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#!/usr/bin/env python3
import json
import math
import sys
with open(sys.argv[1]) as f:
posts = json.load(f)
words = [p["wordCount"] for p in posts]
n = len(words)
total = sum(words)
mean = total / n
stddev = math.sqrt(sum(w * w for w in words) / n - mean * mean)
print(f"Posts: {n}")
print(f"Total: {total} words")
print(f"Mean: {mean:.0f} words")
print(f"Std Dev: {stddev:.0f} words")
print()
print(f"{'Title':<60s} {'Words'}")
print(f"{'-----':<60s} {'-----'}")
for p in posts:
print(f"{p['title']:<60s} {p['wordCount']}")
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