建设网站后期需要哪些,品牌策略,珠海注册公司,wordpress全站ajax插件python#xff1a;通过help函数来查看帮助信息 文章目录 python#xff1a;通过help函数来查看帮助信息实例查看list类的一些对象的行为具体查看list类的对象的行为 这些是这些行为的使用描述 实例
查看list类的一些对象的行为
help(list)# 输出内容
Help on class list in…python通过help函数来查看帮助信息 文章目录 python通过help函数来查看帮助信息实例查看list类的一些对象的行为具体查看list类的对象的行为 这些是这些行为的使用描述 实例
查看list类的一些对象的行为
help(list)# 输出内容
Help on class list in module builtins:class list(object)| list(iterable(), /)| | Built-in mutable sequence.| | If no argument is given, the constructor creates a new empty list.| The argument must be an iterable if specified.| | Methods defined here:| | __add__(self, value, /)| Return selfvalue.| | __contains__(self, key, /)| Return key in self.| | __delitem__(self, key, /)| Delete self[key].| | __eq__(self, value, /)| Return selfvalue.| | __ge__(self, value, /)| Return selfvalue.| | __getattribute__(self, name, /)| Return getattr(self, name).| | __getitem__(...)| x.__getitem__(y) x[y]| | __gt__(self, value, /)| Return selfvalue.| | __iadd__(self, value, /)| Implement selfvalue.| | __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 selfvalue.| | __len__(self, /)| Return len(self).| | __lt__(self, value, /)| Return selfvalue.| | __mul__(self, value, /)| Return self*value.| | __ne__(self, value, /)| Return self!value.| | __repr__(self, /)| Return repr(self).| | __reversed__(self, /)| Return a reverse iterator over the list.| | __rmul__(self, value, /)| Return value*self.| | __setitem__(self, key, value, /)| Set self[key] to value.| | __sizeof__(self, /)| Return the size of the list in memory, in bytes.| | append(self, object, /)| Append object to the end of the list.| | clear(self, /)| Remove all items from list.| | copy(self, /)| Return a shallow copy of the list.| | count(self, value, /)| Return number of occurrences of value.| | extend(self, iterable, /)| Extend list by appending elements from the iterable.| | index(self, value, start0, stop9223372036854775807, /)| Return first index of value.| | Raises ValueError if the value is not present.| | insert(self, index, object, /)| Insert object before index.| | pop(self, index-1, /)| Remove and return item at index (default last).| | Raises IndexError if list is empty or index is out of range.| | remove(self, value, /)| Remove first occurrence of value.| | Raises ValueError if the value is not present.| | reverse(self, /)| Reverse *IN PLACE*.| | sort(self, /, *, keyNone, reverseFalse)| Sort the list in ascending order and return None.| | The sort is in-place (i.e. the list itself is modified) and stable (i.e. the| order of two equal elements is maintained).| | If a key function is given, apply it once to each list item and sort them,| ascending or descending, according to their function values.| | The reverse flag can be set to sort in descending order.| | ----------------------------------------------------------------------| Class methods defined here:| | __class_getitem__(...) from builtins.type| See PEP 585| | ----------------------------------------------------------------------| Static methods defined here:| | __new__(*args, **kwargs) from builtins.type| Create and return a new object. See help(type) for accurate signature.| | ----------------------------------------------------------------------| Data and other attributes defined here:| | __hash__ None
具体查看list类的对象的行为
help(list.append) # 查看append行为
help(list.pop) # 查看pop行为# 输出内容
Help on method_descriptor:append(self, object, /)Append object to the end of the list.Help on method_descriptor:pop(self, index-1, /)Remove and return item at index (default last).Raises IndexError if list is empty or index is out of range.这些是这些行为的使用描述
