What kind of error is caused by improper spacing at the beginning of a line in Python code?

The error caused by improper spacing at the beginning of a line in Python code is called an "IndentationError". This error occurs when the spaces or tabs are not used properly to indent the Python code. Python uses indentation to determine the grouping of statements.

Here is a step by step explanation:

1. Python uses indentation (spaces and tabs) at the beginning of a line to determine the grouping of statements.

2. In many other programming languages, curly braces {} are used for this purpose. But Python uses indentation. This makes Python code look neat and clean.

3. If you do not follow proper indentation rules, Python interpreter can't understand how the statements are grouped.

4. If Python interpreter can't understand your code, it will throw an error. This error is called "IndentationError".

5. For example, if you write a for loop in Python, you have to indent the code inside the loop. If you don't do this, you will get an "IndentationError".

6. So, to avoid "IndentationError", always use proper indentation in your Python code.