Verifying object attribute modification

mining_in_logarithmic_space_constant_difficulty.py

@@ -35,7 +35,12 @@ def Compress(m, k, C, previous_score, previous_ℓ):
     return π + χ, new_score, ℓ
 
 def uparrow(C, μ):
-    return [block for block in C if block.level >= μ and block.level_min <= μ]
+    chain = [block for block in C if block.level >= μ and block.level_min <= μ]
+    for blockIndex, block in enumerate(chain):
+        print('a', block.level_min, μ)
+        block.level_min = μ
+        print('b', chain[blockIndex].level_min)
+    return chain
 
 # Proceeding by dichotomy may not be worth it.
 # For instance for the first 60 000 blocks, we have in theory 10 levels for the last blocks while log2(256) = 8, so because of first blocks not having a higher than 8 level, it doesn't seem worth it at the beginning at least.