Read with open as: the problem when reading the file

import codecs
import  os


data_dir="./2020"
label_file="label_list.txt"
label_list = os.path.join(data_dir, label_file)
with open(label_list, encoding='utf-8') as flist:
    print(flist.read())
    lines = [line.strip() for line in flist]
    #print(lines)

    for line in lines:
        parts = line.strip().split()

import codecs
import  os


data_dir="./2020"
label_file="label_list.txt"
label_list = os.path.join(data_dir, label_file)
with open(label_list, encoding='utf-8') as flist:
    #print(flist.read())
    lines = [line.strip() for line in flist]
    print(lines)

    for line in lines:
        parts = line.strip().split()

The first opened file here is saved in flist, lines is the parse list. From the second picture, we can see that line reads one line at a time to form a list, and then strip() removes the spaces at the beginning and the end to generate a list of lines.

import codecs
import  os


data_dir="./2020"
label_file="label_list.txt"
label_list = os.path.join(data_dir, label_file)
with open(label_list, encoding='utf-8') as flist:
    print(flist.read())
    lines = [line.strip() for line in flist]
    print(lines)

    for line in lines:
        parts = line.strip().split()

This phenomenon is not known yet, but it is probably related to the flow, so please record it first.