open(filename,'r')

This line of code opens a file named "filename" in read mode ('r'). This means that the contents of the file can be read, but cannot be edited or modified.

For example, if you have a file named "example.txt" and you want to open it in read mode, you can use the following code:

file = open('example.txt', 'r')

This will create a file object named "file" that can be used to read the contents of the "example.txt" file.

相关问题

open（filename，r）

这是Python中的一种文件操作方式，用于以只读模式打开一个文件。其中，filename表示文件的路径和文件名，r表示读取模式。打开文件后，可以通过读取操作获取文件中的内容。例如：

with open('example.txt', 'r') as f:
    content = f.read()
    print(content)

这段代码会打开名为example.txt的文件，并将文件中的内容读取出来并打印到控制台上。

infile = open(filename, 'r')

As an AI language model, I don't have access to your local files, so I cannot provide a specific answer for this question. However, I can explain what the code line `infile = open(filename, 'r')` does in general.

This line of code opens a file with the name specified in the variable `filename` and assigns it to the variable `infile`. The second parameter `'r'` specifies that the file should be opened in read mode. This means that the file can be read from but not written to.

After this line of code, you can perform operations on the file using the `infile` variable, such as reading its contents, iterating over its lines, or closing it when you're done.