I have encountered a problem while trying to open a .txt file from the same directory where my source code is located.
When I tried to open the file like this:
with open("pi_digits.txt") as file_object:
contents = file_object.read()
print(contents)
I failed.
I also failed when I typed the whole path:
with open("Users\lukas\Documents\python_work\chapter_10") as file_object:
contents = file_object.read()
print(contents)
But when I typed:
with open("\\Users\\lukas\\Documents\\python_work\\chapter_10\\pi_digits.txt") as file_object:
contents = file_object.read()
print(contents)
I succeeded!
So my question is: Why can't I run the code without error when I enter the following code:
with open('pi_digits.txt') as file_object:
contents = file_object.read()
print(contents)
Thank you for your answers and sorry if my question was not well constructed.
#Sottvogel
In general, a python instance can be run from many different directories in your computer. One way to check where the running instance is:
import os
os.getcwd()
If you confirm that you are in the same directory of your file, try and see
what the following returns:
os.listdir()
In case your file doesn't appear in the returned string, then there has to be another problem. Make sure you checkout the docs as well.
Hope it helps!
the thing with paths is python is that they are referenced from where you launch the program (current working directory), not from where the file lives. So, I recommend making use of the os and pathlib packages to manage file paths properly.
Why can't I run the code without error when I enter the following code:
It depends from where you execute your python code.
Building on above, where you execute your code implies wether you need to use the file name or it's path.
If you execute your Python code in the same directory as the txt file, then you can use the file's name. However, if it is located elsewhere the script will need to access the file and hence, requires the path to it.
Related
I am quite new to working with Python files, and having a small issue. I am simply trying to print the name of a text file and its 'mode'.
Here is my code:
f = open('test.txt','r')
print(f.name)
print(f.mode)
f.close()
I have a saved a text file called 'test.txt' in the same directory as where I wrote the above code.
However, when I run the code, I get the following file not found error:
FileNotFoundError: [Errno 2] No such file or directory: 'test.txt'
Any ideas what is causing this?
I have also tried to replace the first argument above with the path of the test.txt file, but I get the same error?
open (on pretty much any operating system) doesn't care where your program lies, but from which directory you are running it. (This is not specific to python, but how file operations work, and what a current working directory is.)
So, this is expected. You need to run python from the directory that test.txt is in.
I have also tried to replace the first argument above with the path of the test.txt file, but I get the same error?
In that case, you must have mistyped the path. Make sure there's no special characters (like backslashes) that python interprets specially in there, or use the raw string format r'...' instead of just '...'.
It depend from where the python command is launched for instance :
let suppose we have this 2 files :
dir1/dir2/code.py <- your code
dir1/dir2/test.txt
if you run your python commande from the dir1 directory it will not work because it will search for dir1/test.txt
you need to run the python commande from the same directory(dir2 in the example).
This question already has answers here:
open() gives FileNotFoundError / IOError: '[Errno 2] No such file or directory'
(8 answers)
Closed 7 months ago.
I'm trying to write a simple program to read a file and search for a word then print how many times that word is found in the file. Every time I type in "test.rtf" (which is the name of my document) I get this error:
Traceback (most recent call last):
File "/Users/AshleyStallings/Documents/School Work/Computer Programming/Side Projects/How many? (Python).py", line 9, in <module>
fileScan= open(fileName, 'r') #Opens file
FileNotFoundError: [Errno 2] No such file or directory: 'test.rtf'
In class last semester, I remember my professor saying you have to save the file in a specific place? I'm not sure if he really said that though, but I'm running apple OSx if that helps.
Here's the important part of my code:
fileName= input("Please enter the name of the file you'd like to use.")
fileScan= open(fileName, 'r') #Opens file
If the user does not pass the full path to the file (on Unix type systems this means a path that starts with a slash), the path is interpreted relatively to the current working directory. The current working directory usually is the directory in which you started the program. In your case, the file test.rtf must be in the same directory in which you execute the program.
You are obviously performing programming tasks in Python under Mac OS. There, I recommend to work in the terminal (on the command line), i.e. start the terminal, cd to the directory where your input file is located and start the Python script there using the command
$ python script.py
In order to make this work, the directory containing the python executable must be in the PATH, a so-called environment variable that contains directories that are automatically used for searching executables when you enter a command. You should make use of this, because it simplifies daily work greatly. That way, you can simply cd to the directory containing your Python script file and run it.
In any case, if your Python script file and your data input file are not in the same directory, you always have to specify either a relative path between them or you have to use an absolute path for one of them.
Is test.rtf located in the same directory you're in when you run this?
If not, you'll need to provide the full path to that file.
