我正在尝试读取txt
文件的每一行,并在不同的文件中打印出每一行。假设,我有一个文件如下:
How are you? I am good.
Wow, that's great.
This is a text file.
......
现在,我希望filename1.txt
拥有以下内容:
How are you? I am good.
filename2.txt
:
Wow, that's great.
等等。
我的代码是:
#! /usr/bin/Python
for i in range(1,4): // this range should increase with number of lines
with open('testdata.txt', 'r') as input:
with open('filename%i.txt' %i, 'w') as output:
for line in input:
output.write(line)
我得到的是,所有文件都包含文件的所有行。我希望每个文件只有1行,如上所述。
答案 0 :(得分:8)
在for循环中移动第二个with
语句,而不是使用外部for循环来计算行数,使用enumerate
函数返回一个值及其索引:
with open('testdata.txt', 'r') as input:
for index, line in enumerate(input):
with open('filename{}.txt'.format(index), 'w') as output:
output.write(line)
此外,format
的使用通常优先于%
字符串格式化语法。
答案 1 :(得分:1)
Here is a great answer, for how to get a counter from a line reader.通常,您需要一个循环来创建文件并读取每一行而不是外部循环创建文件和内部循环读取行。
以下解决方案。
#! /usr/bin/Python
with open('testdata.txt', 'r') as input:
for (counter,line) in enumerate(input):
with open('filename{0}.txt'.format(counter), 'w') as output:
output.write(line)