arr = [["black", "1101"], ["black", "1101"], ["white", "1201"], ["black", "1102"]]
how to get the following results
Black 3
Black 1101 2
White 1
that is to know the total number of each color, which serial numbers are repeated, and how many times are they repeated?
after thinking about it for a long time, I don"t know how to start. Which master has had similar experience? please give me some advice!
from collections import Counter
data = [['','1101'], ['','1101'], ['','1201'], ['','1102']]
c1 = Counter(d[0] for d in data)
for k,v in c1.items():
print(k, v)
c2 = Counter(''.join(d) for d in data)
for k, v in c2.items():
print(k, v)
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