File input to `parse` method gives TypeError: object of type '_io.TextIOWrapper' has no len() about lark HOT 5 CLOSED

I don't know where @erezsh got that from, Lark has never supported passing in a file object (or any IOStream) to .parse. This is also quite hard to add since we are using re, which can't deal with those objects directly, I can try to add support for it.

Ofcourse, if the file is smaller than a few MB, just loading it into memory is the better choice for speed.

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@erezsh showed that Lark's parse method takes a file argument so that Lark can read the file as it needs to.

I don't think that I did.

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@erezsh showed that Lark's parse method takes a file argument so that Lark can read the file as it needs to.

I don't think that I did.

You did, the quote is exactly what you wrote.

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@iainelder My bad, I was wrong, and I apologize for misleading you. You should read the file yourself, and provide it to Lark as a string.

If you need to parse a very large file, there might be a way to do so incrementally, but a solution isn't yet written or tested. See #1211 .

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If the file is smaller than a few MB, just loading it into memory is the better choice for speed.

My data is small enough that I can work like this.

Thanks for clarifying. The documentation does show that parse expects a string, but that issue ranks high on Google :-)

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