f.read空了 [英] f.read coming up empty

问题描述

我正在解释器中做所有这些事情.

I'm doing all this in the interpreter..

loc1 = '/council/council1'
file1 = open(loc1, 'r')

这时我可以执行file1.read()，它将文件的内容作为字符串打印到标准输出中

at this point i can do file1.read() and it prints the file's contents as a string to standard output

但是如果我添加这个..

but if i add this..

string1 = file1.read()

字符串1恢复为空..我不知道我可能做错了什么.这似乎是最基本的东西！

string 1 comes back empty.. i have no idea what i could be doing wrong. this seems like the most basic thing!

如果我再次输入file1.read()，则标准输出的输出只是一个空字符串.所以，当我尝试使用file1.read()

if I go on to type file1.read() again, the output to standard output is just an empty string. so, somehow i am losing my file when i try to create a string with file1.read()

推荐答案

您只能读取一次文件.之后，当前的读取位置位于文件的末尾.

You can only read a file once. After that, the current read-position is at the end of the file.

如果在重新阅读前添加file1.seek(0)，则应该能够再次阅读其中的内容.但是，一种更好的方法是，第一次读取一个字符串，然后将其保留在内存中:

If you add file1.seek(0) before you re-read it, you should be able to read the contents again. A better approach, however, is to read into a string the first time and then keep it in memory:

loc1 = '/council/council1'
file1 = open(loc1, 'r')
string1 = file1.read()
print string1

这篇关于f.read空了的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！