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This article mainly introduces how to implement the query in python, which is very detailed and has certain reference value. Friends who are interested must finish reading it!

Query

1) query the parameters of the function

When we want to know which parameters a function will accept, we can use the following method to query.

Import inspectprint (inspect.getargspec (func))

2) query the properties of objects

In addition to using dir () to query the properties of an object, we can use the following built-in (built-in) function to confirm whether an object has a property:

Hasattr (obj, attr_name) # attr_name is a string

For example:

A = [1, 2, 3] print (hasattr (a)

2) query the class and class name to which the object belongs

A = [1, 2, 3] print a.__class__print a.classic classrooms. Naming names _

3) query parent class

We can use the _ _ base__ attribute to query the parent class of a class:

Cls.__base__

For example:

Print (list.__base__) above is all the contents of the article "how to query in python". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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