Python-wait for one process to finish before starting next one

linux starter · 02-14-2018, 08:40 AM

Hello,

i'm new to python

I have script which go through JSON file,look for values in email field, for each value found it should create new EC2 instance with field in email adrress (part after @ removed) as user name, for every user it should prompt for number of instances.It all works fine when one user is in JSON file, but how to make python process one user at a time (if we have more than one email address in JSON file, first create machine for one user,wait until finishes, then prompt for number of instances for other user, wait until machine is created, then prompt for number of instances for 3-rd user, and so on

Code:

#!/bin/python
import json
from pprint import pprint

json_data=open('./my.json')
data = json.load(json_data)

json_data.close()

for i in range (0, len (data['customers'])):
    #print data['customers'][i]['email']
    k=data['customers'][i]['email']
    #print(k.split('@')[0])
    user=k.split('@')[0]
    print(user)


enter = int(input('Enter number of instances: '))
from python_terraform import *
tf = Terraform(working_dir='/home/ja/terraform-course/demo-2b', variables={'count':enter,'INSTANCE_USERNAME':user})
tf.plan(no_color=IsFlagged, refresh=False, capture_output=True)
approve = {"auto-approve": True}
print(tf.plan())
print(tf.apply(**approve))
print("All is done for user")

Sefyir · 02-15-2018, 09:49 PM

If I understand this correctly..

Take each "customer" found in data['customers'] and run the below code?

Code:

enter = int(input('Enter number of instances: '))
from python_terraform import *
tf = Terraform(working_dir='/home/ja/terraform-course/demo-2b', variables={'count':enter,'INSTANCE_USERNAME':user})
tf.plan(no_color=IsFlagged, refresh=False, capture_output=True)
approve = {"auto-approve": True}
print(tf.plan())
print(tf.apply(**approve))
print("All is done for user")

Perhaps just include it in the for loop?

Code:

for i in data['customers']:
    #print data['customers'][i]['email']
    k=data['customers'][i]['email']
    #print(k.split('@')[0])
    user=k.split('@')[0]
    print(user)

    enter = int(input('Enter number of instances: '))                           
    from python_terraform import *                                              
    tf = Terraform(working_dir='/home/ja/terraform-course/demo-2b', variables={'count':enter,'INSTANCE_USERNAME':user})
    tf.plan(no_color=IsFlagged, refresh=False, capture_output=True)             
    approve = {"auto-approve": True}                                            
    print(tf.plan())                                                            
    print(tf.apply(**approve))                                                  
    print("All is done for user")

linux starter · 02-16-2018, 12:24 PM

thanks,

i just created function and count put in JSON file

#!/bin/python
import json
from pprint import pprint
from python_terraform import *

def myfunc():

tf = Terraform(working_dir='/home/ja/terraform-course/demo-2b', variables={'count':count,'INSTANCE_USERNAME':user})
tf.plan(no_color=IsFlagged, refresh=False, capture_output=False)
approve = {"auto-approve": True}
print(tf.plan())
print(tf.apply(**approve))
return

json_data=open('./my.json')
data = json.load(json_data)

json_data.close()

for i in range (0, len (data['customers'])):
#print data['customers'][i]['email']
k=data['customers'][i]['email']
#print(k.split('@')[0])
user=k.split('@')[0]
#print(user)
count=data['customers'][i]['instances']
#print(count)
#enter = int(input('Enter number of instances: '))
myfunc()