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 thequery 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 parsePrecondition: json a string provided by the web service (ONLY enforce the type)"""

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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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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