29 Essential Python Tips Every Beginner Must Know

Below are 29 concise Python beginner tips gathered from daily learning experience:

Switch drives in cmd by typing the drive letter (e.g., D:).

List directories on the current drive with dir.

Enter a folder using cd folder_name (space required).

After typing the first letters of a filename, press Tab for auto‑completion; repeat Tab to cycle through matches.

Combine d:, dir, and cd to navigate like double‑clicking.

Move up one level with cd ..; two levels with cd ../.. (spaces optional).

Open a prepared .txt in Python via python f:\Demo\hello.txt.

Use the appropriate file extension for each file type.

Add Python to the system PATH to run it from any directory (System → Advanced → Environment Variables → Path).

To add any program to PATH, copy its target path (excluding the .exe) and append it to the Path variable, separating entries with a semicolon.

Give variables descriptive names, e.g., name = 'mike'.

Use underscores for multi‑word variable names, e.g., student_number.

Write constants in all caps.

Strings are enclosed in quotes and occupy memory; variable names reference that memory.

Delete a variable with del variable_name.

In Python 2, prefix Chinese strings with u'' to treat them as Unicode.

In Notepad++, duplicate the current line with Ctrl+D.

Always save changes in Notepad++ before running the script.

Use Tab for path completion in cmd; you can run scripts directly after typing the path.

Use input('prompt') to get interactive input.

Cmd error line numbers correspond to Notepad++ line numbers.

Place the cursor at the end of a line (End) or on the line to edit.

Equality comparison uses ==; assignment uses =.

Terminate statements with a colon ( :).

Indentation determines which code block is executed.

Tab is not equal to four spaces; Python treats them differently. else must follow an if at the same indentation level.

Configure Notepad++ to convert tabs to four spaces for consistency.

Enable view of whitespace characters to see spaces and tabs.

Use elif for additional conditional branches between if and else.

These tips aim to streamline your Python workflow and reduce common beginner mistakes.