Python TypeError: must be str, not int for a String

Question

I'm working on a Python(3.6) project in which I need to append an integer value to a multiline string.

Here's My code:

    for var in list(range(1, no_of_svc + 1)):
        svar = str(var)
        print(type(svar))
        port = type(data['configuration']['svc' + svar]['port']['port'])
        print(port)
        port = str(data['configuration']['svc' + svar]['port']['port'])
        deployments = deployment + '''\n
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: ''' + data['deployment_name'] + '''-''' + data['configuration']['svc' + str(var)]['name'] + '''
  labels:
    #Project ID
    app: ''' + data['configuration']['svc' + str(var)]['name'] + '''
spec:
  #Run two instances of our application
  replicas: ''' + data['configuration']['svc' + str(var)]['replicas'] + '''
  template:
    metadata:
      labels:
        app: ''' + data['configuration']['svc' + str(var)]['name'] + '''
    spec:
      #Container details
      containers:
        - name: ''' + data['configuration']['svc' + str(var)]['versions']['v1']['name'] + '''
          image: ''' + data['configuration']['svc' + str(var)]['versions']['v1']['image'] + '''
          imagePullPolicy: Always
          #Ports to expose
          ports:
          - containerPort: ''' + port + '''        
'''

As you can see in the code above I have converted port to string and even the output of print(type(svar)) and print(port) is <class 'str'> but still it's not working.

Here's the error message:

   - containerPort: ''' + port + '''
 TypeError: must be str, not int

I have turned it by using the format method and it's working:

    no_of_svc = int(data['configuration']['no_of_svc'])
    deployment = ''
    deployments = ''''''
    for var in list(range(1, no_of_svc + 1)):
        deployments = deployment + '''\n
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: {}
  labels:
    #Project ID
    app: {}
spec:
  #Run two instances of our application
  replicas: {}
  template:
    metadata:
      labels:
        app: {}
    spec:
      #Container details
      containers:
        - name: {}
          image: {}
          imagePullPolicy: Always
          #Ports to expose
          ports:
          - containerPort: {}        
'''.format(data['deployment_name'] + '-' + data['configuration']['svc' + str(var)]['name'],
           data['configuration']['svc' + str(var)]['name'],
           data['configuration']['svc' + str(var)]['replicas'],
           data['configuration']['svc' + str(var)]['name'],
           data['configuration']['svc' + str(var)]['versions']['v1']['name'],
           data['configuration']['svc' + str(var)]['versions']['v1']['image'],
           data['configuration']['svc' + str(var)]['port']['port'])
    print(deployments)

What can be wrong?

Answer 1

Use format to put value of port in your string.

See this:-

>>> port = 'my string1'
>>> str1 = ''' this is the second string and here is {} '''.format(port)
>>> str1
' this is the second string and here is my string1 '