Below I have code that has given me the True or False that follows 'success', I now need to convert if it is true to False and if it is False to True. How do I do this? None of your other responses have given correct coding for the following need.

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