我必须使用泡菜来存储一些数据。我创建了一个用于处理数据I / O的类,该函数可用于加载数据并打印所有信息,但是当我调用该函数以打印数据时,它仅在第一个字典中进行插入。所有输入都被保存(当我打开pickle文件时,可以看到一些与其他输入相关的数据)。
我检查了一些stackoverflow问题,例如:Iterating over dictionaries using 'for' loops和Best way to loop through multiple dictionaries in Python,但是没有一个示例给我期望的输出。
这是可用于处理泡菜的DataBase类:
import pickle
from pathlib import Path
class DataBase:
def __init__(self, out_file):
self.out_file = out_file
def Create(self, file_name):
if not Path(self.out_file).exists():
with open(self.out_file, "w+b") as this_file:
new_file = pickle.dump(file_name, this_file, pickle.HIGHEST_PROTOCOL)
elif Path(self.out_file).exists():
self.Update(file_name)
else:
print("Unknown error!")
def Update(self, file_name):
with open(self.out_file, "a+b") as this_file:
updated_file = pickle.dump(file_name, this_file, pickle.HIGHEST_PROTOCOL)
def Load(self):
with open(self.out_file, "rb") as this_file:
loaded_file = pickle.load(this_file)
return loaded_file
def PrintFile(self):
for k, v in self.Load().items():
print(f"{k} {v}")
这是我为测试该类而编写的代码:
from DataBase import DataBase as DB
dict0 = {1:'A', 2:'E', 3:'I', 4:'O', 5:'U'}
dict1 = {0:"Water", 1:"Fire", 2:"Air", 3:"Sand"}
db = DB("test")
db.Create(dict0)
db.Create(dict1)
db.PrintFile()
我希望输出为:
1 A
2 E
3 I
4 O
5 U
0 Water
1 Fire
2 Air
3 Sand
但是我得到的输出是:
1 A
2 E
3 I
4 O
5 U
所有信息都被保存了,当我打开带有文本ediot的pickle文件时,我可以看到一些存储在其中的信息:
��#}�(K�A�K�E�K�I�K�O�K�U�u.��)}�(K�Water�K�Fire�K�Air�K�Sand�u
例如,我们可以在文件中看到Air。
答案 0 :(得分:1)
您可以在同一文件上多次运行pickle.load()。
赞:
import pickle
from pathlib import Path
class DataBase:
def __init__(self, out_file):
self.out_file = out_file
def Create(self, file_name):
if not Path(self.out_file).exists():
with open(self.out_file, "w+b") as this_file:
new_file = pickle.dump(file_name, this_file, pickle.HIGHEST_PROTOCOL)
elif Path(self.out_file).exists():
self.Update(file_name)
else:
print("Unknown error!")
def Update(self, file_name):
with open(self.out_file, "a+b") as this_file:
updated_file = pickle.dump(file_name, this_file, pickle.HIGHEST_PROTOCOL)
def Load(self):
with open(self.out_file, "rb") as this_file:
loaded_file = pickle.load(this_file)
loaded_file2 = pickle.load(this_file)
return [loaded_file, loaded_file2]
def PrintFile(self):
for i in self.Load():
for k, v in i.items():
print(f"{k} {v}")
if __name__ == '__main__':
# from DataBase import DataBase as DB
dict0 = {1: 'A', 2: 'E', 3: 'I', 4:'O', 5: 'U'}
dict1 = {0: "Water", 1: "Fire", 2: "Air", 3: "Sand"}
db = DataBase("test")
db.Create(dict0)
db.Create(dict1)
db.PrintFile()
给出以下输出:
1 A
2 E
3 I
4 O
5 U
0 Water
1 Fire
2 Air
3 Sand
答案 1 :(得分:-1)
您可以在腌制两个字典之前尝试将它们组合在一起,但这可能不是特定应用程序想要的。我的猜测是.load
的{{1}}部分没有加载两个字典,因此仅打印/返回第一个。