Python Syntax and Reserved Keywords

🔹 What is Python Syntax?

Python syntax defines how Python code should be written and formatted. If the syntax is incorrect, the Python interpreter will raise errors.

Rule	Explanation	Example
Indentation is required	Python uses spaces/tabs instead of braces `{}`	`if 5 > 2:\n print("Five is greater")`
Case-sensitive	`Name` and `name` are different	`name = "John"\nName = "David"`
Statements end with newline	No semicolon (`;`) required	`print("Hello")`
Comments	Start with `#`	`# This is a comment`
Variable declaration	No `var` keyword, just assignment	`x = 10`

🔑 Python Reserved Keywords

Keywords are special reserved words that cannot be used as variable or function names. They are part of the Python language syntax.

False      await      else       import     pass
None       break      except     in         raise
True       class      finally    is         return
and        continue   for        lambda     try
as         def        from       nonlocal   while
assert     del        global     not        with
async      elif       if         or         yield

You cannot use these keywords as variable names.

They are case-sensitive and used internally by Python.

🧪 Check Keywords in Python

To list all keywords using code:

import keyword
print(keyword.kwlist)

🚫 Invalid Keyword Usage

Trying to use a keyword as a variable name results in an error:

def = 10  # ❌ Invalid: 'def' is a reserved keyword

✅ Correct way:

my_def = 10