(some) Python statements

See class

def defines a user defined function object.

The for statement can be used, for example, to iterate over a numeric range or to iterate over the individual characters of a string.

See global and nonlocal

See if

See import

Explicitly do nothing.

def Foo():
    pass

raise raises an exception.

See also exception handling

while cond: iterates over a block of code until a certain condition (cond) becomes false.

See here.

yield

assert checks a condition if __debug__ is True. If the condition is False, it raises an AssertionError exception.

break

pass is Python's no-op statement.

return

del