thecraftman

Parameters:
  NameOfService:
    Description: "The name of the service this stack is to be used for."
    Type: String
  KeyName:
    Description: "Name of existing EC2 KeyPar to enable SSH access into the server"
    Type: AWS::EC2::KeyPair::KeyName
Outputs:
  WebsiteURL:
    Description: Website URL for EC2 Instance

thecraftman

Properties:
      InstanceType: t2.micro
      SecurityGroups:
        - !Ref EC2SecurityGroup
  EC2SecurityGroup:
    Type: AWS::EC2::SecurityGroup 
    Properties:
      GroupDescription: "Enable HTTP on 80"
      SecurityGroupIngress:
        - IpProtocol: tcp

thecraftman

Fn::Equals
  # Returns true if two values are equal else it will return false. 
  - Syntax: Fn:Equals: [value_1, value_2]
  - short syntax: !Equals[value_1, value_2]
 Example: 
 UserProdCondition:
  !Equals [!Ref EnvironmentType, prod]

thecraftman

Fn::And
  - Fn:::And acts as an AND operator 
  - Minimum number of a condition is 2 
  - Maximum number of a condition is 10
  - syntax: Fn:And: [condtion]

thecraftman

# list comprehension 

my_nums = (x*x for x in [1, 2, 3, 4, 5])

print my_nums

for num in my_nums:
  print num

thecraftman

# list comprehension 

my_nums = [x*x for x in [1, 2, 3, 4, 5]]

print my_nums

for num in my_nums:
  print num

thecraftman

def square_numbers(nums):
  for i in nums: 
    yield(i*i)
    
my_nums = square_numbers([1, 2, 3, 4, 5])

for num in my_nums:
  print num

thecraftman

def square_numbers(nums):
  for i in nums: 
    yield(i*i)
    
my_nums = square_numbers([1, 2, 3, 4, 5])

print next(my_nums)
print next(my_nums)
print next(my_nums)
print next(my_nums)

thecraftman

def square_numbers(nums):
  for i in nums: 
    yield(i*i)
    
my_nums = square_numbers([1, 2, 3, 4, 5])

print next(my_nums)

thecraftman

def square_numbers(nums):
  for i in nums: 
    yield(i*i)
    
my_nums = square_numbers([1, 2, 3, 4, 5])

print my_nums