Python 将目录路径作为用户输入的正确方法是什么？
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What is the proper way to take a directory path as user input?
提问by mrokeowo
Below is a snippet of code I am trying to use to take a directory path as "raw input" from the user. I receive the following error after the input is taken from the user:
下面是一段代码，我试图用来将目录路径作为用户的“原始输入”。从用户那里获取输入后，我收到以下错误：
Traceback (most recent call last):
File "C:\Users\larece.johnson\Desktop\Python Programs\Hello World 2", line 14, in <module>
f = open(str,"r+") #I open the text file here which the user gave me
IOError: [Errno 2] No such file or directory: 'C:/Users/larece.johnson/Desktop/Python Programs/BostonLog.log.2014-04-01'
Ignoring what I have done below, is there a particular way I am supposed to take the path from user so that Python accepts it?
忽略我在下面所做的，是否有一种特殊的方式我应该从用户那里获取路径，以便 Python 接受它？
For example, the directory and file I'm looking for is
例如，我正在寻找的目录和文件是
C:/Users/larece.johnson/Desktop/Python Programs/BostonLog.log.2014-04-01
import re #this library is used so that I can use the "search" function
import os #this is needed for using directory paths and manipulating them
str ="" #initializing string variable for raw data input
#print os.getcwd()
#f = open("C:/Users/larece.johnson/Desktop/BostonLog.log.2014-04-02.log","r+")
str = raw_input("Enter the name of your text file - please use / backslash when typing in directory path: "); #User will enter the name of text file for me
f = open(str,"r+")
采纳答案by tipanverella
I think you should try something like:
我认为你应该尝试这样的事情：
import sys
import os
user_input = raw_input("Enter the path of your file: ")
assert os.path.exists(user_input), "I did not find the file at, "+str(user_input)
f = open(user_input,'r+')
print("Hooray we found your file!")
#stuff you do with the file goes here
f.close()
回答by Kei Minagawa
It seems you want to check if the directory exists.
您似乎想检查目录是否存在。
If so, see os.path.isdir.
如果是这样，请参阅os.path.isdir。
os.path.isdir(path)
Return True if path is an existing directory.
This follows symbolic links, so both islink()
and isdir() can be true for the same path.
You can do like this:
你可以这样做：
s = raw_input();
if os.path.isdir(s):
f = open(s, "r+")
else:
print "Directory not exists."
回答by mrokeowo
I figured it out... I forgot to add the file extension at the end of the file name on my directory path; I did not notice that I was cutting it off by just copying/pasting the name of my file.... the program works now... thank you all!
我想通了......我忘记在我的目录路径上的文件名末尾添加文件扩展名；我没有注意到我只是通过复制/粘贴我的文件名来切断它......该程序现在可以运行......谢谢大家！
