Python 文件读写基础操作实例

本文针对python入门者提供了一个文件读写的实例，并且对程序进行了详细的分析，保证刚接触到python的入门者能理解。
代码如下：

---

"""
created on Aug 3 2007

@author:suqi791776
"""
def main():
    infile = open("test1.txt","r") #test1 is a defined name; r    
    #represents the process mode of test1 is read;
    outfile = open("test2.txt","w")# w represents the process mode 
    #of test2 is write;

    countlines = countlens = 0 #define two varibles respectively 
    #represents the number of lines and char
    for line in infile
        countlines += 1 #the number of line adding
        countlens += len(line) #the number of char adding 
        outfile.write(line) #copy test1 to test2 line by line
    infile.close() #close the test1
    outfile.close() #close the test2
main()

注意：

在

infile = open(“test1.txt”,”r”)

语句中，文件名test1要加文件类型限制，如果仅仅是

infile = open(“test1”,”r”)

就会报错：

FileNotFoundError: [Errno 2] No such file or directory: ‘test1’