Python 从txt文件捕获链接

我有一个文件txt，其中有几行。。。其中一些是链接。我的问题是：如何捕获所有这些链接并将它们保存到另一个txt文件中？我是个新手

我试过这个，但不起作用：

filee = open("myfile.txt").readlines()
out_file = open("out.txt","w")
out_file.write("")
out_file.close()

for x in filee:
    if x.startswith("http"):
        out_file.write(x)
        print (x)

---

无法写入已关闭的文件。只需将代码末尾的out_file.close（）移出即可：

filee = open("myfile.txt").readlines()
out_file = open("out.txt","w")
out_file.write("")

for x in filee:
    if x.startswith("http"):
        out_file.write(x)
        print (x)
out_file.close()

这里有一个更干净的版本：

# open the input file (with auto close)
with open("myfile.txt") as input_file:

    # open the output file (with auto close)
    with open("out.txt", "w") as output_file:

        # for each line of the file
        for line in input_file:

            # append the line to the output file if start with "http"
            if line.startswith("http"):
                output_file.write(line)

您还可以将两者结合使用：

# open the input/output files (with auto close)
with open("myfile.txt") as input_file, open("out.txt", "w") as output_file:

    # for each line of the file
    for line in input_file:

        # append the line to the output file if start with "http"
        if line.startswith("http"):
            output_file.write(line)

---

无法写入已关闭的文件。只需将代码末尾的out_file.close（）移出即可：

filee = open("myfile.txt").readlines()
out_file = open("out.txt","w")
out_file.write("")

for x in filee:
    if x.startswith("http"):
        out_file.write(x)
        print (x)
out_file.close()

这里有一个更干净的版本：

# open the input file (with auto close)
with open("myfile.txt") as input_file:

    # open the output file (with auto close)
    with open("out.txt", "w") as output_file:

        # for each line of the file
        for line in input_file:

            # append the line to the output file if start with "http"
            if line.startswith("http"):
                output_file.write(line)

您还可以将两者结合使用：

# open the input/output files (with auto close)
with open("myfile.txt") as input_file, open("out.txt", "w") as output_file:

    # for each line of the file
    for line in input_file:

        # append the line to the output file if start with "http"
        if line.startswith("http"):
            output_file.write(line)

旁注：处理文件时使用。这样就不可能意外忽略

close

调用（不需要

close

调用），并且更容易看到何时可以使用资源。旁注：在处理文件时使用。这样就不可能意外忽略

close

调用（不需要

close

调用），并且更容易看到何时可以使用资源。