fix: Pytest locally fails due to API_KEY env variable (TheAlgorithms#8737)

Author: CaedenPH

Diff for: web_programming/currency_converter.py

@@ -7,14 +7,9 @@
 
 import requests
 
+
 URL_BASE = "https://www.amdoren.com/api/currency.php"
-TESTING = os.getenv("CI", "")
-API_KEY = os.getenv("AMDOREN_API_KEY", "")
 
-if not API_KEY and not TESTING:
-    raise KeyError(
-        "API key must be provided in the 'AMDOREN_API_KEY' environment variable."
-    )
 
 # Currency and their description
 list_of_currencies = """
@@ -175,20 +170,31 @@
 
 
 def convert_currency(
-    from_: str = "USD", to: str = "INR", amount: float = 1.0, api_key: str = API_KEY
+    from_: str = "USD", to: str = "INR", amount: float = 1.0, api_key: str = ""
 ) -> str:
     """https://www.amdoren.com/currency-api/"""
+    # Instead of manually generating parameters
     params = locals()
+    # from is a reserved keyword
     params["from"] = params.pop("from_")
     res = requests.get(URL_BASE, params=params).json()
     return str(res["amount"]) if res["error"] == 0 else res["error_message"]
 
 
 if __name__ == "__main__":
+    TESTING = os.getenv("CI", "")
+    API_KEY = os.getenv("AMDOREN_API_KEY", "")
+
+    if not API_KEY and not TESTING:
+        raise KeyError(
+            "API key must be provided in the 'AMDOREN_API_KEY' environment variable."
+    )
+
     print(
         convert_currency(
             input("Enter from currency: ").strip(),
             input("Enter to currency: ").strip(),
             float(input("Enter the amount: ").strip()),
+            API_KEY
         )
     )