'''
以下是同一个功能的代码段落,但是所耗时间却是天差地别
'''
st = time.time()
# 字典格式 共耗时40s dsd = {} # for key, value in file_h.items(): # if value in hash_values: # dsd[value] = dsd.get(value, []) + [key] # 列表格式 共耗时32s # keys = [] # values = [] # files = list(file_h.keys()) # haxis = list(file_h.values()) # for file, haxi in zip(files, haxis): # if haxi in keys: # index = keys.index(haxi) # values[index].append(file) # else: # keys.append(haxi) # values.append([file]) # 字典读取速度,列表的写入速度 共耗时0.07s keys = {} values = [] files = list(file_h.keys()) haxis = list(file_h.values()) for file, haxi in zip(files, haxis): if haxi in keys: index = keys[haxi] values[index].append(file) else: keys[haxi] = len(keys) values.append([file]) print(f'查重共耗时:{time.time() - st}')
列表的写入速度快,读取速度慢;
字典的写入速度慢, 读取速度快;
python在检索list的时候是比较慢的,python在检索字典的时候速度是比较快的。
标签:存储,python,list,写入,keys,values,file,haxi,append From: https://www.cnblogs.com/lld76/p/17921480.html