dokončení optimalizace kodu, zbavil jsem se pandas.

csv_check.py

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+import json
+import sys
+import csv
+
+def load(path):
+    data = []
+    with open(path, 'r', encoding='utf8') as fp:
+        reading = csv.DictReader(fp)
+        for row in reading:
+            data.append(row['JSON'])
+        return data
+
+def save(saving_csv, name_csv):
+    with open(name_csv + '.csv', 'w', encoding= 'utf8', newline='') as f:
+        writer = csv.DictWriter(f, fieldnames=['JSON'])
+        writer.writeheader()
+        for radek in saving_csv:
+            writer.writerow({'JSON': radek})
+
+def delete(csv_json, clear_json):
+    for s in csv_json:
+        if isinstance(s, str) and ',' in s:
+            idx = s.rfind(',')
+            clear_json.add(s[:idx])
+        else:
+            clear_json.add(s)
+
+def loadcsv(pattern_csv, target_csv):
+    missing = set()
+    overstay = set()
+    pattern_jsons = set(json.dumps(json.loads(x), sort_keys=True) for x in pattern_csv)
+    target_jsons = set(json.dumps(json.loads(x), sort_keys=True) for x in target_csv)
+    missing_jsons = pattern_jsons - target_jsons
+    overstay_jsons = target_jsons - pattern_jsons
+    delete(missing_jsons, missing)
+    delete(overstay_jsons, overstay)
+    save(missing, 'pridat')
+    save(overstay, 'odebrat')
+
+def main():
+    if len(sys.argv) < 3:
+        print('Chybi cesta k csv souborum.', file=sys.stderr)
+        print('Zadejte takto: <nazev_programu.py> <cesta k vzorove.csv> <cesta k cilove.csv>', file=sys.stderr)
+        sys.exit(1)
+    path_pattern = sys.argv[1] 
+    path_target = sys.argv[2]
+    pattern = load(path_pattern)
+    target = load(path_target)
+
+    loadcsv(pattern, target)
+
+if __name__ == '__main__':
+    main()
+    sys.exit(0)