Python Keywords and Identifiers

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1) List All Python Keywords

Write code to import the keyword module and print all Python keywords.

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2) Check If a Word Is a Keyword

Ask the user for a word and print whether it is a Python keyword.

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3) Valid Identifier Check

Ask the user for a string and check if it’s a valid Python identifier (use .isidentifier()).

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4) Create Valid Identifiers

Create 5 valid identifiers (variables) and assign them values. Print each variable.

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5) Create Invalid Identifiers

List 5 invalid identifier names in a comment and explain why they’re invalid.

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6) Test Identifiers Programmatically

Write a loop that checks a list of strings (["abc","123","my-var","_name","for"]) and prints whether each is a valid identifier.

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7) Avoid Keywords as Identifiers

Try assigning a value to a keyword like if = 5 and observe the error.

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8) Convention — Lowercase Identifiers

Create 3 identifier names following lowercase with underscores convention (PEP8 style) and print them.

Example:

student_name = "Alice"

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9) Identifier With Numbers

Assign values to valid identifiers that include numbers (e.g., var1, num2), then print.

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10) Long Identifier

Create a long identifier (more than 15 characters) that is valid and print its value.

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11) Single-Character Identifiers

Create 3 variables with single-character names (like a, b, c) and print them.

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12) Mixed Case Identifiers

Create identifiers using camelCase (e.g., myVariableName) and print their values.

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13) Compare Identifier and Keyword

Ask user for input string; print whether it’s a keyword, a valid identifier, or neither.

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14) Store Keywords in a List

Write code to get all Python keywords as a list and print the count of keywords.

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15) Rename Variable for Better Readability

Given code:

x = 10
y = "Python"

Rename x and y to more meaningful identifiers and print them.

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16) Invalid Identifiers Explained

In comments, explain why each of the following is invalid:

2num
my-var
class

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17) Keywords in Conditions

Write a simple if statement using keyword if, else, and print().

Example:

if True:
    print("Yes")
else:
    print("No")

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18) Create a Function With a Good Name

Write a function with a valid identifier name that prints a message.

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19) Check Identifier in Code

Define a string in code and then check if it’s a valid identifier using Python’s built-in method.

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20) Generate Identifiers Dynamically

Store a list like ["varA","varB","varC"], loop through it, and print whether each is a valid identifier.

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🧠 Rules Practiced

✔ Identifiers cannot start with a digit ✔ Identifiers cannot be a Python keyword ✔ Identifiers can contain letters, numbers, and underscores (_) ✔ Python keywords are reserved words (like if, for, while, class, etc.) ✔ Use .isidentifier() to test valid identifiers ✔ Use the keyword module to list keywords

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📌 Helpful Code Snippets

List Python keywords

import keyword
print(keyword.kwlist)

Check if a string is a keyword

import keyword
s = "if"
print(keyword.iskeyword(s))   # True

Check if a string is valid identifier

name = "my_var1"
print(name.isidentifier())     # True

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canvil: 333f6c7d-6876-4f7e-b6ad-1bdb2233f5c1