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lines changed Original file line number Diff line number Diff line change @@ -166,9 +166,9 @@ High-level interface
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The second argument, if present, specifies the file location to copy to (if
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absent, the location will be a tempfile with a generated name). The third
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- argument, if present, is a hook function that will be called once on
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+ argument, if present, is a callable that will be called once on
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establishment of the network connection and once after each block read
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- thereafter. The hook will be passed three arguments; a count of blocks
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+ thereafter. The callable will be passed three arguments; a count of blocks
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transferred so far, a block size in bytes, and the total size of the file. The
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third argument may be ``-1 `` on older FTP servers which do not return a file
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size in response to a retrieval request.
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