A preliminary study of Python

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Indentation is very strict, otherwise an error occurs
Help documentation is the best way to learn
Repeating the same mistakes is the most wasted time, when the same mistake to remember not to find the cause of the problem

Invalid error may be missing colon
Three single quotes multiline comment
Drag All Black +tab multiple lines indent

Use 4 spaces to indent, not TAB
If possible, comment exclusive line
Use empty lines to separate functions and classes, and large chunks of code in functions.
Place the space on either side of the operator and behind the comma, but no space is added to the brackets: a = f (1, 2) + g (3, 4)

A preliminary study of Python