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问题 I need to know if the letter b (both uppercase and lowercase preferably) consist in a list. My code: List1=['apple', 'banana', 'Baboon', 'Charlie'] if 'b' in List1 or 'B' in List1: count_low = List1.count('b') count_high = List1.count('B') count_total = count_low + count_high print "The letter b appears:", count_total, "times." else: print "it did not work" 回答1: You need to loop through your list and go through every item, like so: mycount = 0 for item in List1: mycount = mycount + item.lower

问题 In Python, you can do this: L=["John","David","Susan"] x = "John" if x in L: print(L.index(x)) What if I have a list like this: L = [["John", 1234, "California"], ["David", 5678, "Arizona"], ["Susan", 8765, "Nevada"]] and I want to do a search of name "John" and find out the State and ID number without iterating over all the elements of the list? What I looking for is if there's something similar to "if {something} in L". I guess it will be like a record search function. I have a list of

问题 I'm making a simple python search program for my computer and I was wondering how I would get it to scan the entire C Drive to search for a file, instead of the file being in the same folder as the target file? This is what I have so far. import os print('What song would you like to listen to?') choice = input().title() os.startfile(choice + '.mp3') 回答1: If you have a root directory to search within, you can use os.walk. It will yield triples of directory paths, directories within that

问题 I have a classifieds website... When users post a new classified, it is automatically added to a dynamic sitemap (xml). The sitemaps are submitted to google about two months ago, via Webmaster Tools. Although some classifieds are indexed, it takes way too long for Google to index these. How does Google decide which sitemaps to index right away? One example is Stackoverflow questions; They show up in SERP:s almost directly. Is there anything I can do to make Google index and display my

问题 I have a classifieds website... When users post a new classified, it is automatically added to a dynamic sitemap (xml). The sitemaps are submitted to google about two months ago, via Webmaster Tools. Although some classifieds are indexed, it takes way too long for Google to index these. How does Google decide which sitemaps to index right away? One example is Stackoverflow questions; They show up in SERP:s almost directly. Is there anything I can do to make Google index and display my

问题 I'm trying to add search functionality to a map I'm generating in Python with Folium. I see there is a handy Search plugin available and able to implement it successfully and get it added to the map. Unfortunately, using a FeatureGroup as the layer my FeatureGroup filled with markers can't seem to get the search to bring back results. My assumption is that the search function would query the tooltip and/or popup attributes of the markers to return the lat/lon as the search value. I've tried

问题 Trying to implement the rails auto_complete plugin to help a user select tags that don't appear on the home page since there will be potentially hundreds of tags and only a small fraction can be displayed. The way my navigation works is like this: I start with a category show page that displays all articles within that category. When the user clicks a tag, that brings up a tag filter in the url like this: http://localhost:3000/categories/Stories?tag=scary This will show all articles in the

问题 Simple question: I need a solution so that I can find, lets say names, between A-F, INCLUDING all names that start with F. If you use BETWEEN or A >= value <= F you find out that it stops at F. So I am posting this for suggestions. NOTE: User will see 2 textboxes that accept a range user can type. The user refines how far to go in F boundary as such: User types in 'Fa' means the result should return: Fauder, Fail, Famber, ... etc I have currently 2 solutions but there's got a be a better way.

问题 I am working on a codebase which has some unicode encoded files scattered throughout as a result of multiple team members developing with different editors (and default settings). I would like to clean up our code base by finding all the unicode encoded files and converting them back to ANSI encoding. Any thoughts on how to accomplish the "finding" part of this task would be truly appreciated. 回答1: See “How to detect the character encoding of a text-file?” or “How to reliably guess the

问题 If we want to search a query like this "t1 t2 t3" (t1,t2 ,t3 must be queued) in an inverted index structure , which ways should we do ? 1-First we search the "t1" term and find all documents that contains "t1" , then do this work for "t2" and then "t3" . Then find documents that positions of "t1" , "t2" and "t3" are next to each other . 2-First we search the "t1" term and find all documents that contains "t1" , then in all documents that we found , we search the "t2" and next , in the result