可以使用python 的內(nèi)置方法 dir() 或者h(yuǎn)elp() 查看 某個(gè)對(duì)象所擁有的方法和屬性, 二者間的區(qū)別是:

• dir() : 只是得到方法或者屬性的名稱

• help():不但可以得到對(duì)象的方法和屬性名稱, 同時(shí)也可以得到這些方法或者屬性的使用方式的描述

dir():

print(dir("str")) # 列出字符串的方法名稱和屬性名稱, 也可以傳入某個(gè)對(duì)象變量名, dir(obj_name)

輸出:

['__add__', '__class__', '__contains__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__iter__', '__le__', '__len__', '__lt__', '__mod__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__rmod__', '__rmul__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'capitalize', 'casefold', 'center', 'count', 'encode', 'endswith', 'expandtabs', 'find', 'format', 'format_map', 'index', 'isalnum', 'isalpha', 'isdecimal', 'isdigit', 'isidentifier', 'islower', 'isnumeric', 'isprintable', 'isspace', 'istitle', 'isupper', 'join', 'ljust', 'lower', 'lstrip', 'maketrans', 'partition', 'replace', 'rfind', 'rindex', 'rjust', 'rpartition', 'rsplit', 'rstrip', 'split', 'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill']

help():

print(help("list")) # 列出列表的方法名稱和屬性名稱,并進(jìn)行使用方式的描述, 也可以傳入某個(gè)對(duì)象變量名, dir(obj_name) ''' 遇到問題沒人解答？小編創(chuàng)建了一個(gè)Python學(xué)習(xí)交流QQ群：579817333 尋找有志同道合的小伙伴，互幫互助,群里還有不錯(cuò)的視頻學(xué)習(xí)教程和PDF電子書！ ''' Help on class list in module builtins:class list(object)| list() -> new empty list| list(iterable) -> new list initialized from iterable's items| | Methods defined here:| | __add__(self, value, /)| Return self+value.| | __contains__(self, key, /)| Return key in self.| | __delitem__(self, key, /)| Delete self[key].| | __eq__(self, value, /)| Return self==value.| | __ge__(self, value, /)| Return self>=value.| | __getattribute__(self, name, /)| Return getattr(self, name).| | __getitem__(...)| x.__getitem__(y) <==> x[y]| | __gt__(self, value, /)| Return self>value.| | __iadd__(self, value, /)| Implement self+=value.| | __imul__(self, value, /)| Implement self*=value.| | __init__(self, /, *args, **kwargs)| Initialize self. See help(type(self)) for accurate signature.| | __iter__(self, /)| Implement iter(self).| | __le__(self, value, /)| Return self<=value.| | __len__(self, /)| Return len(self).| | __lt__(self, value, /)| Return self<value.| | __mul__(self, value, /)| Return self*value.n| | __ne__(self, value, /)| Return self!=value.| | __new__(*args, **kwargs) from builtins.type| Create and return a new object. See help(type) for accurate signature.| | __repr__(self, /)| Return repr(self).| | __reversed__(...)| L.__reversed__() -- return a reverse iterator over the list| | __rmul__(self, value, /)| Return self*value.| | __setitem__(self, key, value, /)| Set self[key] to value.| | __sizeof__(...)| L.__sizeof__() -- size of L in memory, in bytes| | append(...)| L.append(object) -> None -- append object to end| | clear(...)| L.clear() -> None -- remove all items from L| | copy(...)| L.copy() -> list -- a shallow copy of L| | count(...)| L.count(value) -> integer -- return number of occurrences of value| | extend(...)| L.extend(iterable) -> None -- extend list by appending elements from the iterable| | index(...)| L.index(value, [start, [stop]]) -> integer -- return first index of value.| Raises ValueError if the value is not present.| | insert(...)| L.insert(index, object) -- insert object before index| | pop(...)| L.pop([index]) -> item -- remove and return item at index (default last).| Raises IndexError if list is empty or index is out of range.| | remove(...)| L.remove(value) -> None -- remove first occurrence of value.| Raises ValueError if the value is not present.| | reverse(...)| L.reverse() -- reverse *IN PLACE*| | sort(...)| L.sort(key=None, reverse=False) -> None -- stable sort *IN PLACE*| | ----------------------------------------------------------------------| Data and other attributes defined here:| | __hash__ = NoneNone

總結(jié)

以上是生活随笔為你收集整理的python 使用dir() help() 查看一个对象所有拥有的方法和属性的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。