Implement the Function has_error Implement the function according to the specification. Use the test script testcurrency.py to aid your development before checking your answer below. CANNOT USE IF/CONDITIONAL STATEMENTS Instead, you should use what you know about boolean expressions 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 '{"success":false,"src":"","dst":"","error":"Source currency code is invalid."}' 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 '{"success": true, "src": "2 United States Dollars", "dst": "1.772814 Euros", "error": ""}' then this function returns False. The web server does NOT specify the number of spaces after the colons. The JSON '{"success":true, "src":"2 United States Dollars", "dst":"1.772814 Euros", "error":""}' 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) """
Implement the Function has_error
Implement the function according to the specification. Use the test script testcurrency.py to aid your development before checking your answer below. CANNOT USE IF/CONDITIONAL STATEMENTS Instead, you should use what you know about boolean expressions
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
'{"success":false,"src":"","dst":"","error":"Source currency code is invalid."}'
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
'{"success": true, "src": "2 United States Dollars", "dst": "1.772814 Euros", "error": ""}'
then this function returns False.
The web server does NOT specify the number of spaces after the colons. The JSON
'{"success":true, "src":"2 United States Dollars", "dst":"1.772814 Euros", "error":""}'
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)
"""
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