How to use glob() output as input to os.listdir()
$begingroup$
I'm trying to use the output of glob.glob() as the input to os.listdir() in order to get the number of files in the directory. The output of glob() gives the following:
f = glob.glob(ct)
print(f)
['C:\Users\tennant\Desktop\RF WAVEFORMS\SPRING 2018\RF\1L22\2018_05_02\133258.2']
which, if I try to use as input to listdir() gives the following error
test = os.listdir(str(f))
Eventually through enough trial and error, I was able to find a solution.
f = glob.glob(ct)
fnew = str(f).strip('')
test = os.listdir(fnew.replace(''',""))
print(fnew.replace(''',""), len(test))
C:\Users\tennant\Desktop\RF WAVEFORMS\SPRING 2018\RF\1L22\2018_05_02\133258.2 7
However it's messy and I'm clearly not understanding something more fundamental about the output of glob() or strings in general. Anything that could clean this code up and help my understanding would be greatly appreciated!
python data
asked 2 days ago
Chris TennantChris Tennant
153
$endgroup$
add a comment |
$begingroup$
I'm trying to use the output of glob.glob() as the input to os.listdir() in order to get the number of files in the directory. The output of glob() gives the following:
f = glob.glob(ct)
print(f)
['C:\Users\tennant\Desktop\RF WAVEFORMS\SPRING 2018\RF\1L22\2018_05_02\133258.2']
which, if I try to use as input to listdir() gives the following error
test = os.listdir(str(f))
Eventually through enough trial and error, I was able to find a solution.
f = glob.glob(ct)
fnew = str(f).strip('')
test = os.listdir(fnew.replace(''',""))
print(fnew.replace(''',""), len(test))
C:\Users\tennant\Desktop\RF WAVEFORMS\SPRING 2018\RF\1L22\2018_05_02\133258.2 7
However it's messy and I'm clearly not understanding something more fundamental about the output of glob() or strings in general. Anything that could clean this code up and help my understanding would be greatly appreciated!
python data
asked 2 days ago
Chris TennantChris Tennant
153
$endgroup$
$begingroup$
fis a list (seehelp(glob.glob)). Instead of converting it to a string and then stripping the brackets, why don't you just get the element withf[0]? Have you triedos.listdir(f[0])?
$endgroup$
– mapto
2 days ago
$begingroup$
@mapto, thank you - this does work! Appreciate your feedback.
$endgroup$
– Chris Tennant
2 days ago
$begingroup$
What do you actually want to do? Just count the number of files in a directory? Yourglob.glob(ct)doesn't show you are doing any fancy filtering or anything. Or do you want to get the number of files in many directories?
$endgroup$
– n1k31t4
2 days ago
$begingroup$
@n1k31t4, yeah I just want to count files in a directory.ctis a string that contains wildcard characters.
$endgroup$
– Chris Tennant
yesterday
$begingroup$
@ChrisTennant - in that case, ifglobis already returning the filenames that you want (i.e. that match you wildcard expression) then you can simply use the length of the returned list:len(f). If it is the case that each element in the listfis a folder, and you want to count the number of files in each of those folders, then just loop overfafter performing the glob. I'll add an answer with example code.
$endgroup$
– n1k31t4
yesterday
add a comment |
$begingroup$
I'm trying to use the output of glob.glob() as the input to os.listdir() in order to get the number of files in the directory. The output of glob() gives the following:
f = glob.glob(ct)
print(f)
['C:\Users\tennant\Desktop\RF WAVEFORMS\SPRING 2018\RF\1L22\2018_05_02\133258.2']
which, if I try to use as input to listdir() gives the following error
test = os.listdir(str(f))
Eventually through enough trial and error, I was able to find a solution.
f = glob.glob(ct)
fnew = str(f).strip('')
test = os.listdir(fnew.replace(''',""))
print(fnew.replace(''',""), len(test))
C:\Users\tennant\Desktop\RF WAVEFORMS\SPRING 2018\RF\1L22\2018_05_02\133258.2 7
However it's messy and I'm clearly not understanding something more fundamental about the output of glob() or strings in general. Anything that could clean this code up and help my understanding would be greatly appreciated!
python data
asked 2 days ago
Chris TennantChris Tennant
153
$endgroup$
I'm trying to use the output of glob.glob() as the input to os.listdir() in order to get the number of files in the directory. The output of glob() gives the following:
f = glob.glob(ct)
print(f)
['C:\Users\tennant\Desktop\RF WAVEFORMS\SPRING 2018\RF\1L22\2018_05_02\133258.2']
which, if I try to use as input to listdir() gives the following error
test = os.listdir(str(f))
Eventually through enough trial and error, I was able to find a solution.
f = glob.glob(ct)
fnew = str(f).strip('')
test = os.listdir(fnew.replace(''',""))
print(fnew.replace(''',""), len(test))
C:\Users\tennant\Desktop\RF WAVEFORMS\SPRING 2018\RF\1L22\2018_05_02\133258.2 7
However it's messy and I'm clearly not understanding something more fundamental about the output of glob() or strings in general. Anything that could clean this code up and help my understanding would be greatly appreciated!
python data
python data
asked 2 days ago
Chris TennantChris Tennant
153
asked 2 days ago
Chris TennantChris Tennant
153
asked 2 days ago
Chris TennantChris Tennant
153
asked 2 days ago
Chris TennantChris Tennant
153
asked 2 days ago
Chris TennantChris Tennant
153
153
$begingroup$
fis a list (seehelp(glob.glob)). Instead of converting it to a string and then stripping the brackets, why don't you just get the element withf[0]? Have you triedos.listdir(f[0])?
