在Python中逐行读取.txt文件
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Read .txt file line by line in Python
提问by Philip McQuitty
My .txt file looks like this:
我的 .txt 文件如下所示：
![enter image description here][1]
![在此处输入图像描述][1]
How can I read my txt file into a string object that can be printed in the same format as above?
如何将我的 txt 文件读入可以以与上述相同格式打印的字符串对象中？
I have tried:
with open ("/Users/it/Desktop/Classbook/masterClassList.txt", "r") as myfile:
data = myfile.read()
for item in data:
print item
This code prints every character on a new line. I need the txt file to be a string in order to call string methods, particularly 'string.startswith()'
此代码在新行上打印每个字符。我需要 txt 文件是一个字符串才能调用字符串方法，特别是 'string.startswith()'
As you can see, in my IDE console, the lines are printing with a black line of spaces in between each line of content. How can I eliminate these blank lines?
如您所见，在我的 IDE 控制台中，每行内容之间都打印有黑色空格线。我怎样才能消除这些空行？
Here is my working solution:
这是我的工作解决方案：
with open ("/Users/it/Desktop/Classbook/masterClassList.txt", "r") as myfile:
data = myfile.read()
for line in data:
line.rstrip()
print data
采纳答案by Alex Martelli
Simplest might be:
最简单的可能是：
data = myfile.readlines()
This would work w/the rest of your code -- or, you could loop directly on myfile (insidethe with:-) and you'd be getting one line at a time. Note that lines include the ending \nso you may want to .strip()them before printing &c:-)
这将适用于您的其余代码 - 或者，您可以直接在 myfile 上循环（在 :- 内），with并且一次只能得到一行。请注意，行包括结尾，\n因此您可能需要.strip()在打印 &c 之前使用它们 :-)
回答by Dmitry Wojciechowski
The most memory efficient way of reading lines is:
读取行的最有效的内存方式是：
with open ("/Users/it/Desktop/Classbook/masterClassList.txt", "r") as myfile:
for line in myfile:
print line
i.e. you don't need to read the entire file in to a memory, only line by line. Here is the link to python tutorial: https://docs.python.org/2/tutorial/inputoutput.html#methods-of-file-objects
即您不需要将整个文件读入内存，只需一行一行。这是 python 教程的链接：https: //docs.python.org/2/tutorial/inputoutput.html#methods-of-file-objects
