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Python completes a detailed introduction to reading and saving file classes
Python completes a detailed introduction to reading and saving file classes
这篇文章主要介绍了Python实现读取并保存文件的类,涉及Python针对文件的读写操作相关实现技巧,需要的朋友可以参考下
本文实例讲述了Python实现读取并保存文件的类。分享给大家供大家参考，具体如下：
这个类写在一个叫class_format.py 的文件里， 放在D盘
>>> import os
>>> os.chdir("D:\\")
>>> os.getcwd()
'D:\\'
>>> os.listdir(".")
......有一个testcsv.txt 文件放在D盘，内容如下（oi的两边有空格）：
1 100 3000 56 34 23 oi
这个代码的ReadData模块用到了csv.reader这个方法，delimiter='\n' 表示分隔符为换行符，quotechar=" " 表示引用字符为空格，quoting=csv.QUOTE_NONNUMERIC 表示，reader把未引用的区域转换为float类型， writer把非数值的字段用字符引用。
这个模块使用方法：
>>> from class_format import FormatData
>>> myInstance = FormatData()
>>> read_material = myInstance.ReadData("testcsv.txt")
Data read!
>>> read_material
[1.0, 100.0, 3000.0, 56.0, 34.0, 23.0, 'oi']
>>> result = myInstance.SaveData("resultcsv.txt",read_material)
Data saved!这样testcsv.txt中的内容就被写入 resultcsv.txt文件中了
代码如下：
#!/usr/bin/python
""" Chapter 15 of Beginning Programming With Python - For Dummies """
import csv
class FormatData:
def init(self, Name="",Age=0, Using_Vim=False):
self.Name = Name
self.Age = Age
self.VimUser = Using_Vim
def str(self):
OutString = "'{0}', {1}, {2}".format(self.Name, self.Age, self.VimUser)
return OutString
def SaveData(self, Filename = "", DataList = []):
with open(Filename, "w") as csvfile:
DataWriter = csv.writer(csvfile, delimiter='\n',quotechar=" ",quoting=csv.QUOTE_NONNUMERIC)
DataWriter.writerow(DataList)
csvfile.close()
print("Data saved!")
def ReadData(self,Filename=""):
with open(Filename, "r") as csvfile:
DataReader = csv.reader(csvfile, delimiter='\n',quotechar=" ",quoting=csv.QUOTE_NONNUMERIC)
Output = []
for Item in DataReader:
Output.append(Item[0])
csvfile.close()
print("Data read!")
return Output【相关推荐】
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