iloc function in python

Original address: http://blog.csdn.net/caroline_wendy/article/details/23383995static functions (Staticmethod), class functions (Classmethod), differences in member functions (fully parsed)Defined:static function (@staticmethod): A static method that deals primarily with the logical association of this class, such as validating data;class function (@classmethod): A class method that focuses more on invoking

()print [i-I in a if aFilter (lambda x:x*x,a)Serialization:Only strings or binaries can be stored on the hard disk, so dictionaries, lists, etc. cannot be saved.Pickle is just the type of serialization used in Python.Pickle.dump (object, file handle) Pickle.load () pickle.dump (dic1,f)Json.dump () Json.load ()Regular Expressions:m = Re.match ("\d", matching object) match is matched from the beginning.View match to Character: M.group ()Re.search () Global lookup matchRe.findall () finds all matc

From C # To Python -- 3 function and function programming, In C #, there is no independent function. Only the class (dynamic or static) method is used. It refers to the member used to execute computing or other behaviors in the class. In Python, you can use a method similar

built-in functions /built-in function or Method There are many built-in functions in Python (see the 3.6.1 section), where the built-in functions are described built-in functions ord/built-in function ord Python's built-in function, Ord, is to convert a single character in an ASCII code table to the corresponding deci

parameter of the formal parameter.Default parameter does not pass the value is the default value, the pass value overrides the default value.def func2 (y, X, z=): print (x, y, z) func2 (1, 2, 3000)def input_information (name, sex= ' man '): With open (' Information ', encoding= ' utf-8 ', mode= ' a ') as F1: f1.write (' { }\t{}\n '. Format (name,sex)) while True: msg = input (' Please enter the user's name, gender \q or Q exit '). Strip () if msg.upper () = = ' Q ': Br

Introduction to the _ init _ method function in the Python class, the Python class constructor, And the python _ init _ If there is no _ init _ method function in a class, the instance object created using the class name is empty and is not initialized. If this method

Strip function prototype Declaration: S is a string, RM is the sequence of characters to be deleted. You can only delete characters or strings that start or end. The middle character or string cannot be deleted. S.strip (RM) deletes the character at the beginning and end of the s string that is in the RM delete sequence S.lstrip (RM) deletes the character at the beginning of the S string at the RM delete sequence S.rstrip (RM) deletes the character at

This section describes how to design and pass Multiple Parameter subfunctions. In Section 2.3, we discussed how to design a sub-function with parameters. Now we will study how to transmit the design methods of two or more parameters. Why do functions require parameters? In fact, the reason is very simple, that is, to give more data to the sub-function for processing. It seems too stretched to pass only one

A function is a piece of code that is organized, reusable, and used to implement a single, or associated, function.Functions can improve the modularity of applications and the reuse of code. You already know that Python provides a number of built-in functions, such as print (). But you can also make your own creative functions, which are called user-defined functions.One, define a functionYou can define a

This article mainly introduces common problems such as creating, calling, and function parameters, and variable scope of Python user-defined functions. For more information, see the organized and reusable functions, code segment used to implement a single, or associated function. Functions can improve the app's vigilance and reuse of code. You already know that

Functions are organized and reusable, and used to implement a single, or associated function code segment.Functions can improve the app's vigilance and reuse of code. You already know that Python provides many built-in functions, such as print (). But you can also create functions by yourself, which are called user-defined functions.1. Define a functionYou can define a