Add trim and combine script

combine.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+# Combine (and shorten) parquet files into a single file
+
+import os, glob, sys, re
+import pandas as pd
+from merge_parquets import merge_parquet_dir
+
+MAX_LENGTH = 1000  # max length of question or answer
+
+for file in glob.glob("full/*.parquet"):
+    df = pd.read_parquet(file)
+    before = len(df)
+    df = df[df["INSTRUCTION"].str.len() < MAX_LENGTH]
+    df = df[df["RESPONSE"].str.len() < MAX_LENGTH]
+    df["METADATA"] = df["METADATA"].apply(
+        lambda meta: {
+            "tags": meta["tags"],
+            "answer_score": int(meta["answer_score"])
+            if "answer_score" in meta and meta["answer_score"]
+            else 0,
+            "question_score": int(meta["question_score"])
+            if "question_score" in meta and meta["question_score"]
+            else 0,
+        }
+    )
+    df.to_parquet(file)
+    after = len(df)
+    print(
+        f"Shortened {file} from {before} to {after} rows ({100 * after / before:.2f})"
+    )
+
+merge_parquet_dir("full", "stackexchange.parquet")

stackexchange.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:145bf165604c0a58bfc16688c90e898bedaeb4878afbb60361bcc3cc579405ae
+size 3713863154