python how to convert <type 'str'> to <type 'dict'>-CodePudding

I have a below dictionary defined with IP address of the application for the respective region. Region is user input variable, based on the input i need to procees the IP in rest of my script.

app_list=["puppet","dns","ntp"]

dns={'apac':["172.118.162.93","172.118.144.93"],'euro':["172.118.76.93","172.118.204.93","172.118.236.93"],'cana':["172.118.48.93","172.118.172.93"]}
ntp={'asia':["172.118.162.93","172.118.148.93"],'euro':["172.118.76.93","172.118.204.93","172.118.236.93"],'cana':["172.118.48.93","172.118.172.93"]}
puppet={'asia':["172.118.162.2251","1932.1625.254.2493"],'euro':["172.118.76.21","1932.1625.254.2493"],'cana':["172.118.76.21","193.1625.254.249"]}

Code Tried

   region=raw_input("entee the region:")
    for appl in app_list:
            for ip in appl[region]:
                   <<<rest of operations with IP in script>>

When I tried the above code got the error mentioned below. I tried to convert the str object to dict using json and ast module but still did not succeedd.

Error received

TypeError: string indices must be integers, not str

As new to python unsure how to get the ip list based on the region

CodePudding user response：

The problem is that in each loop for appl in app_list appl will be a string and you are trying to index appl[region], so you are trying to index the string with another string. But actually you just want to loop over the dictionaries dns, ntp and puppet, so you could do this instead:

dns={'apac':["172.118.162.93","172.118.144.93"],'euro':["172.118.76.93","172.118.204.93","172.118.236.93"],'cana':["172.118.48.93","172.118.172.93"]}
ntp={'asia':["172.118.162.93","172.118.148.93"],'euro':["172.118.76.93","172.118.204.93","172.118.236.93"],'cana':["172.118.48.93","172.118.172.93"]}
puppet={'asia':["172.118.162.2251","1932.1625.254.2493"],'euro':["172.118.76.21","1932.1625.254.2493"],'cana':["172.118.76.21","193.1625.254.249"]}

app_list = [puppet, dns, ntp]

region = input("entee the region:")

for appl in app_list:
  for ip in appl.get(region, []):
    print(ip)

Notice that 1) app_list is now a list of the predefined dictionaries and 2) that you should indx the region using the get() method for dictionaries, because the region might not be present in a given dictionary, so you can return an empty list as default. Otherwise you could run into a KeyError.

I hope that's what you were looking for.

CodePudding user response：

problem 1: your loop implies that app_list is a nested dict, which it isn't

problem 2: appl is a key to a dict, not the value of the dict.

this works:

app_list={
"puppet": {'asia':["172.118.162.2251","1932.1625.254.2493"],'euro':["172.118.76.21","1932.1625.254.2493"],'cana':["172.118.76.21","193.1625.254.249"]},
"dns": {'apac':["172.118.162.93","172.118.144.93"],'euro':["172.118.76.93","172.118.204.93","172.118.236.93"],'cana':["172.118.48.93","172.118.172.93"]},
"ntp": {'asia':["172.118.162.93","172.118.148.93"],'euro':["172.118.76.93","172.118.204.93","172.118.236.93"],'cana':["172.118.48.93","172.118.172.93"]}
}

region=input("entee the region:")
print("")
for key in app_list:
  appl = app_list[key]
  if region in appl:
    for ip in appl[region]:
      print(ip)
  else:
    print("region not found in appl "   str(appl))

output

echo "asia" | python3 blubb.py
entee the region:
172.118.162.2251
1932.1625.254.2493
region not found in appl {'apac': ['172.118.162.93', '172.118.144.93'], 'euro': ['172.118.76.93', '172.118.204.93', '172.118.236.93'], 'cana': ['172.118.48.93', '172.118.172.93']}
172.118.162.93
172.118.148.93