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

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 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.|  |  __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, start=0, stop=9223372036854775807, /)|      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, /, *, key=None, reverse=False)|      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