代码编织梦想

def main():

fh = open('lines.txt')

for line in fh.readlines():

print(line)

if __name__ == "__main__": main()

Directory files

I am on for-working.py file, and am trying to access the lines.txt file within the same working directory. But I get error

No such file or directory: 'lines.txt'

Does python need to have an absolute path when opening files?

why doesn't this relative path work here?

Running python 3.6

EDIT ^1 I'm running visualstudio code with the python package extension by Don Jayamanne, and "Code Runner" package to compile/execute python code

EDIT ^2 Full error:

Traceback (most recent call last):

File "c:\www\Ex_Files_Python_3_EssT(1)\Ex_Files_Python_3_EssT\Exercise Files\07 Loops\for-working.py", line 11, in

if __name__ == "__main__": main()

File "c:\www\Ex_Files_Python_3_EssT(1)\Ex_Files_Python_3_EssT\Exercise Files\07 Loops\for-working.py", line 7, in main

fh = open('lines.txt', 'r')

FileNotFoundError: [Errno 2] No such file or directory: 'lines.txt'

EDIT ^3 checking sys.path

import sys

print(sys.path)

produces this information:

['c:\\www\\Ex_Files_Python_3_EssT(1)\\Ex_Files_Python_3_EssT\\Exercise Files\\07 Loops',

'C:\\Users\\Kagerjay\\AppData\\Local\\Programs\\Python\\Python36\\python36.zip', 'C:\\Users\\Kagerjay\\AppData\\Local\\Programs\\Python\\Python36\\DLLs', 'C:\\Users\\Kagerjay\\AppData\\Local\\Programs\\Python\\Python36\\lib', 'C:\\Users\\Kagerjay\\AppData\\Local\\Programs\\Python\\Python36', 'C:\\Users\\Kagerjay\\AppData\\Local\\Programs\\Python\\Python36\\lib\\site-packages']

EDIT ^4 checking os.getcwd()

Running

import os

print(os.getcwd())

Produces

c:\www\Ex_Files_Python_3_EssT(1)\Ex_Files_Python_3_EssT\Exercise Files

Well its definitely not in the right subdirectory (needs to cd 07 loops folder, that narrows the issue down

EDIT ^5 what is in lines.txt file

My lines.txt file i am opening looks like this. No extra whitespace or anything at start

01 This is a line of text

02 This is a line of text

03 This is a line of text

04 This is a line of text

05 This is a line of text

IN SUMMARY

Visual studio code's Code runner extension needs to be tweaked slightly to open files within a subdirectory so any of the below answers would provide a more robust solution to be independent of any extension / dependencies with the IDE

import os

print(os.getcwd())

Is most useful for diagnosing problem to the current directory python interpreter sees

解决方案

Get the directory of the file, and join it with the file you want to open:

def main():

dir_path = os.path.dirname(os.path.realpath(__file__))

lines = os.path.join(dir_path, "lines.txt")

fh = open(lines)

for line in fh.readlines():

print(line)

if __name__ == "__main__": main()

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