$28.$ Implement the Function has$\_$error

Implement the function according to the specification. Remember that you may not use conditionals $($if$-$statements$).$ Instead, you should use what you know about boolean expressions. Use the test script testcurrency.py to aid your development before checking your answer below.

def has$\_$error$($json$)$:

$"""$

Returns True if the response to a currency query encountered an error.

Given a JSON string provided by the web service, this function returns True if the

query failed and there is an error message. For example, if the json is

$\text{'}\{"$success$"$:false,"src$"$:$"","$dst$"$:$"",$"error":"Source currency code is invalid."$\}\text{'}$

then this function returns True $($It does NOT return the error message

'Source currency code is invalid'$).$ On the other hand if the json is

$\text{'}\{"$success$"$: true, $"$src$"$: $"2$ United States Dollars", $"$dst$"$: $"1\mathrm{.}772814$ Euros", "error": $""\}\text{'}$

then this function returns False.

The web server does NOT specify the number of spaces after the colons. The JSON

$\text{'}\{"$success$"$:true, $"$src$"$:$"2$ United States Dollars", $"$dst$"$:$"1\mathrm{.}772814$ Euros", "error":""$\}\text{'}$

is also valid $($in addition to the examples above$).$

Parameter json: a json string to parse

Precondition: json a string provided by the web service $($ONLY enforce the type$)$

$"""$

start $=$ introcs.find$\_$str$($json$,\text{'}"$success$"\text{'})$

start $=$ introcs.find$\_$str$($json$,\text{'}$:$\text{'},$ start$)+1$

start $=$ introcs.find$\_$str$($json$,\text{'}$:$\text{'})$

start $>=0$

end $=$ introcs.find$\_$str$($json$,\text{'},\text{'})$

end $>=0$

result $=$ introcs.strip$($json$[$start$+1$:end$])$

return result

if result is 'true':

return False

I cannot get the correct True or False answer. The result should return the opposite of what is following success in the json. I have tried all of the solutions that have been given to me and nothing works.