$endgroup$
– mapto
2 days ago
$begingroup$
@mapto, thank you - this does work! Appreciate your feedback.
$endgroup$
– Chris Tennant
2 days ago
$begingroup$
What do you actually want to do? Just count the number of files in a directory? Yourglob.glob(ct)doesn't show you are doing any fancy filtering or anything. Or do you want to get the number of files in many directories?
$endgroup$
– n1k31t4
2 days ago
$begingroup$
@n1k31t4, yeah I just want to count files in a directory.ctis a string that contains wildcard characters.
$endgroup$
– Chris Tennant
yesterday
$begingroup$
@ChrisTennant - in that case, ifglobis already returning the filenames that you want (i.e. that match you wildcard expression) then you can simply use the length of the returned list:len(f). If it is the case that each element in the listfis a folder, and you want to count the number of files in each of those folders, then just loop overfafter performing the glob. I'll add an answer with example code.
$endgroup$
– n1k31t4
yesterday
add a comment |
$begingroup$
fis a list (seehelp(glob.glob)). Instead of converting it to a string and then stripping the brackets, why don't you just get the element withf[0]? Have you triedos.listdir(f[0])?
$endgroup$
– mapto
2 days ago
$begingroup$
@mapto, thank you - this does work! Appreciate your feedback.
$endgroup$
– Chris Tennant
2 days ago
$begingroup$
What do you actually want to do? Just count the number of files in a directory? Yourglob.glob(ct)doesn't show you are doing any fancy filtering or anything. Or do you want to get the number of files in many directories?
$endgroup$
– n1k31t4
2 days ago
$begingroup$
@n1k31t4, yeah I just want to count files in a directory.ctis a string that contains wildcard characters.
$endgroup$
– Chris Tennant
yesterday
$begingroup$
@ChrisTennant - in that case, ifglobis already returning the filenames that you want (i.e. that match you wildcard expression) then you can simply use the length of the returned list:len(f). If it is the case that each element in the listfis a folder, and you want to count the number of files in each of those folders, then just loop overfafter performing the glob. I'll add an answer with example code.
$endgroup$
– n1k31t4
yesterday
$begingroup$
f is a list (see help(glob.glob)). Instead of converting it to a string and then stripping the brackets, why don't you just get the element with f[0]? Have you tried os.listdir(f[0])?$endgroup$
– mapto
2 days ago
$begingroup$
f is a list (see help(glob.glob)). Instead of converting it to a string and then stripping the brackets, why don't you just get the element with f[0]? Have you tried os.listdir(f[0])?$endgroup$
– mapto
2 days ago
$begingroup$
@mapto, thank you - this does work! Appreciate your feedback.
$endgroup$
– Chris Tennant
2 days ago
$begingroup$
@mapto, thank you - this does work! Appreciate your feedback.
$endgroup$
– Chris Tennant
2 days ago
$begingroup$
What do you actually want to do? Just count the number of files in a directory? Your
glob.glob(ct) doesn't show you are doing any fancy filtering or anything. Or do you want to get the number of files in many directories?$endgroup$
– n1k31t4
2 days ago
$begingroup$
What do you actually want to do? Just count the number of files in a directory? Your
glob.glob(ct) doesn't show you are doing any fancy filtering or anything. Or do you want to get the number of files in many directories?$endgroup$
– n1k31t4
2 days ago
$begingroup$
@n1k31t4, yeah I just want to count files in a directory.
ct is a string that contains wildcard characters.$endgroup$
– Chris Tennant
yesterday
$begingroup$
@n1k31t4, yeah I just want to count files in a directory.
ct is a string that contains wildcard characters.$endgroup$
– Chris Tennant
yesterday
$begingroup$
@ChrisTennant - in that case, if
glob is already returning the filenames that you want (i.e. that match you wildcard expression) then you can simply use the length of the returned list: len(f). If it is the case that each element in the list f is a folder, and you want to count the number of files in each of those folders, then just loop over f after performing the glob. I'll add an answer with example code.$endgroup$
– n1k31t4
yesterday
$begingroup$
@ChrisTennant - in that case, if
glob is already returning the filenames that you want (i.e. that match you wildcard expression) then you can simply use the length of the returned list: len(f). If it is the case that each element in the list f is a folder, and you want to count the number of files in each of those folders, then just loop over f after performing the glob. I'll add an answer with example code.$endgroup$
– n1k31t4
yesterday
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
Assuming you have a string to pass into glob that does wildcard matching, glob will return a list of matches. So you don't need to make a string out of that list and replace the square-brackets and so on. You can just iterate over that list and do something with each of the values, which are already strings.
results = glob.glob(your_pattern)
Based on your code, the results is actually a list of folder names for which you want to count the number of files in each. We can loop over results and print the counts:
for folder in results:
n = len(os.listdir(folder))
print("Folder: {0} --> t {1} files".format(folder, n)
answered yesterday
n1k31t4n1k31t4
6,3712319
$endgroup$
$begingroup$
Thanks @n1k31t4, this does exactly what I want. Much appreciated!
