How to create memory pressure and analyze various trends /proc/pressure/memory from that (python/bash)

Question

From stack overflow I found :

a = []
while True:
    print len(a)
    a.append(' ' * 10**6)

But this ate up memory so quickly in real world memory pressure happens due to slow leakage in memory. I do not have any stress tool access. I tried doing dd if , but I could not see any spikes in /proc/pressure/memory

This assignment is so interesting for me but I am stuck with how to implement real time memory pressure to study the trend of /proc/pressure/memory