用 python 中的字符串拆分文件中的每一行

Question

This is concerning Python: I'm trying to figure out how to read a file line by line, separate all content on any side of an “=“ sign, and store each object in the list (of each line) into separate variables which are stored in an instance of a class: Ie 1+3 = 4*1 = 6-2 would be a: “1+3”, b: “4*1”, c: “6-2” inside of the class dVoc. Here is what I tried, however, it seems to just be reading and printing the file as is:

import getVoc

class dVoc:
    def __init__(self, a, b):
        self.a = a
        self.b = b
    

def splitVoc():
    
    with open("d1.md","r") as d1r:
        outfile = open(f,'r')
        data = d1r.readlines()
        out_file.close()
        
        def_ab = [line.split("=") for line in data] 
        
        def_ab
        
        dVoc.a = def_ab[0]
        dVoc.b = def_ab[-1]   
            
print(dVoc.a)

Answer 1

You never call splitVoc , so it never populates dVoc . The minimal fix is to just call it.

Even once you do that though, your code is misleading ( splitVoc is setting class attributes on dVoc itself, not making an instance of dVoc with instance attributes of a and b ). A complete fix (removing all code that's currently doing nothing useful) would look like:

class dVoc:
    def __init__(self, a, b):
        self.a = a
        self.b = b
    

def splitVoc():
    
    with open("d1.md","r") as d1r:
        # d1r is already an iterable of lines, no need to call .readlines()
        # just to iterate it and discard it            
        def_ab = [line.split("=") for line in d1r] 

        # Uses the list produced from splitting the first and last lines
        # only; make sure that's the intent
        return dVoc(def_ab[0], def_ab[-1])

voc = splitVoc()
# Thanks to only using a, this is equivalent to reading one line from the file,
# splitting it on '=', and ignoring the entire rest of the file
print(voc.a)