readlines

问题 The python code: sku_specs = "./item_specs.txt" def item_specs(): g = open(sku_specs,"r") lines = g.readlines() lines = "<br />".join(lines) return lines f = open("ouput.txt","a") f.write("Some stuff"+item_specs()+"more stuff") f.write("more stuff") f.close() The extra characters that show up even if the file is "blank" are  When I open the file in Notepad++ and "show all symobls" I still get these BOM characters when the .txt file appears to be blank. Related: How do I remove  from the

问题 I have a text file with columns of data and I need to turn these columns into individual lists or arrays. This is what I have so far f = open('data.txt', 'r') temp = [] for row in f.readlines(): Data = row.split() temp.append(float(Data[0])) When I run this I get IndexError: list index out of range . Snippet of the data below: 16 0.2000 17 0.3000 18 0.4000 20 0.5000 21 0.6000 22 0.7000 24 0.8000 25 0.9000 26 1.000 I need the first column, if possible to look like this: Data = [16, 17, 18, 20,

问题 input.txt - I am Hungry call the shopping mall connected drive I want to read the input.txt line by line and send that as a request to the server and later save the response respectively. how to read and write the data line by line ? my code below works for just one input within input.txt (ex : I am Hungry). Can you please help me how to do it for multiple input ? Request : fileInput = os.path.join(scriptPath, "input.txt") if not os.path.exists(fileInput): print "error message" Error_Status =

问题 I am doing a small program to help me with learning Python (which I am very new to). I'm using Python 3.2. In the Python shell, when I enter f = open('filename.txt', 'r') f.readlines() it prints everything in the filename.txt . However, when I type it in a new window and save it with the .py extension, it does not show any output when I run it. It also does not give me any errors. The code looks somewhat like this: f = open('filename.txt', 'r') f.readlines() while True: f = open('filename.txt

问题 The file will not fit into memory. It is over 100GB and I want to access specific lines by line number. I do not want to count line by line until I reach it. I have read http://docstore.mik.ua/orelly/perl/cookbook/ch08_09.htm When I built an index using the following methods, the line return works up to a certain point. Once the line number is very large, the line being returned is the same. When I go to the specific line in the file the same line is returned. It seems to work for line

问题 I am wanting to create a single dataframe from the following website: http://www.arrs.net/MaraList/ML_2014.htm Unfortunately I am not sure how to take what seem to be tab delimiters and create columns of data. The code I have below takes and creates multiple character strings but I'm having trouble determining how to separate names that have multiple words into a single column as it is shown on the site. library(XML) url<-"http://www.arrs.net/MaraList/ML_2014.htm" data<-readLines(url) data<

问题 i have a file that has a specific line of interest (say, line 12) that looks like this: conform: 244216 (packets) exceed: 267093 (packets) i've written a script to pull the first number via regex and dump the value into a new file: getexceeds = open("file1.txt", "r").readlines()[12] output = re.search(r"\d+", getexceeds).group(0) with open("file2.txt", "w") as outp: outp.write(output) i am not quite good enough yet to return the second number in that line into a new file -- can anyone suggest

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . This is my first ever question here and I'm new to R, trying to figure out my first step in how to do data processing, please keep it easy : ) I'm wondering what would be the best function and a useful data structure in R to load unstructured text data for further processing. For

问题 I've read in "Dive into Python 3" that "The readlines() method now returns an iterator, so it is just as efficient as xreadlines() was in Python 2". See here: http://diveintopython3.org/porting-code-to-python-3-with-2to3.html . I'm not sure that it's true because they don't mention it here: http://docs.python.org/release/3.0.1/whatsnew/3.0.html . How can I check that? 回答1: Like this: Python 3.1.2 (r312:79149, Mar 21 2010, 00:41:52) [MSC v.1500 32 bit (Intel)] on win32 Type "help", "copyright"

问题 I have a text file that has the following data: 5298 10036 4 360 8 6128 11947 2 385 7 9472 18930 0 233 4 5056 9790 1 293 6 I read this file using the following code: file1 = open("test.txt","r") lines = file1.readlines() BF=[map(float, line.split()) for line in lines] This gives me the following error: could not convert string to float: ÿþ5 Why do I see this error? Update: print lines shows: ['\xff\xfe5\x002\x009\x008\x00\t\x001\x000\x000\x003\x006\x00\t\x004\x00\t\x003\x006\x000\x00\t\x008