Python是一种面向对象的编程语言，它的核心概念是类。在Python中，类是创建对象的模板，它包含了一组属性和方法。当我们需要查看类的函数时，通常有以下几种方法。一、使用help函数
Python内置的help函数可以帮助我们查看类的函数。我们可以使用help函数来获取类的文档字符串，文档字符串包含了该类的所有方法和属性的详细介绍。代码如下：
```python
class MyClass:
def func1(self):
"""
This is func1
"""
pass
def func2(self):
"""
This is func2
"""
pass
help(MyClass)
```
```
class MyClass(builtins.object)
| Methods defined here:
|
| func1(self)
| This is func1
|
| func2(self)
| This is func2
|
| ----------------------------------------------------------------------
| Data descriptors defined here:
|
| __dict__
| dictionary for instance variables (if defined)
|
| __weakref__
| list of weak references to the object (if defined)
|
| ----------------------------------------------------------------------
| Data and other attributes defined here:
|
| __module__ = '__main__'
| Module name.
|
| ----------------------------------------------------------------------
| Methods inherited from builtins.object:
|
| __delattr__(self,name,/)
| Implement delattr(self,name).
|
| __dir__(...)
| __dir__() -> list
| default dir() implementation
|
| __eq__(self,other,/)
| Return self==value.
|
| __format__(...)
| Default object formatter.
|
| __ge__(self,/)
| Return self>=value.
|
| __getattribute__(self,/)
| Return getattr(self,name).
|
| __gt__(self,/)
| Return self>value.
|
| __hash__(self,/)
| Return hash(self).
|
| __init__(self,/,*args,**kwargs)
| Initialize self. See help(type(self)) for accurate signature.
|
| __init_subclass__($self,**kwargs)
| This method is called when a class is subclassed.
|
| __le__(self,/)
| Return self
|
| __lt__(self,/)
| Return self | | __ne__(self,/) | Return self!=value. | | __new__(*args,**kwargs) from builtins.type | Create and return a new object. See help(type) for accurate signature. | | __reduce__(...) | Helper for pickle. | | __reduce_ex__(...) | Helper for pickle. | | __repr__(self,/) | Return repr(self). | | __setattr__(self,value,/) | Implement setattr(self,value). | | __sizeof__(...) | __sizeof__() -> int | size of object in memory,in bytes | | __str__(self,/) | Return str(self). | | __subclasshook__(...) | Abstract classes can override this to customize issubclass(). | | ---------------------------------------------------------------------- | Static methods inherited from builtins.object: | | __new__(*args,**kwargs) from builtins.type | Create and return a new object. See help(type) for accurate signature. | | ---------------------------------------------------------------------- | Data descriptors inherited from builtins.object: | | __class__ | type(object_or_name) -> the object's type | | __delattr__ | x.__delattr__('name') del x.name | | __dict__ | dictionary for instance variables (if defined) | | __dir__ | Default dir() implementation. | | __doc__ | str(object='') -> str | str(bytes_or_buffer[,encoding[,errors]]) -> str | | Create a new string object from the given object. If encoding or | errors is specified,then the object must expose a data buffer | that will be decoded using the given encoding and error handler. | Otherwise,returns the result of object.__str__() (if defined) | or repr(object). | encoding defaults to sys.getdefaultencoding(). | errors defaults to 'strict'. | | __eq__ | Return self==value. | | __format__ | Default object formatter. | | __ge__ | Return self>=value. | | Return getattr(self,name). | | __gt__ | Return self>value. | | __hash__ | Return hash(self). | | __init_subclass__ | This method is called when a class is subclassed. | | __le__ | Return self | | __lt__ | Return self | | __ne__ | Return self!