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What is wrong with this code if it raises an ImportError?

medium📝 Debug Q14 of 15
Python - Modules and Code Organization
What is wrong with this code if it raises an ImportError?
import sys
sys.path = '/my/custom/path'
import mymodule
AThe import statement must come before modifying sys.path
BYou cannot modify sys.path at runtime
Csys.path should be a list, not a string
Dsys.path must be cleared before adding new paths
Step-by-Step Solution
Solution:
  1. Step 1: Check the type of sys.path

    sys.path must be a list of strings, but here it is assigned a single string.
  2. Step 2: Understand the error cause

    Assigning a string breaks the list structure, so Python cannot find modules properly, causing ImportError.
  3. Final Answer:

    sys.path should be a list, not a string -> Option C
  4. Quick Check:

    sys.path must be list, not string [OK]
Quick Trick: sys.path must always be a list of paths [OK]
Common Mistakes:
  • Assigning a string instead of list to sys.path
  • Thinking import order always matters here
  • Believing sys.path cannot be changed at runtime

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