f.write("This is line %d\r\n"% (i+1)) f.close() #Open the file back and read the contents #f=open("guru99.txt","r")#iff.mode == 'r':# contents=f.read() # print (contents) #or, readlines reads the individual line into a list #fl=f.readlines() #forxinfl: #print(x...
with open('the-zen-of-python.txt') as f: contents = f.read() print(contents)输出...
3.2 处理FileNotFoundError异常 defcount_words(filename):'''计算一个文件大致包含多少个单词'''try: with open(filename) as f1: contents=f1.read()exceptFileNotFoundError: msg="Sorry, the file"+ filename +"does not exist."print(msg)else:#计算文件大致包含多少个单词words =contents.split() nu...
1 with open('pi_digits.txt')as file_object: 2 contents = file_object.read() 3 print(contents) 1. 2. 3. (当前目录下已有pi_digits.txt) 函数open()接受一个参数,文件名称,然后在当前执行的文件所在的目录中查找指定的文件,最后返回一个文件对象。 关键字with在不需要访问文件后将其关闭。(也可以...
在Python 中读取文件是使用 read() 方法完成的。 这是一个例子: f = open(“testfile.txt”, “r”) print(f.read()) #prints contents of testfile.txt to console f.close() #closes the file 在这个代码片段中,我们再次打开了我们的测试文件,但这次是在只读模式('r')。 然后我们在文件对象(由 f...
with open(path_to_file) as f: contents = f.readlines() 1. 2. 在实际使用中,我们可用使用 with 语句自动关闭文件,而不需要手动执行 close() 方法。 示例 我们使用 the-zen-of-python.txt 文件进行演示,该文件的内容如下: Beautiful is better than ugly. ...
def read_file(file_name): file_contents = None try: with open(file_name, 'r', encoding='utf-8') as f: file_contents = f.read() except FileNotFoundError: print('无法打开指定的文件!') except LookupError: print('指定了未知的编码!') except UnicodeDecodeError: print('读取文件时解码错误...
#read and dislay text file print("read and dislay text file") fname = input("Enter filename:") print #display a empty line #attempt to open file for reading try: fobj = open(fname, 'r') except IOError: print("file open error:") else: #display contents print('_ '*10,) for ...
The data can be in the form of files such as text, csv, and binary files. To extract data from these files, Python comes with built-in functions to open a file and then read and write the file’s contents. After reading this tutorial, you can learn: – ...
The example reads the whole file and prints its contents. with open('works.txt', 'r') as f: We open the works.txt file in the read mode. Since we did not specify the binary mode, the file is opened in the default text mode. It returns the file object f. The with statement ...