Literals in Python

₍stɚ₎ str literals

A str literal indicates a str value. It can be written with quotation marks or apostrophes.

Railroad diagram (simplified)

str literal
        .-.                                .-. 
|-|--->( " )--->.--------------------.--->( " )--->|-|
        '-'     ^                    |     '-'
                |   .-----------.    |
                '---| character |<---'
                    '-----------'
str literal
        .-.                                .-. 
|-|--->( ' )--->.--------------------.--->( ' )--->|-|
        '-'     ^                    |     '-'
                |   .-----------.    |
                '---| character |<---'
                    '-----------'

A str literal

'Hallo, Welt'

A str literal

"Hallo, Welt"

Evaluation of the expression »"abc"« with subsequent output of a text representation of the object obtained

                    evaluation        text representation
   "abc"  ---------------------> abc ---------------------> 'abc'
  expression                   object                text representation

Refactors

Transforming the (source code of a )program that meets its requirements is transformed to another (source code of a )program that also meets the same requirements is called a refactor.

Program 0

"abc"

Program 1

'abc'

Decimal Numerals

If a literal consists only of digits, the quotation marks or apostrophes can be omitted.

Input of an expression and output of a text representation of its value

To improve readability, the underscore can be used between digits without changing the value of the literal.

Input of an expression and output of a text representation of its value

32_767

Hexadecimal numerals

In the hexadecimal system, the letters starting from »A« stand for the values starting from ten, and the value of second digit from the right is multiplied by 16. So »B0« means ‹ 11×16 + 0 ›.

Input of an expression and output of a text representation of its value

0xB0

Decimal places

Decimal places can be delimited by a point ».«. The value is not always displayed exactly. Deviations can occur, especially in the last few digits.

Input of an expression and output of a text representation of its value

3.1415926535897932

3.141592653589793

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