蟒蛇中的文件大小不正确

Question

import osdef create_python_script(filename):    comments = "# Start of a new Python Program"    #filesize = 0    with open(filename, 'w') as new_file:        new_file.write(comments)        cwd=os.getcwd()        fpath = os.path.abspath(filename)        filesize=os.path.getsize(fpath)    return(filesize)print(create_python_script('newprogram.py'))我得到的结果为零，但它应该得到“31”

Answer 1

在尝试获取文件大小之前，您没有关闭文件，就像在块内所做的那样。把它带到外面：with

import os

def create_python_script(filename):

    comments = "# Start of a new Python Program"

    #filesize = 0

    with open(filename, 'w') as new_file:

        new_file.write(comments)

        cwd=os.getcwd()

        fpath = os.path.abspath(filename)

        print(fpath)

    filesize=os.path.getsize(fpath)

    return(filesize)

print(create_python_script('newprogram.py'))

# 31

Answer 2

import os

def create_python_script(filename):

  comments = "# Start of a new Python program"

  with open(filename, 'w') as file:

    file.write(comments)

    file.close()

    filepath = os.path.abspath(filename)

    filesize = os.path.getsize(filepath)

  return(filesize)

print(create_python_script("program.py"))

#this will give you correct result

Answer 3

这个也工作得很好！

    def create_python_script(filename):

      import os

      comments = "# Start of a new Python program"

      with open(filename,'w')as file:

         file.write(comments)

      filesize = os.path.getsize(filename)

      return(filesize)

    print(create_python_script("program.py"))

Answer 4

首先打开具有写入权限的文件，以在文件中添加文本。然后以读取权限打开文件以获取文件的大小。

import os

def create_python_script(filename):

    comments = "# Start of a new Python program"

    with open(filename, 'w') as pd:

        pd.write(comments)

    with  open(filename, "r"):

        filesize = os.path.getsize(filename)

        print(filesize)

    return filesize

print(create_python_script("program.py"))