Python-如何一次读取一个字符的文件? [英] Python - How to read file one character at a time?

问题描述

我正在学习python文件处理.我尝试使用此代码一次读取一个字符

I am learning python file handling. I tried this code to read one character at a time

f = open('test.dat', 'r')

while (ch=f.read(1)):
    print ch

为什么不起作用

这是错误消息

C:\Python27\python.exe "C:/Users/X/PycharmProjects/Learning Python/01.py"
File "C:/Users/X/PycharmProjects/Learning Python/01.py", line 4
while (ch=f.read(1)):
         ^
SyntaxError: invalid syntax

Process finished with exit code 1

推荐答案

您的语法有点不对，您在while语句中指定的语法无效:

Your syntax is a bit off, your assignment inside the while statement is invalid syntax:

f = open('test.dat', 'r')
while True:
    ch=f.read(1)
    if not ch: break
    print ch

这将启动while循环，并在没有字符可读取时将其中断！试试看.

This will start the while loop, and break it when there are no characters left to read! Give it a try.

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