decompress csv files

build_database.py

@@ -31,21 +31,48 @@ async def main():
             parsed = urlparse(url)
             parsed_path = Path(parsed.path)
             output_path = Path.cwd() / parsed_path.name
-            if not output_path.exists():
+            if output_path.exists():
+                log.info("file %s already exists, ignoring", output_path)
+                continue
+
             log.info("downloading %r into %s", url, output_path)
             async with ctx.session.get(url) as resp:
                 assert resp.status == 200
 
+                total_length = int(resp.headers["content-length"])
+                downloaded_bytes = 0
+                download_ratio = 0
+
+                log.info("to download %d bytes", total_length)
+
                 with tempfile.TemporaryFile() as temp_fd:
                     async for chunk in resp.content.iter_chunked(8192):
                         temp_fd.write(chunk)
+                        downloaded_bytes += len(chunk)
+                        new_download_ratio = round(
+                            (downloaded_bytes / total_length) * 100
+                        )
+                        if new_download_ratio != download_ratio:
+                            log.info("download at %d%%", download_ratio)
+                            download_ratio = new_download_ratio
 
                     # write to output
                     log.info("copying temp to output")
                     with output_path.open(mode="wb") as output_fd:
                         shutil.copyfileobj(temp_fd, output_fd)
-            else:
-                log.info("file %s already exists, ignoring", output_path)
+
+        # decompress
+        for url in urls:
+            parsed = urlparse(url)
+            parsed_path = Path(parsed.path)
+            input_path = Path.cwd() / parsed_path.name
+            original_name, original_extension, _gz = parsed_path.name.split(".")
+            output_path = Path.cwd() / f"{original_name}.{original_extension}"
+            if output_path.exists():
+                continue
+            with gzip.open(input_path, "rb") as in_fd:
+                with output_path.open(mode="wb") as out_fd:
+                    shutil.copyfileobj(in_fd, out_fd)
 
         # now that everythings downloaded, compile the db