$endgroup$
– Chris Tennant
3 hours ago
add a comment |
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1 Answer
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$begingroup$
Assuming you have a string to pass into glob that does wildcard matching, glob will return a list of matches. So you don't need to make a string out of that list and replace the square-brackets and so on. You can just iterate over that list and do something with each of the values, which are already strings.
results = glob.glob(your_pattern)
Based on your code, the results is actually a list of folder names for which you want to count the number of files in each. We can loop over results and print the counts:
for folder in results:
n = len(os.listdir(folder))
print("Folder: {0} --> t {1} files".format(folder, n)
answered yesterday
n1k31t4n1k31t4
6,3712319
$endgroup$
$begingroup$
Thanks @n1k31t4, this does exactly what I want. Much appreciated!
$endgroup$
– Chris Tennant
3 hours ago
add a comment |
$begingroup$
Assuming you have a string to pass into glob that does wildcard matching, glob will return a list of matches. So you don't need to make a string out of that list and replace the square-brackets and so on. You can just iterate over that list and do something with each of the values, which are already strings.
results = glob.glob(your_pattern)
Based on your code, the results is actually a list of folder names for which you want to count the number of files in each. We can loop over results and print the counts:
for folder in results:
n = len(os.listdir(folder))
print("Folder: {0} --> t {1} files".format(folder, n)
answered yesterday
n1k31t4n1k31t4
6,3712319
$endgroup$
$begingroup$
Thanks @n1k31t4, this does exactly what I want. Much appreciated!
$endgroup$
– Chris Tennant
3 hours ago
add a comment |
$begingroup$
Assuming you have a string to pass into glob that does wildcard matching, glob will return a list of matches. So you don't need to make a string out of that list and replace the square-brackets and so on. You can just iterate over that list and do something with each of the values, which are already strings.
results = glob.glob(your_pattern)
Based on your code, the results is actually a list of folder names for which you want to count the number of files in each. We can loop over results and print the counts:
for folder in results:
n = len(os.listdir(folder))
print("Folder: {0} --> t {1} files".format(folder, n)
answered yesterday
n1k31t4n1k31t4
6,3712319
$endgroup$
Assuming you have a string to pass into glob that does wildcard matching, glob will return a list of matches. So you don't need to make a string out of that list and replace the square-brackets and so on. You can just iterate over that list and do something with each of the values, which are already strings.
results = glob.glob(your_pattern)
Based on your code, the results is actually a list of folder names for which you want to count the number of files in each. We can loop over results and print the counts:
for folder in results:
n = len(os.listdir(folder))
print("Folder: {0} --> t {1} files".format(folder, n)
answered yesterday
n1k31t4n1k31t4
6,3712319
answered yesterday
n1k31t4n1k31t4
6,3712319
answered yesterday
n1k31t4n1k31t4
6,3712319
answered yesterday
n1k31t4n1k31t4
6,3712319
6,3712319
$begingroup$
Thanks @n1k31t4, this does exactly what I want. Much appreciated!
$endgroup$
– Chris Tennant
3 hours ago
add a comment |
$begingroup$
Thanks @n1k31t4, this does exactly what I want. Much appreciated!
$endgroup$
– Chris Tennant
3 hours ago
$begingroup$
Thanks @n1k31t4, this does exactly what I want. Much appreciated!
$endgroup$
– Chris Tennant
3 hours ago
$begingroup$
Thanks @n1k31t4, this does exactly what I want. Much appreciated!
$endgroup$
– Chris Tennant
3 hours ago
add a comment |
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$begingroup$
fis a list (seehelp(glob.glob)). Instead of converting it to a string and then stripping the brackets, why don't you just get the element withf[0]? Have you triedos.listdir(f[0])?$endgroup$
– mapto
2 days ago
$begingroup$
@mapto, thank you - this does work! Appreciate your feedback.
$endgroup$
– Chris Tennant
2 days ago
$begingroup$
What do you actually want to do? Just count the number of files in a directory? Your
glob.glob(ct)doesn't show you are doing any fancy filtering or anything. Or do you want to get the number of files in many directories?$endgroup$
– n1k31t4
2 days ago
$begingroup$
@n1k31t4, yeah I just want to count files in a directory.
ctis a string that contains wildcard characters.$endgroup$
– Chris Tennant
yesterday
$begingroup$
@ChrisTennant - in that case, if
globis already returning the filenames that you want (i.e. that match you wildcard expression) then you can simply use the length of the returned list:len(f). If it is the case that each element in the listfis a folder, and you want to count the number of files in each of those folders, then just loop overfafter performing the glob. I'll add an answer with example code.$endgroup$
– n1k31t4
yesterday