[Solved] What will be the output of the following code snippet?from sklearn.pipeline import Pipeline from sklearn.preprocessing import FunctionTransformer import numpy as np def add_one(X):... | SciPy

SciPy - Integration with Scientific Ecosystem

What will be the output of the following code snippet?

from sklearn.pipeline import Pipeline
from sklearn.preprocessing import FunctionTransformer
import numpy as np

def add_one(X):
    return X + 1

pipe = Pipeline([
    ('add', FunctionTransformer(add_one)),
])

X = np.array([1, 2, 3])
result = pipe.transform(X)
print(result)

AError: Pipeline has no transform method

B[1 2 3]

C[0 1 2]

D[2 3 4]

Step-by-Step Solution

Solution:

Step 1: Understand FunctionTransformer behavior
FunctionTransformer applies the function add_one to input data during transform.
Step 2: Apply the function to input array
Input array [1, 2, 3] plus 1 becomes [2, 3, 4].
Final Answer:
[2 3 4] -> Option D
Quick Check:
Input + 1 = Output [OK]

Quick Trick: FunctionTransformer applies function on transform call [OK]

Common Mistakes:

Assuming pipeline has no transform method
Forgetting function adds 1
Confusing fit and transform methods

Master "Integration with Scientific Ecosystem" in SciPy

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

More SciPy Quizzes

What will be the output of the following code snippet?

Step 1: Understand FunctionTransformer behavior

Step 2: Apply the function to input array

Final Answer:

Quick Check:

Want More Practice?