file_object1.close() """ 关于readlines()方法: 1、一次性读取整个文件。 2、自动将文件内容分析成一个行的列表。 """ file_object2 = open("test.py",'r') try: lines = file_object2.readlines() print "type(lines)=",type(lines) #type(lines)= <type 'list'> for line in lines: print ...
<file>.read() 文件的全部剩余内容作为一个大字符返回 例子 # example01.pya =0infile =open('names.txt')forlineininfile:print(line, end='') a = a+1ifa ==3:breakprint('\n', end='') allchr = infile.read()print(allchr)# 输出结果如下# John Zelle# Zaphod Beeblebrox# Guido VanRossum...
try: with open('data.txt', 'r', encoding='utf-8') as file: for line in file: print(line.strip()) except FileNotFoundError: print("File not found.") 1.2. Using readlines() The readlines() method reads all the lines of the file at once and returns them as a list of strings....
file_object.readline() 优点:readline()方法每次读取一行;返回的是一个字符串对象,保存当前行的内存,不占用内存 缺点:速度比readlines()慢很多 示例代码: # 读取一行 f = open('test.txt', 'r+', encoding='utf-8') print("读取一行 ===") line = f.readline() while line: # 打印当前文件指针的位...
## 方法一:使用`readline()`方法Python内置的`readline()`方法可以用来逐行读取文件内容。它的基本语法如下:```pythonfile.readli 读取文件 python 示例代码 while read line读取 # cat ipcitytable 类似下面这样367656960 367722495 台北798588928 798605311 北京798621696 798687231 北京973996032 974127103 朋友 IP地址...
Using a Loop file_name = "sample.txt" # Open the file in read mode with open(file_name, "r") as file: # Read and process each line for line in file: print(line.strip()) # strip() removes newline characters Using an Iterator Continue Reading...Next...
file_object1 = open(filename,'r') try: while True: line = file_object1.readline() if line: print "line=",line else: break finally: file_object1.close() """ 关于readlines()方法: 1、一次性读取整个文件。 2、自动将文件内容分析成一个行的列表。
file_object1=open("test.py",'r')try:whileTrue:line=file_object1.readline()ifline:print("line=",line)else:breakfinally:file_object1.close()"""关于readlines()方法:1、一次性读取整个文件。2、自动将文件内容分析成一个行的列表。"""
Python open function Theopenfunction is used to open files in Python. open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None) Thefileis the name of the file to be opened. Themodeindicates how the file is going to be opened: for reading, writing, or appending. ...
文件大概有80个G大小,想用多线程,我知道可以用f.seek()去设置偏移,以达到从不同的位置开始读入的效果可是应该如何给每个线程分配一个合适偏移? with open(r'file.txt', 'rb') as f: for line in f: dosomething(line) PIPIONE 浏览3613回答2 2回答 白板的微信 用mmap 模块,像访问内存一样读写文件。