如何将已经打开的文件转换为字符串？

Question

Given an open file, return the contents as a string.( This assumes the autotester test the function with a random file so the variable should be open to multiple files of the same type)

def read_file(myfile):
'''(file) -> str
Read the open file and return as a string.'''

Answer 1

def read_file(myfile):
    return myfile.read()

Answer 2

content = myfile.read()

Or to read it line by line and put it in a list:

content_list = myfile.readlines()

You can then use:

content_list = [x.strip() for x in content_list]

to remove \\n characters.

Answer 3

打开文件后（我建议使用with语句，例如with open(filename.txt, "r") as file ，使用fileString = file.read()和fileString将成为内容

Answer 4

To deal with larger files, it's a good idea to read in chunks of fixed size. If you try to open an image, for example, and don't use buffered reading, you'll get a MemoryError .

def read_file(filename):
    BUFFER_SIZE = 65536
    contents = []
    with open(filename, "r") as f:
        while True:
            chunk = filename.read(BUFFER_SIZE)
            if not chunk:
                break
            contents.append(chunk)
    return "".join(contents)