885',
                       'HVMG2': 'NOT_SUPPORTED'}
        })
 
    template.add_mapping('Region2Principal', {
        'us-east-1': {'EC2Principal': 'ec2.amazonaws.com',
                      'OpsWorksPrincipal': 'opsworks.amazonaws.com'},
        'us-west-2': {'EC2Principal': 'ec2.amazonaws.com',
                      'OpsWorksPrincipal': 'opsworks.amazonaws.com'},
        'us-west-1': {'EC2Principal': 'ec2.amazonaws.com',
                      'OpsWorksPrincipal': 'opsworks.amazonaws.com'},
        'eu-west-1': {'EC2Principal': 'ec2.amazonaws.com',
                      'OpsWorksPrincipal': 'opsworks.amazonaws.com'},
        'ap-southeast-1': {'EC2Principal': 'ec2.amazonaws.com',
                           'OpsWorksPrincipal': 'opsworks.amazonaws.com'},
        'ap-northeast-1': {'EC2Principal': 'ec2.amazonaws.com',
                           'OpsWorksPrincipal': 'opsworks.amazonaws.com'},
        'ap-southeast-2': {'EC2Principal': 'ec2.amazonaws.com',
                           'OpsWorksPrincipal': 'opsworks.amazonaws.com'},
        'sa-east-1': {'EC2Principal': 'ec2.amazonaws.com',
                      'OpsWorksPrincipal': 'opsworks.amazonaws.com'},
        'cn-north-1': {'EC2Principal': 'ec2.amazonaws.com.cn',
                       'OpsWorksPrincipal': 'opsworks.amazonaws.com.cn'},
        'eu-central-1': {'EC2Principal': 'ec2.amazonaws.com',
                         'OpsWorksPrincipal': 'opsworks.amazonaws.com'}
        })
 
    # Parameters
    cachenodetype = template.add_parameter(Parameter(
        'ClusterNodeType',
        Description='The compute and memory capacity of the nodes in the Redis'
                    ' Cluster',
        Type='String',
        Default='cache.m1.small',
        AllowedValues=['cache.m1.small',
                       'cache.m1.large',
                       'cache.m1.xlarge',
                       'cache.m2.xlarge',
                       'cache.m2.2xlarge',
                       'cache.m2.4xlarge',
                       'cache.c1.xlarge'],
        ConstraintDescription='must select a valid Cache Node type.',
        ))
 
    instancetype = template.add_parameter(Parameter(
        'InstanceType',
        Description='WebServer EC2 instance type',
        Type='String',
        Default='t2.micro',
        AllowedValues=['t1.micro',
                       't2.micro',
                       't2.small',
                       't2.medium',
                       'm1.small',
                       'm1.medium',
                       'm1.large',
                       'm1.xlarge',
                       'm2.xlarge',
                       'm2.2xlarge',
                       'm2.4xlarge',
                       'm3.medium',
                       'm3.large',
                       'm3.xlarge',
                       'm3.2xlarge',
                       'c1.medium',
                       'c1.xlarge',
                       'c3.large',
                       'c3.xlarge',
                       'c3.2xlarge',
                       'c3.4xlarge',
                       'c3.8xlarge',
                       'c4.large',
                       'c4.xlarge',
                       'c4.2xlarge',
                       'c4.4xlarge',
                       'c4.8xlarge',
                       'g2.2xlarge',
                       'r3.large',
                       'r3.xlarge',
                       'r3.2xlarge',
                       'r3.4xlarge',
                       'r3.8xlarge',
                       'i2.xlarge',
                       'i2.2xlarge',
                       'i2.4xlarge',
                       'i2.8xlarge',
                       'd2.xlarge',
                       'd2.2xlarge',
                       'd2.4xlarge',
                       'd2.8xlarge',
                       'hi1.4xlarge',
                       'hs1.8xlarge',
                       'cr1.8xlarge',
                       'cc2.8xlarge',
                       'cg1.4xlarge'],
        ConstraintDescription='must be a valid EC2 instance type.',
        ))
 
    keyname = template.add_parameter(Parameter(
        'KeyName',
        Description='Name of an existing EC2 KeyPair to enable SSH access'
                    ' to the instance',
        Type='AWS::EC2::KeyPair::KeyName',
        ConstraintDescription='must be the name of an existing EC2 KeyPair.',
        ))
 
    sshlocation = template.add_parameter(Parameter(
        'SSHLocation',
        Description='The IP address range that can be used to SSH to'
                    ' the EC2 instances',
        Type='String',
        MinLength='9',
        MaxLength='18',
        Default='0.0.0.0/0',
        AllowedPattern='(\\d{1,3})\\.(\\d{1,3})\\.'
                       '(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})',
        ConstraintDescription='must be a valid IP CIDR range of the'
                              ' form x.x.x.x/x.'
        ))
 
