How to check whether a file is empty or not?
check if file is empty - unix
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I have a text file. How can I check whether it's empty or not?
>>> import os >>> os.stat("file").st_size == 0 True
How to check if a file is empty in Bash?, Misspellings are irritating, aren't they? Check your spelling of empty , but then also try this: #!/bin/bash -e if [ -s diff.txt ] then rm -f empty.txt touch Since you have not defined what an empty file is. Some might consider a file with just blank lines also an empty file. So if you want to check if your file contains only blank lines (any whitespace character, '\r', ' ', '\t'), you can follow the example below: Python3
import os os.path.getsize(fullpathhere) > 0
How, in a script, can I determine if a file is currently being written to by, How do you check if a file is empty or not? It is good to test that the given file exits or is not empty. This will safe your script from throwing errors. This article will help you to test if the file exists or not and the file is empty or not. 1. Check if File Empty or Not. This script will check if given file is empty or not.
stat() will throw an exception if the file does not exist. This function will return True/False without throwing (simpler but less robust):
import os def is_non_zero_file(fpath): return os.path.isfile(fpath) and os.path.getsize(fpath) > 0
Find all (non-)empty files in a directory, How do you check whether a file is empty or not in Java? How can I check whether the file is empty or not empty? Answers: >>> import os >>> os.stat("file").st_size == 0 True Questions: Answers: import os os.path.getsize(fullpathhere) > 0 Questions: Answers: Both getsize() and stat() will throw an exception if the file does not exist.
if for some reason you already had the file open you could try this:
>>> with open('New Text Document.txt') as my_file: ... # I already have file open at this point.. now what? ... my_file.seek(0) #ensure you're at the start of the file.. ... first_char = my_file.read(1) #get the first character ... if not first_char: ... print "file is empty" #first character is the empty string.. ... else: ... my_file.seek(0) #first character wasn't empty, return to start of file. ... #use file now ... file is empty
Bash Script to Check If File is Empty or Not – TecAdmin, How do you check if a file is still being written in Unix? Empty File check using – IDCAMS //EMPTYCHK EXEC PGM=IDCAMS //INPUT DD DSN=XXXXXXX.INFILE,DISP=SHR //SYSPRINT DD SYSOUT=* //SYSIN DD * PRINT INFILE(INPUT) CHARACTER COUNT(1) /* If the input file is empty, then this step will give RC = 4. If the input file is not empty, then this step will give RC = 0.
Ok so I'll combine ghostdog74's answer and the comments, just for fun.
>>> import os >>> os.stat('c:/pagefile.sys').st_size==0 False
False means a non-empty file.
So let's write a function:
import os def file_is_empty(path): return os.stat(path).st_size==0
check if file is empty, is open, this command will return status 0, otherwise it will return 256 (1). count from(indd) empty /* if the file is empty , it will set rc=12 with idcams //indd dd dsn=input file,disp=shr //outdd dd dsn=output file,disp=shr //sysin dd * repro infile(indd) outfile(outdd) count(1) /* if the file is empty it will set rc=04
A Simple Example to Check if File is Empty in Java, It is good to test that the given file exits or is not empty. This will safe your script from throwing errors. This article will help you to test if the file While the other answers are correct, using the "-s" option will also show the file is empty even if the file does not exist. By adding this additional check "-f" to see if the file exists first, we ensure the result is correct.
Python: Three ways to check if a file is empty – thispointer.com, How do I check if a file is empty in a sh script I want to test in my shell script if the an exit status of 1 indicates that the FILE is empty or the file does not exist. If it reaches the end of file, it returns eof(). Ergo, we just peek() at the stream and see if it's eof(), since an empty file has nothing to peek at. Note, this also returns true if the file never opened in the first place, which should work in your case. If you don't want that:
Check if File Exists AND is not Empty, The common approach for checking if a file is empty or not is to first check if the file exists or not and then check if it contains any content, but Java has done that I have an output file from a previous step and I need to run "something" in the next step to check if the file is empty. If the file is empty, then the job script should finish EOJ. If the file is not empty then the job script should abend.
stat.ST_SIZEinstead of 6
- that's fine too. but i don't want to import stat. Its short and sweet enough and the size position in the returned list is not going to change anytime soon.
- @wRAR: os.stat('file').st_size is even better
- Note that the file types work for json, too. Sometimes, json.load() for empty file doesn't work and this provides a good way to handle that case
- For safety you may need to catch
OSErrorand return False.
- What is the difference/advantage using this vs os.state('file').st_size?
- Looks like the two are the same under the hood: stackoverflow.com/a/18962257/1397061
- Definitely like using
- There is a race condition because the file may be removed between the calls to
os.path.getsize(fpath), in which case the proposed function will raise an exception.
- Better to try and catch the
OSErrorinstead, like proposed in another comment.
- Also need to catch
TypeErrorwhich will be raised in the event that the input fpath is
- This answer is should have more votes because it actually checks whether the file has any contents at all.
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