1 >>> dir(__builtins__)//查看内置函数（BIF）列表
2 ['ArithmeticError', 'AssertionError', 'AttributeError',
3 'BaseException', 'BlockingIOError', 'BrokenPipeError', 'BufferError', 'BytesWarning',
4 'ChildProcessError', 'ConnectionAbortedError', 'ConnectionError', 'ConnectionRefusedError', 'ConnectionResetError',
5 'DeprecationWarning',
6 'EOFError', 'Ellipsis', 'EnvironmentError', 'Exception',
7 'False', 'FileExistsError', 'FileNotFoundError', 'FloatingPointError', 'FutureWarning',
8 'GeneratorExit',
9 'IOError', 'ImportError', 'ImportWarning', 'IndentationError', 'IndexError', 'InterruptedError', 'IsADirectoryError',
10 'KeyError', 'KeyboardInterrupt',
11 'LookupError',
12 'MemoryError', 13 NameError', 'None', 'NotADirectoryError', 'NotImplemented', 'NotImplementedError',
14 'OSError', 'OverflowError',
15 'PendingDeprecationWarning', 'PermissionError', 'ProcessLookupError',
16 'RecursionError', 'ReferenceError', 'ResourceWarning', 'RuntimeError', 'RuntimeWarning',
17 'StopAsyncIteration', 'StopIteration', 'SyntaxError', 'SyntaxWarning', 'SystemError', 'SystemExit',
18 'TabError', 'TimeoutError', 'True', 'TypeError',
19 'UnboundLocalError', 'UnicodeDecodeError', 'UnicodeEncodeError', 'UnicodeError', 'UnicodeTranslateError', 'UnicodeWarning', 'UserWarning',
20 'ValueError',
21 'Warning', 'WindowsError',
22 'ZeroDivisionError',
23 '_', '__build_class__', '__debug__', '__doc__', '__import__', '__loader__', '__name__', '__package__', '__spec__',
24 'abs', 'all', 'any', 'ascii',
25 'bin', 'bool', 'bytearray', 'bytes',
26 'callable', 'chr', 'classmethod', 'compile', 'complex', 'copyright', 'credits',
27 'delattr', 'dict', 'dir', 'divmod',
28 'enumerate', 'eval', 'exec', 'exit',
29 'filter', 'float', 'format', 'frozenset',
30 'getattr', 'globals',
31 'hasattr', 'hash', 'help', 'hex',
32 'id', 'input', 'int', 'isinstance', 'issubclass', 'iter',
33 'len', 'license', 'list', 'locals',
34 'map', 'max', 'memoryview', 'min',
35 'next',
36 'object', 'oct', 'open', 'ord',
37 'pow', 'print', 'property',
38 'quit',
39 'range', 'repr', 'reversed', 'round',
40 'set', 'setattr', 'slice', 'sorted', 'staticmethod', 'str', 'sum', 'super',
41 'tuple', 'type',
42 'vars',
43 'zip']
44 >>> help(input)//查看内置函数（BIF）功能描述
45 Help on built-in function input in module builtins:
46
47 input(prompt=None, /)
48 Read a string from standard input. The trailing newline is stripped.
49
50 The prompt string, if given, is printed to standard output without a
51 trailing newline before reading input.
52
53 If the user hits EOF (*nix: Ctrl-D, Windows: Ctrl-Z+Return), raise EOFError.
54 On *nix systems, readline is used if available.
55
56 >>> help(range)
57 Help on class range in module builtins:
58
59 class range(object)
60 | range(stop) -> range object
61 | range(start, stop[, step]) -> range object
62 |
63 | Return an object that produces a sequence of integers from start (inclusive)
64 | to stop (exclusive) by step. range(i, j) produces i, i+1, i+2, ..., j-1.
65 | start defaults to 0, and stop is omitted! range(4) produces 0, 1, 2, 3.
66 | These are exactly the valid indices for a list of 4 elements.
67 | When step is given, it specifies the increment (or decrement).
68 |
69 | Methods defined here:
70 |
71 | __contains__(self, key, /)
72 | Return key in self.
73 |
74 | __eq__(self, value, /)
75 | Return self==value.
76 |
77 | __ge__(self, value, /)
78 | Return self>=value.
79 |
80 | __getattribute__(self, name, /)
81 | Return getattr(self, name).
82 |
83 | __getitem__(self, key, /)
84 | Return self[key].
85 |
86 | __gt__(self, value, /)
87 | Return self>value.
88 |
89 | __hash__(self, /)
90 | Return hash(self).
91 |
92 | __iter__(self, /)
93 | Implement iter(self).
94 |
95 | __le__(self, value, /)
96 | Return self<=value.
97 |
98 | __len__(self, /)
99 | Return len(self).
100 |
101 | __lt__(self, value, /)
102 | Return self<value.
103 |
104 | __ne__(self, value, /)
105 | Return self!=value.
106 |
107 | __new__(*args, **kwargs) from builtins.type
108 | Create and return a new object. See help(type) for accurate signature.
109 |
110 | __reduce__(...)
111 | helper for pickle
112 |
113 | __repr__(self, /)
114 | Return repr(self).
115 |
116 | __reversed__(...)
117 | Return a reverse iterator.
118 |
119 | count(...)
120 | rangeobject.count(value) -> integer -- return number of occurrences of value
121 |
122 | index(...)
123 | rangeobject.index(value, [start, [stop]]) -> integer -- return index of value.
124 | Raise ValueError if the value is not present.
125 |
126 | ----------------------------------------------------------------------
127 | Data descriptors defined here:
128 |
129 | start
130 |
131 | step
132 |
133 | stop