Python Coding Challange - Question with Answer (01110825)

 

Let’s break this down step by step:

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try:
   d = {"a": 1}
   print(d["b"])
except KeyError:
    print("Key missing")

1️⃣ try:

• This starts a try block — Python will run the code inside it, but if an error occurs, it will jump to the matching except block.

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2️⃣ d = {"a": 1}

• Creates a dictionary d with one key-value pair:

  • Key: "a"

  • Value: 1

So d looks like:

{"a": 1}

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3️⃣ print(d["b"])

• This tries to access the value for the key "b".

• Since "b" is not present in the dictionary, Python raises a KeyError.

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4️⃣ except KeyError:

• This block catches errors of type KeyError.

• Because the error matches, Python runs the code inside this block instead of stopping the program.

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5️⃣ print("Key missing")

• Prints the message "Key missing" to tell the user that the requested key doesn’t exist.

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✅ Final Output:

Key missing

Digital Image Processing using Python