Module Exprs

An assignment expression, such as x := y

An attribute expression, such as value.attr

The context of an augmented load. This is an artifact of the Python grammar which includes an AugLoad context, even though it is never used.

The augmented store context, the context of var in var += 1

An await expression such as await coro.

A boolean named constant, either True or False

A bytes constant, such as b'ascii'. Note that unadorned string constants such as "hello" are treated as Bytes for Python2, but Unicode for Python3.

A call expression, such as func(...)

The delete context, the context of var in del var

A dictionary expression, such as {'key':'value'}

An ellipsis expression, such as ...

An expression

A context in which an expression used

The boolean named constant False

A floating point numeric constant, such as 0.4 or 4e3

A formatted value (within a formatted string literal). For example, in the string f'hello {world!s}' the formatted value is world!s.

A formatted string literal expression, such as f'hello {world!s}'

A guard in a case statement

A conditional expression such as, body if test else orelse

An imaginary numeric constant, such as 3j

An immutable literal expression (except tuples). Consists of string (both unicode and byte) literals and numeric literals.

An integer numeric constant, such as 7 or 0x9

A list expression, such as [ 1, 3, 5, 7, 9 ]

The load context, the context of var in len(var)

A (plain variable) name expression, such as var. None, True and False are excluded.

A named constant, one of None, True or False

The None constant.

A numerical constant expression, such as 7 or 4.2

The parameter context, the context of var in def f(var): pass

A repr (backticks) expression, such as `value`

A set expression such as { 1, 3, 5, 7, 9 }

A slice. E.g 0:1 in the expression x[0:1]

A starred expression, such as the *rest in the assignment first, *rest = seq

The store context, the context of var in var = 0

A string constant.

A subscript expression, such as value[slice]

The boolean named constant True

A tuple expression such as ( 1, 3, 5, 7, 9 )

A unicode string expression, such as u"\u20ac". Note that unadorned string constants such as “hello” are treated as Bytes for Python2, but Unicode for Python3.

A yield expression, such as yield value

A yield expression, such as yield from value

A string constant. This is a placeholder class – use StrConst instead.