python rfind

This article mainly introduces the RFind () method in Python using the detailed, is the basic knowledge of Python, need friends can refer to the The RFind () method returns the last index found by the child str, or-1, optionally restricting the search string string[beg:end] If there is no such index. Grammar The fol

This article is reproduced from http://blog.csdn.net/youxin2012/article/details/9162415Application of Find () in string (RFind ()similar, just looking from reverse)The prototypes are as follows: (1) size_t find (const string str, size_t pos = 0) const; Find Object--string Class object (2) size_t find (const char* s, size_t pos = 0) const; Find Object--string (3) size_t find (const char* s, size_t pos, size_t N) const; Find Object--the first n characte

The function returns the position of the target string (key) that was last matched in the source stringIf no matching position is found then return String::npos, which is an unsigned shaped number that can be printed to seeString::rfind#include "stdafx.h" #include 　　The result of the final operation:String::rfind

application of Find () in string (RFind () similar, only from reverse lookup)The prototype is as follows:(1) size_t find (const string str, size_t pos = 0) const; Find object--string Class object(2) size_t find (const char* s, size_t pos = 0) const;//Find Object--string(3) size_t find (const char* s, size_t pos, size_t N) const; Find Object--the first n characters of a string(4) size_t find (char c, size_t pos = 0) const; Find objects--charactersResul

Python built-in function filter, python Function filter Python built-in Function filter class filter(object): """ filter(function or None, iterable) --> filter object Return an iterator yielding those items of iterable for which function(item) is true. If function is None, return the items that are true. """ Filter (func, iterator) Func: the value obtained from

Summary of Python built-in string methods, python strings String processing is a very common skill, but there are too many built-in string methods in Python that are often forgotten. For quick reference, I wrote examples for each built-in method based on Python 3.5.1 and classified them, easy for indexing. PS: You can

Python built-in string processing functions (covering daily use), python built-in Str = 'python String function' Generate the String variable str = 'python String function' String Length acquisition: len (str)Example: print '% s length = % d' % (str, len (str )) Letter ProcessingAll uppercase: str. upper ()All lower ca

the start index and end is the end index, both of which can be omitted if start omits the description to find the beginning of the string header, or if end omits to find the end of the string, if all is omitted to find all the strings. Str.rfind (sub[, start[,end]]). Similar to the Find method, the difference is if you find the index that returns the most right-hand position. If only one virgin string is found within the scope of the lookup, here the Find and

Sharing of multi-thread port scanning tools implemented by Python and python port scanning It was written two nights last night and finally the Py Port Scanner was finished. Let's call it version 0.1 as a Python multi-thread Port scanning tool. The level is limited. To tell the truth, there are some puzzles and puzzles in the middle, and the Code may also be mess

Python reference manual, python reference manual chmImportant built-in functions of expressions # Function # description ------------------------------------------------------------------------------------------------- abs (numbers) # returns the absolute value of A number apply (func [, arg [, kwargs]) # calls a given function, optional parameter all (iterable) # True is returned if all iterable elements

Python learning notes sorting (4) strings in Python..., python learning notes A string is an ordered Character Set combination used to store and present text-based information.Common string constants and expressionsT1 = ''empty stringT2 = "diege's" Double quotation marksT3 = "..." "Triple quotation marksT4 = R' \ temp \ diege 'raw string suppression (cancel) Esca

the built-in functions in the Python string (with code snippets) summarize a 1, find () detection string Usage format: str1.find (STR2) #在str1中 retrieves whether the string str2 exists, exists, returns the initial address of str2, does not exist, and returns -1. Str1.find (str2,x) #x是表示下标的变量, starting from the subscript x position to retrieve whether the str2 exists in str1. Str.find (str2,x,y) #y表示下标整型变量, meaning: Starting from subscr

Python learning-Python short tutorialPreface This tutorial combines Stanford CS231N and UC Berkerley CS188 Python tutorials.The tutorial is short, but it is suitable for children's shoes who have learned other languages based on certain programming basics.Start Python Interpreter P