119 lines
3.5 KiB
Python
119 lines
3.5 KiB
Python
import pandas as pd
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import re
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class InteractionAnalysis:
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def __init__(self, word_exclusions: set[str]):
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self.word_exclusions = word_exclusions
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def _tokenize(self, text: str):
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tokens = re.findall(r"\b[a-z]{3,}\b", text)
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return [t for t in tokens if t not in self.word_exclusions]
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def interaction_graph(self, df: pd.DataFrame):
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interactions = {a: {} for a in df["author"].dropna().unique()}
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# reply_to refers to the comment id, this allows us to map comment/post ids to usernames
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id_to_author = df.set_index("post_id")["author"].to_dict()
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for _, row in df.iterrows():
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a = row["author"]
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reply_id = row["reply_to"]
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if pd.isna(a) or pd.isna(reply_id) or reply_id == "":
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continue
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b = id_to_author.get(reply_id)
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if b is None or a == b:
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continue
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interactions[a][b] = interactions[a].get(b, 0) + 1
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return interactions
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def average_thread_depth(self, df: pd.DataFrame):
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depths = []
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id_to_reply = df.set_index("id")["reply_to"].to_dict()
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for _, row in df.iterrows():
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depth = 0
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current_id = row["id"]
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while True:
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reply_to = id_to_reply.get(current_id)
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if pd.isna(reply_to) or reply_to == "":
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break
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depth += 1
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current_id = reply_to
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depths.append(depth)
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if not depths:
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return 0
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return round(sum(depths) / len(depths), 2)
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def average_thread_length_by_emotion(self, df: pd.DataFrame):
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emotion_exclusions = {"emotion_neutral", "emotion_surprise"}
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emotion_cols = [
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c
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for c in df.columns
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if c.startswith("emotion_") and c not in emotion_exclusions
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]
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id_to_reply = df.set_index("id")["reply_to"].to_dict()
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length_cache = {}
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def thread_length_from(start_id):
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if start_id in length_cache:
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return length_cache[start_id]
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seen = set()
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length = 1
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current = start_id
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while True:
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if current in seen:
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# infinite loop shouldn't happen, but just in case
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break
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seen.add(current)
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reply_to = id_to_reply.get(current)
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if (
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reply_to is None
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or (isinstance(reply_to, float) and pd.isna(reply_to))
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or reply_to == ""
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):
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break
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length += 1
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current = reply_to
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if current in length_cache:
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length += length_cache[current] - 1
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break
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length_cache[start_id] = length
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return length
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emotion_to_lengths = {}
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# Fill NaNs in emotion cols to avoid max() issues
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emo_df = df[["id"] + emotion_cols].copy()
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emo_df[emotion_cols] = emo_df[emotion_cols].fillna(0)
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for _, row in emo_df.iterrows():
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msg_id = row["id"]
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length = thread_length_from(msg_id)
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emotions = {c: row[c] for c in emotion_cols}
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dominant = max(emotions, key=emotions.get)
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emotion_to_lengths.setdefault(dominant, []).append(length)
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return {
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emotion: round(sum(lengths) / len(lengths), 2)
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for emotion, lengths in emotion_to_lengths.items()
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}
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