import re
hrefs = ["https://w...content-available-to-author-only...n.com/adidas-Melange-Performance-T-Shirt-Charcoal/dp/B07P4LVZNL/ref=sr_1_fkmr1_2?dchild=1&keywords=Adidas+M%C3%A8lange+Tech+T-Shirt+A372&qid=1579685244&sr=8-2-fkmr1",
"https://w...content-available-to-author-only...n.com/adidas-Originals-Solid-Melange-Purple/dp/B07DXPN7TK/ref=sr_1_fkmr2_1?dchild=1&keywords=Adidas+M%C3%A8lange+Tech+T-Shirt+A372&qid=1579685244&sr=8-1-fkmr2",
"https://w...content-available-to-author-only...n.com/adidas-Game-Mode-Polo-Multi-Sport/gp/B07R23QGH6/ref=sr_1_fkmr2_2?dchild=1&keywords=Adidas+M%C3%A8lange+Tech+T-Shirt+A372&qid=1579685244&sr=8-2-fkmr2"]
for href in hrefs:
asin = re.search(r'/[dg]p/([^/]+)', href, flags=re.IGNORECASE)
if asin:
print(asin.group(1))
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