# Does CSV.read() block the file? IS there XLSX.close(), since XLSX.Open() exist
**URL:** https://discourse.julialang.org/t/does-csv-read-block-the-file-is-there-xlsx-close-since-xlsx-open-exist/28484
**Category:** New to Julia
**Created:** [September 6, 2019, 9:26pm UTC](https://discourse.julialang.org/t/does-csv-read-block-the-file-is-there-xlsx-close-since-xlsx-open-exist/28484 "2019-09-06T21:26:35Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@BMval](https://discourse.julialang.org/u/BMval)
#### Post date: [September 6, 2019, 9:26pm UTC](https://discourse.julialang.org/t/does-csv-read-block-the-file-is-there-xlsx-close-since-xlsx-open-exist/28484/1 "2019-09-06T21:26:35Z")
Does CSV.read() block the file?
It seems that yes? how to unblock?
The same question about XLSX.open()
Thank you in advance.
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### Author:  [@kevbonham](https://discourse.julialang.org/u/kevbonham)
#### Post date: [September 6, 2019, 11:40pm UTC](https://discourse.julialang.org/t/does-csv-read-block-the-file-is-there-xlsx-close-since-xlsx-open-exist/28484/2 "2019-09-06T23:40:21Z")
`CSV.read()` just goes to the end of the file and then releases it, so there’s no need to close it.
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### Author:  [@felipenoris](https://discourse.julialang.org/u/felipenoris)
#### Post date: [September 8, 2019, 5:55pm UTC](https://discourse.julialang.org/t/does-csv-read-block-the-file-is-there-xlsx-close-since-xlsx-open-exist/28484/3 "2019-09-08T17:55:28Z")
Currently, XLSX openxlsx methods keep a stream opened until you use XLSX.close method.
The alternative is to use XLSX.readxlsx, which will read the entire file at once and close the stream before returning.