Python Coding Challenge - Question with Answer (ID 010926)

 

Explanation:

1. Assign x = 10

x = 10

A variable x is created and assigned the value 10.

x → 10

2. Create the Lambda Function

f = lambda a=x: a

Here, a lambda function is created and stored in f.

The important part is:

a=x

This gives parameter a a default value.

At the moment the lambda is created, x is 10.

So Python effectively stores:

f = lambda a=10: a

Therefore:

f() → 10

3. Change x

x = 20

Now x is changed from 10 to 20.

x → 20

However, this does not change the default value already stored inside the lambda.

The lambda still has:

a → 10

4. Call the Lambda

print(f())

f() is called without providing a value for a.

Therefore, Python uses the stored default value:

a → 10

So:

f() → 10

5. print() Displays the Result

The expression becomes:

print(10)

✅ Final Output

10

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Python Coding challenge - Day 1234| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Importing the ast Module

import ast

✅ Explanation

ast stands for Abstract Syntax Tree.

It is a built-in Python module used to work with Python source code.

ast.literal_eval() safely converts a string containing Python literals into actual Python objects.

Unlike eval(), it cannot execute arbitrary code, making it much safer.

ast Module

      │

      ▼

literal_eval()

↓

Safely Convert String

↓

Python Object

Nothing executes yet.

🔹 2. Creating a String

text = "{'x':[1,2,3]}"

✅ Explanation

A string is created.

Although it looks like a dictionary, it is still just plain text.

Current Memory

text

↓

"{'x':[1,2,3]}"

Type

↓

str

Visual Representation

+------------------+

| "{'x':[1,2,3]}"  |

+------------------+

It is not a dictionary yet.

🔹 3. Converting the String

obj = ast.literal_eval(text)

✅ Explanation

literal_eval() reads the string and converts it into a real Python object.

String

"{'x':[1,2,3]}"

becomes

{'x': [1, 2, 3]}

Current Memory

obj

↓

Dictionary

{

   'x' : [1,2,3]

}

Visual Representation

obj

 │

 ▼

Dictionary

┌──────────────┐

│ x ─────────┐ │

└────────────┼─┘

             ▼

        +---+---+---+

        | 1 | 2 | 3 |

        +---+---+---+

Now obj is a real Python dictionary.

🔹 4. Accessing the Dictionary Value

obj["x"]

✅ Explanation

Python looks for the key "x".

Current Memory

Dictionary

'x'

↓

[1,2,3]

Returned value

[1, 2, 3]

🔹 5. Accessing the Last Element

obj["x"][-1]

✅ Explanation

[-1] means last element of the list.

Visual Representation

List

+----+----+----+

| 1  | 2  | 3  |

+----+----+----+

  0    1    2

Negative Index

-3  -2  -1

         ▲

         │

         3

Python returns

3

🔹 6. Printing the Result

print(obj["x"][-1])

✅ Explanation

Python prints the last element of the list.

Output

3

🎯 Final Output

3

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Python Coding challenge - Day 1233| What is the output of the following Python Code?

Code Explanation:

🔹 1. Importing Enum and auto

from enum import Enum, auto

✅ Explanation

Enum and auto are imported from Python's built-in enum module.

Enum is used to create a collection of named constant values.

auto() automatically assigns values to enum members.

enum Module

      │

      ▼

 ┌────────────┐

 │ Enum       │

 │ auto()     │

 └────────────┘

Nothing executes yet.

🔹 2. Creating an Enum Class

class Day(Enum):

✅ Explanation

A new enumeration named Day is created.

Unlike a normal class:

Every variable inside becomes an Enum Member.

Enum members are constant values.

Current Memory

Day

↓

Enum Class

No members are assigned yet.

🔹 3. Creating the First Enum Member

MON = auto()

✅ Explanation

auto() automatically assigns the first integer value.

Since MON is the first member,

MON = 1

Current Memory

Day

MON → 1

🔹 4. Creating the Second Enum Member

TUE = auto()

✅ Explanation

auto() assigns the next available integer.

Since MON already has value 1,

TUE = 2

Current Memory

Day

MON → 1

TUE → 2

Visual Representation

Day

│

├── MON → 1

└── TUE → 2

🔹 5. Accessing an Enum Member

Day.TUE

✅ Explanation

Python accesses the enum member named TUE.

Current Memory

Day

↓

TUE

The object is

Day.TUE

🔹 6. Accessing .value

Day.TUE.value

✅ Explanation

Every Enum member has two important properties:

.name

.value

Current Memory

Day.TUE

↓

name = "TUE"

value = 2

Python returns

2

🔹 7. Printing the Result

print(Day.TUE.value)

✅ Explanation

Python prints the integer value assigned to TUE.

Output

2

🎯 Final Output

2

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