Question

with open ("a.txt", "a+") as f:
    f.write("Hello ")

当前，这将进入文本文件，如下所示。

hello
hello

我也尝试过

for line in f:
    f.write(line.replace("\n", ""))

那没有用。

有什么想法吗？

Answer 1

with open('a.txt', 'r') as istr, open('output.txt', 'w') as ostr:
    for i, line in enumerate(istr):
        # Get rid of the trailing newline (if any).
        line = line.rstrip('\n')
        if i == 0:
            line += 'Hello'
        print(line, file=ostr)

Answer 2

也许使用：

with open ("a.txt", "r") as f, open ("b.txt", "w") as f2:
    f2.write(f.read().rstrip()+"hello ")
    os.rename("b.txt", "a.txt")

Answer 3

这是对我有用的@ U9-Forward代码的编辑版本。

with open ("a.txt", "r") as f, open ("b.txt", "w") as f2:
    f2.write(f.read().rstrip()+"hello ")
    os.remove("a.txt")
    os.rename("b.txt", "a.txt")

如何在第一行末尾添加文本

3 个答案: