Example
Local and Global Variables
Local variables exist only inside functions. Global ones are accessible everywhere.
Results for “local variables”
Showing 1–10 of 12
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Quiz
Python Variable Scope Quiz
Free beginner quiz on Python variable scope: 15 questions on local and global variables, the global and nonlocal keywords, and nested functions.
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Quiz
Python Variables Quiz
Free beginner quiz on Python variables: 15 questions on naming, assignment, data types, type conversion and scope, with instant answers.
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Challenge
Shadowed fuel
refuel() assigns to fuel_kg inside the function, creating a local variable and leaving the global fuel unchanged. Predict the last line, compare both values, fix it by returning the total, then write…
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Article Mini projects
Medical dispenser - Don’t trust the user
…secret. Set MEDICATION_DISPENSER_SECRET environment variable for production.") return secret def _compute_hmac(self, message): """Compute HMAC-SHA256 of message using device secret""" return hmac.new(…
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Example
Scope in Nested Functions
The nonlocal keyword gives access to variables in the enclosing function.
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Example
Separating Namespaces
Namespaces isolate variables. Modules and functions create their own namespaces.
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Example
Functions with Parameters
Parameters allow passing data to functions. Functions become more flexible.
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Example
The global Keyword
The global keyword allows modifying a global variable inside a function.
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Article Python Fundamentals
Python Functions for Beginners
…greet_crew is the name. The rules are the same as for variable names: lowercase letters, words joined with underscores, no spaces, and it can't start with a number. The parentheses () are where inputs…