    # Resources
    webserverrole = template.add_resource(iam.Role(
        'WebServerRole',
        AssumeRolePolicyDocument=Policy(
            Statement=[
                Statement(
                    Effect=Allow,
                    Action=[AssumeRole],
                    Principal=Principal('Service',
                                        [FindInMap('Region2Principal',
                                                   Ref('AWS::Region'),
                                                   'EC2Principal')]),
                    )
                ]
            ),
        Path='/',
        ))
 
    template.add_resource(iam.PolicyType(
        'WebServerRolePolicy',
        PolicyName='WebServerRole',
        # PolicyDocument=Policy(
        #     Statement=[
        #         Statement(
        #             Effect=Allow,
        #             Action=['elasticache:DescribeCacheClusters'],
        #             Resource=['*'],
        #             )
        #         ]
        #     )
        # The following can probably be fixed to use #
        # awacs (above didn't work)                  #
        PolicyDocument={
            "Statement":    [{
                "Effect":   "Allow",
                "Action":   "elasticache:DescribeCacheClusters",
                "Resource": "*"
                }]
            },
        Roles=[Ref(webserverrole)],
        ))
 
    webserverinstanceprofile = template.add_resource(iam.InstanceProfile(
        'WebServerInstanceProfile',
        Path='/',
        Roles=[Ref(webserverrole)],
    ))
 
    webserversg = template.add_resource(ec2.SecurityGroup(
        'WebServerSecurityGroup',
        GroupDescription='Enable HTTP and SSH access',
        SecurityGroupIngress=[
            ec2.SecurityGroupRule(
                IpProtocol='tcp',
                FromPort='22',
                ToPort='22',
                CidrIp=Ref(sshlocation),
                ),
            ec2.SecurityGroupRule(
                IpProtocol='tcp',
                FromPort='80',
                ToPort='80',
                CidrIp='0.0.0.0/0',
                )
            ]
        ))
 
    webserverinstance = template.add_resource(ec2.Instance(
        'WebServerInstance',
        Metadata=cloudformation.Metadata(
            cloudformation.Init({
                'config': cloudformation.InitConfig(
                    packages={
                        'yum': {
                            'httpd':     [],
                            'php':       [],
                            'php-devel': [],
                            'gcc':       [],
                            'make':      []
                            }
                        },
 
                    files=cloudformation.InitFiles({
                        '/var/www/html/index.php': cloudformation.InitFile(
                            content=Join('', [
                                '<?php\n',
                                'echo \"<h1>AWS CloudFormation sample'
                                ' application for Amazon ElastiCache'
                                ' Redis Cluster</h1>\";\n',
                                '\n',
                                '$cluster_config = json_decode('
                                'file_get_contents(\'/tmp/cacheclusterconfig\''
                                '), true);\n',
                                '$endpoint = $cluster_config[\'CacheClusters'
                                '\'][0][\'CacheNodes\'][0][\'Endpoint\'][\'Add'
                                'ress\'];\n',
                                '$port = $cluster_config[\'CacheClusters\'][0]'
                                '[\'CacheNodes\'][0][\'Endpoint\'][\'Port\'];'
                                '\n',
                                '\n',
                                'echo \"<p>Connecting to Redis Cache Cluster '
                                'node \'{$endpoint}\' on port {$port}</p>\";'
                                '\n',
                                '\n',
                                '$redis=new Redis();\n',
                                '$redis->connect($endpoint, $port);\n',
                                '$redis->set(\'testkey\', \'Hello World!\');'
                                '\n',
                                '$return = $redis->get(\'testkey\');\n',
                                '\n',
                                'echo \"<p>Retrieved value: $return</p>\";'
                                '\n',
                                '?>\n'
                                ]),
                            mode='000644',
                            owner='apache',
                            group='apache'
                            ),
                        '/etc/cron.d/get_cluster_config':
                            cloudformation.InitFile(
                                content='*/5 * * * * root'
                                        ' /usr/local/bin/get_cluster_config',
                                mode='000644',
                                owner='root',
                                group='root'
                                ),
                        '/usr/local/bin/get_cluster_config':
                            cloudformation.InitFile(
                                content=Join('', [
                                    '#! /bin/bash\n',
                                    'aws elasticache describe-cache-clusters ',
                                    '         --cache-cluster-id ',
                                    Ref('RedisCluster'),
                                    '         --show-cache-node-info'
                                    ' --region ', Ref('AWS::Region'),
                                    ' > /tmp/cacheclusterconfig\n'
                                    ]),
                                mode='000755',
                                owner='root',
                                group='root'
                                ),
                        '/usr/local/bin/install_phpredis':
                            cloudformation.InitFile(
                                content=Join('', [
                                    '#! /bin/bash\n',
                                    'cd /tmp\n',
                                    'wget https://github.com/nicolasff/'
                                    'phpredis/zipball/master -O phpredis.zip'
                                    '\n',
                                    'unzip phpredis.zip\n',
                                    'cd nicolasff-phpredis-*\n',
                                    'phpize\n',
                                    './configure\n',
                                    'make && make install\n',
                                    'touch /etc/php.d/redis.ini\n',
                                    'echo extension=redis.so > /etc/php.d/'
                                    'redis.ini\n'
                                    ]),
                                mode='000755',
                                owner='root',
                                group='root'
                                ),
                        '/etc/cfn/cfn-hup.conf': cloudformation.InitFile(
                            content=Join('', [
                                '[main]\n',
                                'stack=', Ref('AWS::StackId'), '\n',
                                'region=', Ref('AWS::Region'), '\n'
                                ]),
                            mode='000400',
                            owner='root',
                            group='root'
                            ),
                        '/etc/cfn/hooks.d/cfn-auto-reloader.conf':
                            cloudformation.InitFile(
                                content=Join('', [
                                    '[cfn-auto-reloader-hook]\n',
                                    'triggers=post.update\n',
                                    'path=Resources.WebServerInstance.Metadata'
                                    '.AWS::CloudFormation::Init\n',
                                    'action=/opt/aws/bin/cfn-init -v ',
                                    '         --stack ', Ref('AWS::StackName'),
                                    '         --resource WebServerInstance ',
                                    '         --region ', Ref('AWS::Region'),
                                    '\n',
                                    'runas=root\n'
                                    ]),
                                # Why doesn't the Amazon template have this?
                                # mode='000400',
                                # owner='root',
                                # group='root'
                                ),
                        }),
 