Suppose it's located in
/Users/AshleyStallings/Documents/School Work/Computer Programming/Side Projects/data
In that case you'd enter
data/test.rtf
as your file name
Or it could be in
/Users/AshleyStallings/Documents/School Work/Computer Programming/some_other_folder
In that case you'd enter
../some_other_folder/test.rtf
As noted above the problem is in specifying the path to your file.
The default path in OS X is your home directory (/Users/macbook represented by ~ in terminal ...you can change or rename the home directory with the advanced options in System Preferences > Users & Groups).
Or you can specify the path from the drive to your file in the filename:
path = "/Users/macbook/Documents/MyPython/"
myFile = path + fileName
You can also catch the File Not Found Error and give another response using try:
try:
with open(filename) as f:
sequences = pick_lines(f)
except FileNotFoundError:
print("File not found. Check the path variable and filename")
exit()
A good start would be validating the input. In other words, you can make sure that the user has indeed typed a correct path for a real existing file, like this:
import os
fileName = input("Please enter the name of the file you'd like to use.")
while not os.path.isfile(fileName):
fileName = input("Whoops! No such file! Please enter the name of the file you'd like to use.")
This is with a little help from the built in module os, That is a part of the Standard Python Library.
You might need to change your path by:
import os
path=os.chdir(str('Here_should_be_the_path_to_your_file')) #This command changes directory
This is what worked for me at least! Hope it works for you too!
Difficult to give code examples in the comments.
To read the words in the file, you can read the contents of the file, which gets you a string - this is what you were doing before, with the read() method - and then use split() to get the individual words.
Split breaks up a String on the delimiter provided, or on whitespace by default. For example,
"the quick brown fox".split()
produces
['the', 'quick', 'brown', 'fox']
Similarly,
fileScan.read().split()
will give you an array of Strings.
Hope that helps!
First check what's your file format(e.g: .txt, .json, .csv etc ),
If your file present in PWD , then just give the name of the file along with the file format inside either single('')or double("") quote and the appropriate operation mode as your requirement
e.g:
with open('test.txt','r') as f: data=f.readlines() for i in data: print(i)
If your file present in other directory, then just give the full path name where is your file is present and file name along with file format of the file inside either single('')or double("") quote and the appropriate operation mode as your requirement.
If it showing unicode error just put either r before quote of file path or else put '/' instead of ''
with open(r'C:\Users\soman\Desktop\test.txt','r') as f: data=f.readlines() for i in data: print(i)
The mistake I did was
my code :
x = open('python.txt')
print(x)
But the problem was in file directory ,I saved it as python.txt instead of just python .
So my file path was
->C:\Users\noob\Desktop\Python\Course 2\python.txt.txt
That is why it was giving a error.
Name your file without .txt it will run.
I don't know what's wrong here, all I'm trying to do is to open this file, but it says it can't find such a file or directory, however as I have highlighted on the side, the file is right there. I just want to open it. I have opened files before but never encountered this. I must have missed something, I checked online, and seems like my syntax is correct, but I don't know.
I get the same error when I try with "alphabetical_words" which is just a text file.
When open() function receives a relative path, it looks for that file relative to the current working directory. In other words: relative to the current directory from where the script is run. This can be any arbitrary location.
I guess what you want to do is look for alphabetical.csv file relative to the script location. To do that use the following formula:
from pathlib import Path
# Get directory of this script
THIS_DIR = Path(__file__).absolute().parent
# Get path of CSV file relative to the directory of this script
CSV_PATH = THIS_DIR.joinpath("alphabetical.csv")
# Open the CSV file using a with-block
with CSV_PATH.open(encoding="utf-8") as csvfile:
pass # Do stuff with opened file
You need to import csv. Then you can open the file as a csv file. For example,
with open ("alphabetical.csv", "r") as csvfile:
Then you can use the file.
Make sure the file is in your cwd.
I'm working my way through the python crash course pdf. Everything was going well until I hit chapter 10 "files and exceptions".
The task is very simple.
1) create a text file "pi_digits.txt" that contains the first 30 digits of pi.
2) run the following code:
with open('pi_digits.txt') as file_object:
contents = file_object.read()
print(contents)
I keep getting a filenotfounderror [errno 2].
I have tried using the full file path, placing the file in the same ~.atom folder that contains the package 'script'.
I tried to run the file through a terminal and got the same error message.
I also searched stackoverflow for solutions and did find similar problems but the answers did not work.
Any help would be appreciated.
Prepend this:
import os
print(os.getcwd())
os.chdir('/tmp')
and copy the .txt file to /tmp. Also, be sure the copied filename is all lowercase, to match your program.