=value. | | __new__ | Create and return a new object. See help(type) for accurate signature. | | __reduce__ | Helper for pickle. | | __reduce_ex__ | Helper for pickle. | | __repr__ | Return repr(self). | | __setattr__ | Implement setattr(self,value). | | __sizeof__ | __sizeof__() -> int | size of object in memory,in bytes | | __str__ | Return str(self). | | __subclasshook__ | Abstract classes can override this to customize issubclass(). | | ---------------------------------------------------------------------- | Static methods inherited from builtins.type: | | __call__(*args,**kwargs) from builtins.object | Call self as a function. | | __getattribute__(*args,**kwargs) from builtins.object | Return getattr(self,name). | | ---------------------------------------------------------------------- | Data descriptors inherited from builtins.type: | | __abstractmethods__ | | __base__ | | __bases__ | | __basicsize__ | | __call__ | | __classcell__ | | __delattr__ | | __dict__ | | __dictoffset__ | | __dir__ | | __doc__ | | __eq__ | | __flags__ | | __format__ | | __ge__ | | | __gt__ | | __hash__ | | __init__ | | __init_subclass__ | | __instancecheck__ | | __itemsize__ | | __le__ | | __lt__ | | __module__ | | __mro__ | | __name__ | | __ne__ | | __new__ | | __prepare__ | | __qualname__ | | __reduce__ | | __reduce_ex__ | | __repr__ | | __setattr__ | | __sizeof__ | | __str__ | | __subclasscheck__ | | __subclasses__ | | __subclasshook__ | | ---------------------------------------------------------------------- | Static methods inherited from object: | | __format__($self,format_spec) | Return a formatted version of the object as described by format_spec. | | __hash__($self,/) | Return hash(self). | | __init_subclass__$($self,**kwargs) | This method is called when a class is subclassed. | | __sizeof__($self,/) | Return the size of the object in bytes. | | __subclasshook__($self,subclass) | Abstract classes can override this to customize issubclass(). | | ---------------------------------------------------------------------- | Data descriptors inherited from object: | | __class__ | type(object_or_name) -> the object's type | | __delattr__ | x.__delattr__('name') del x.name | | __dict__ | dictionary for instance variables (if defined) | | __dir__ | Default dir() implementation. | | __doc__ | str(object='') -> str | str(bytes_or_buffer[,in bytes | | __str__ | Return str(self). | | __subclasshook__ | Abstract classes can override this to customize issubclass(). ``` 从输出结果可以看出，help函数不仅可以查看类的方法，还可以查看类的属性和继承关系等信息。 二、使用dir函数 dir函数可以列出一个对象的所有属性和方法。对于类来说，dir函数可以列出该类及其基类的所有属性和方法。代码如下： ```python class MyClass: def func1(self): """ This is func1 """ pass def func2(self): """ This is func2 """ pass print(dir(MyClass)) ``` ``` ['__class__','__delattr__','__dict__','__dir__','__doc__','__eq__','__format__','__ge__','__getattribute__','__gt__','__hash__','__init__','__init_subclass__','__le__','__lt__','__module__','__ne__','__new__','__reduce__','__reduce_ex__','__repr__','__setattr__','__sizeof__','__str__','__subclasshook__','__weakref__','func1','func2'] ``` 从输出结果可以看出，dir函数返回一个列表，其中包含类的所有方法和属性。 三、使用inspect模块 Python的inspect模块可以帮助我们获取类的方法和属性的更多信息，例如方法的参数和返回值等。代码如下： ```python import inspect class MyClass: def func1(self,x: int,y: int) -> int: """ This is func1 """ return x + y def func2(self): """ This is func2 """ pass print(inspect.signature(MyClass.func1)) ``` ``` (x: int,y: int) -> int ``` 从输出结果可以看出，inspect.signature函数返回一个方法的签名，包括方法的参数和返回值类型。 综上所述，我们可以使用help函数、dir函数和inspect模块来查看类的函数。其中help函数可以查看类的所有方法和属性的详细介绍，dir函数可以列出类的所有方法和属性，而inspect模块可以提供更多的方法信息。我们可以根据具体的需求来选择合适的方法来查看类的函数。
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