                    commands={
                        '01-install_phpredis': {
                            'command': '/usr/local/bin/install_phpredis'
                            },
                        '02-get-cluster-config': {
                            'command': '/usr/local/bin/get_cluster_config'
                            }
                        },
 
                    services={
                        "sysvinit": cloudformation.InitServices({
                            "httpd": cloudformation.InitService(
                                enabled=True,
                                ensureRunning=True,
                                ),
                            "cfn-hup": cloudformation.InitService(
                                enabled=True,
                                ensureRunning=True,
                                files=['/etc/cfn/cfn-hup.conf',
                                       '/etc/cfn/hooks.d/'
                                       'cfn-auto-reloader.conf']
                                ),
                            }),
                        },
                    )
                })
            ),
        ImageId=FindInMap('AWSRegionArch2AMI', Ref('AWS::Region'),
                          FindInMap('AWSInstanceType2Arch',
                                    Ref(instancetype), 'Arch')),
        InstanceType=Ref(instancetype),
        SecurityGroups=[Ref(webserversg)],
        KeyName=Ref(keyname),
        IamInstanceProfile=Ref(webserverinstanceprofile),
        UserData=Base64(Join('', [
            '#!/bin/bash -xe\n',
            'yum update -y aws-cfn-bootstrap\n',
 
            '# Setup the PHP sample application\n',
            '/opt/aws/bin/cfn-init -v ',
            '         --stack ', Ref('AWS::StackName'),
            '         --resource WebServerInstance ',
            '         --region ', Ref('AWS::Region'), '\n',
 
            '# Signal the status of cfn-init\n',
            '/opt/aws/bin/cfn-signal -e $? ',
            '         --stack ', Ref('AWS::StackName'),
            '         --resource WebServerInstance ',
            '         --region ', Ref('AWS::Region'), '\n'
            ])),
        CreationPolicy=CreationPolicy(
            ResourceSignal=ResourceSignal(Timeout='PT15M')
            ),
        Tags=Tags(Application=Ref('AWS::StackId'),
                  Details='Created using Troposhpere')
        ))
 
    redisclustersg = template.add_resource(elasticache.SecurityGroup(
        'RedisClusterSecurityGroup',
        Description='Lock the cluster down',
        ))
 
    template.add_resource(elasticache.SecurityGroupIngress(
        'RedisClusterSecurityGroupIngress',
        CacheSecurityGroupName=Ref(redisclustersg),
        EC2SecurityGroupName=Ref(webserversg),
        ))
 
    template.add_resource(elasticache.CacheCluster(
        'RedisCluster',
        Engine='redis',
        CacheNodeType=Ref(cachenodetype),
        NumCacheNodes='1',
        CacheSecurityGroupNames=[Ref(redisclustersg)],
        ))
 
    # Outputs
    template.add_output([
        Output(
            'WebsiteURL',
            Description='Application URL',
            Value=Join('', [
                'http://',
                GetAtt(webserverinstance, 'PublicDnsName'),
 
                ])
            )
        ])
 
    # Print CloudFormation Template
    print(template.to_json())
 
 
if __name__ == '__main__':
    main()
^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$