This question already has answers here:
open() gives FileNotFoundError / IOError: '[Errno 2] No such file or directory'
(8 answers)
Closed 7 months ago.
I'm trying to write a simple program to read a file and search for a word then print how many times that word is found in the file. Every time I type in "test.rtf" (which is the name of my document) I get this error:
Traceback (most recent call last):
File "/Users/AshleyStallings/Documents/School Work/Computer Programming/Side Projects/How many? (Python).py", line 9, in <module>
fileScan= open(fileName, 'r') #Opens file
FileNotFoundError: [Errno 2] No such file or directory: 'test.rtf'
In class last semester, I remember my professor saying you have to save the file in a specific place? I'm not sure if he really said that though, but I'm running apple OSx if that helps.
Here's the important part of my code:
fileName= input("Please enter the name of the file you'd like to use.")
fileScan= open(fileName, 'r') #Opens file
If the user does not pass the full path to the file (on Unix type systems this means a path that starts with a slash), the path is interpreted relatively to the current working directory. The current working directory usually is the directory in which you started the program. In your case, the file test.rtf must be in the same directory in which you execute the program.
You are obviously performing programming tasks in Python under Mac OS. There, I recommend to work in the terminal (on the command line), i.e. start the terminal, cd to the directory where your input file is located and start the Python script there using the command
$ python script.py
In order to make this work, the directory containing the python executable must be in the PATH, a so-called environment variable that contains directories that are automatically used for searching executables when you enter a command. You should make use of this, because it simplifies daily work greatly. That way, you can simply cd to the directory containing your Python script file and run it.
In any case, if your Python script file and your data input file are not in the same directory, you always have to specify either a relative path between them or you have to use an absolute path for one of them.
Is test.rtf located in the same directory you're in when you run this?
If not, you'll need to provide the full path to that file.
Suppose it's located in
/Users/AshleyStallings/Documents/School Work/Computer Programming/Side Projects/data
In that case you'd enter
data/test.rtf
as your file name
Or it could be in
/Users/AshleyStallings/Documents/School Work/Computer Programming/some_other_folder
In that case you'd enter
../some_other_folder/test.rtf
As noted above the problem is in specifying the path to your file.
The default path in OS X is your home directory (/Users/macbook represented by ~ in terminal ...you can change or rename the home directory with the advanced options in System Preferences > Users & Groups).
Or you can specify the path from the drive to your file in the filename:
path = "/Users/macbook/Documents/MyPython/"
myFile = path + fileName
You can also catch the File Not Found Error and give another response using try:
try:
with open(filename) as f:
sequences = pick_lines(f)
except FileNotFoundError:
print("File not found. Check the path variable and filename")
exit()
A good start would be validating the input. In other words, you can make sure that the user has indeed typed a correct path for a real existing file, like this:
import os
fileName = input("Please enter the name of the file you'd like to use.")
while not os.path.isfile(fileName):
fileName = input("Whoops! No such file! Please enter the name of the file you'd like to use.")
This is with a little help from the built in module os, That is a part of the Standard Python Library.
You might need to change your path by:
import os
path=os.chdir(str('Here_should_be_the_path_to_your_file')) #This command changes directory
This is what worked for me at least! Hope it works for you too!
Difficult to give code examples in the comments.
To read the words in the file, you can read the contents of the file, which gets you a string - this is what you were doing before, with the read() method - and then use split() to get the individual words.
Split breaks up a String on the delimiter provided, or on whitespace by default. For example,
"the quick brown fox".split()
produces
['the', 'quick', 'brown', 'fox']
Similarly,
fileScan.read().split()
will give you an array of Strings.
Hope that helps!
First check what's your file format(e.g: .txt, .json, .csv etc ),
If your file present in PWD , then just give the name of the file along with the file format inside either single('')or double("") quote and the appropriate operation mode as your requirement
e.g:
with open('test.txt','r') as f: data=f.readlines() for i in data: print(i)
If your file present in other directory, then just give the full path name where is your file is present and file name along with file format of the file inside either single('')or double("") quote and the appropriate operation mode as your requirement.
If it showing unicode error just put either r before quote of file path or else put '/' instead of ''
with open(r'C:\Users\soman\Desktop\test.txt','r') as f: data=f.readlines() for i in data: print(i)
The mistake I did was
my code :
x = open('python.txt')
print(x)
But the problem was in file directory ,I saved it as python.txt instead of just python .
So my file path was
->C:\Users\noob\Desktop\Python\Course 2\python.txt.txt
That is why it was giving a error.
Name your file without .txt it will run.