Python: 从文件中读取标记然后使用标记得到 class

Question

我收到了 sheet，但遇到了问题。 The Task

这是我的记事本 txt：maths_mark 我想像这样创建它：

标记 => 90 = 10M1
标记 => 80 = 10M2
标记 => 70 = 10M3
标记 => 60 = 10M4
标记 => 50 = 10M5
标记 => 40 = 10M6
标记 => 30 = 10M7
标记 => 20 = 10M8
标记 => 10 = 10M9

我不知道如何从文件中读取标记，然后创建一个包含名称、标记和 class 的新文本文件。

如果有人能提供帮助，我们将不胜感激。

谢谢，Noob Coder

Answer 1

A bit of google can help here 该文章提供了打开和写入文件所需的一切。让你走上正确的道路：您只需调用 f=open("fileName.txt","w+") 即可为您打开现有文件并将其存储到一个变量中。然后你可以 file_line=f.readlines() 一次抓取一行。根据需要操纵结果。使用操作的结果重新创建一个新的字符串变量 result= "My data"，然后使用 f2=open("newFileName.txt","w+") 和一个新的文件名来创建一个新文件，您将在该文件上使用 f2.write(result) 以写入文件。确保关闭我们的文件 f.close(),f2.close()

数据操作部分由您决定！

Answer 2

I am stuck on how to read the marks from the file then creating a new text file with the names, marks and class.

fileList = list()
with open("Maths_Marks", 'r') as fp:
        fp = fp.readlines()
        for line in fp:
            tmpLine = line.split(",")
            sname = tmpLine[0]
            fname = tmpLine [1]
            marks = tmpLine[2]
            #Write your own logic to get GroupNumber.
            #Append into line using
            #line = line.strip() + "," + GroupNumber
            #fileList.append(line.strip())


#Open new file Maths_Group and write into that
with open("Maths_Group",'w') as s:
     for line  in filelist:
         print >> s, line

"line" will give you "Jack,Daniels,90"

line = line.strip() + "," + GroupNumber => will give you Jack,Daniels,90,10M1

如果要提取每个字段，请使用 else 保留下面的部分。

sname = tmpLine[0]
fname = tmpLine[1]
marks = tmpLine[2]

希望对您有所帮助。

Answer 3

import csv

# function to process data
def process_data(data):
    for item in data:
        marks = int(item[2])
        mclass = 'incorrect data entry try again'
        if marks == 0:
            mclass = "10.9"
        elif marks >= 0 and marks <= 100:
            mclass = "10.{}".format(10 - int(item[2][0]))
        yield '"{}","{}",{},{}'.format(item[0],item[1],item[2],mclass)

# read data to memory
data = []
with open("Maths_Mark.txt", "r") as csv_in:
    data = list(csv.reader(csv_in, delimiter=','))

# write contents to file
with open('Maths_Group.txt', 'w') as csv_out:
    for line in process_data(data):
        csv_out.write(line + "\n")

Python: 从文件中读取标记然后使用标记得到 class

Python: Reading marks from a file then using marks to get class

python

notepad

file

text-files

readfile