Python’s identifiers are case-sensitive names for entities in the source code, i.e. for functions, classes and variables.
Some identifiers have a reserved meaning:
| Reserved Pattern | Example | Meaning |
|---|---|---|
| _* (leading underscore) | _do_something | Weak "internal use" indicator, e.g. from M import * does not import objects whose name starts with an underscore. |
| __ * (double leading underscore) | __common_name | Any identifier of the form __spam (at least two leading underscores, at most one trailing underscore) is textually replaced with _classname__spam, where classname is the current class name with leading underscore(s) stripped. Used to avoid name conflicts. |
| * (double leading and trailing underscore) | __init__ | "magic" objects or attributes that live in user-controlled namespaces. E.g. __init__ , __import__ or __file__ . Never invent such names; only use them as documented. |
Add some examples of identifiers and the above rules
Add some examples of errors when using keywords.
Show nicely formatted keyword list:
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