Python记录
num = str(format(15,'b'))
num = str(15000)
for i in num:
print("index: %d",num.index(i))
'''
index: %d 0
index: %d 1
index: %d 1
index: %d 0
index: %d 1
index: %d 0
index: %d 0
index: %d 1
'''
'''
index: %d 0
index: %d 1
index: %d 2
index: %d 2
index: %d 2
'''