How to read txt files in python?
Two ways to open files
f = open("data.txt","r") #设置文件对象 f.close() #关闭文件 #为了方便,避免忘记close掉这个文件对象,可以用下面这种方式替代 with open('data.txt',"r") as f: #设置文件对象 str = f.read() #可以是随便对文件的操作
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Reading files
1. Simply read the file into a string
f = open("data.txt","r") #设置文件对象 str = f.read() #将txt文件的所有内容读入到字符串str中 f.close() #将文件关闭
2. Read the entire file line by line
#第一种方法 f = open("data.txt","r") #设置文件对象 line = f.readline() line = line[:-1] while line: #直到读取完文件 line = f.readline() #读取一行文件,包括换行符 line = line[:-1] #去掉换行符,也可以不去 f.close() #关闭文件 #第二种方法 data = [] for line in open("data.txt","r"): #设置文件对象并读取每一行文件 data.append(line) #将每一行文件加入到list中 #第三种方法 f = open("data.txt","r") #设置文件对象 data = f.readlines() #直接将文件中按行读到list里,效果与方法2一样 f.close() #关闭文件
3. Read the file into the array
import numpy as np data = np.loadtxt("data.txt") #将文件中数据加载到data数组里
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