即使文件相同，filecmp 也会返回 False

Question

我试图在两个文件之间进行比较filecmp，问题是结果始终是"No, the files are NOT the same"，这意味着False 即使文件是相同的。我正在向两个不同的文件写入相同的内容。首先我写入文件revision_1.txt：original_stdout = sys.stdoutwith open('revision_1.txt', 'w') as rev1:       sys.stdout = rev1       print(revision)  # revision is output from command i took beforesys.stdout = original_stdoutif filecmp.cmp('revision_1.txt', 'revision_2.txt'):    # revision_2.txt is file I c    print("Both the files are same")else:    # Do whatever you want if the files are NOT the same    print("No, the files are NOT the same")original_stdout = sys.stdoutwith open('revision_2.txt', 'w') as rev2:       sys.stdout = rev2       print(revision)  # revision is output from command i took beforesys.stdout = original_stdout我的目标是如果文件相等 - 停止脚本。如果不是，它将重写revision_2.txt然后发送邮件，（我已经编写了邮件代码）。

Answer 1

尝试将shallow设置为false（默认为True），即

if filecmp.cmp('revision_1.txt', 'revision_2.txt', shallow=False):

从文档中：如果为 true，则具有相同 os.stat() 签名的文件被视为相等。否则，将比较文件的内容。

https://docs.python.org/3/library/filecmp.html#filecmp.cmp

Answer 2

如何忽略 message-id （我只需要修订值）？

查看脚本输出：不等于修订版：fpc1-1603878922-228

FFFFFFF 修订版：fpc1-1603878922-228

FFFFFFFF

脚本：

import smtplib

import email.message

from email.mime.text import MIMEText

from ncclient import manager

from ncclient.xml_ import *

import sys

import time

import filecmp

# Connecting to juniper cc-vc-leg

conn = manager.connect(

        host='10.1.1.1',

        port='830',

        username='test',

        password='test',

        timeout=10,

        device_params={'name':'junos'},

        hostkey_verify=False)

# Take juniper commands

resault = conn.command('show version | match Hostname', format='text')

revision = conn.command('show system commit revision', format='text')

compare_config = conn.compare_configuration(rollback=1)

# Open & read file vc-lg_rev.text

f = open('vc-lg_rev.text', 'r')

d = f.read()

# Check if revision output is equal to file "vc-lg_rev.text"

# If equal exit the script

if  (revision == d):

       print('equal')

       exit()

       print('I hop script stopped')

else:

       print('Not equal')

       print(revision)

       print('FFFFFFF')

       print(d)

       print('FFFFFFF')

# To save last revision number to "vc-lg_rev.text"

with open('vc-lg_rev.text', 'w', buffering=1) as rev1:

        rev1.write(str(revision))

        rev1.flush()

rev1.close()

# This is how i copy "compare_config" output to file "vc-lg_compare.text"

original_stdout = sys.stdout

with open('vc-lg_compare.text', 'w') as a:

        sys.stdout = a

        print(compare_config)

sys.stdout = original_stdout

def send_email(compare):

    server = smtplib.SMTP('techunix.technion.ac.il', 25)

    email_reciver = '[e-mail]', '[e-mail]'

    message = f"'Subject': mail_subject \n\n {compare}"

    ID = 'Juniper_Compare'

    server.sendmail(ID, email_reciver, message)

with open('vc-lg_compare.text', 'r') as compare:   # "as" means file object called compare

        text = str(compare.read())                 # I want to recive the output as string to look specific word in the file

        if (text.find('+') > -1) or (text.find('- ') > -1):

                send_email(text)

Answer 3

您对文件的使用不寻常：

import filecmp

revision = "08/15"

with open('revision_1.txt', 'w') as rev1:

      rev1.write(revision)

with open('revision_2.txt', 'w') as rev2:

      rev2.write(revision)

with open('revision_3.txt', 'w') as rev3:

      rev3.write(revision + "-42")

# should compare equal

if filecmp.cmp('revision_1.txt', 'revision_2.txt'):

    print("Identical")

else:

    print("No, the files are NOT the same")

# should NOT compare equal

if filecmp.cmp('revision_1.txt', 'revision_3.txt'):

    print("Identical")

else:

    print("No, the files are NOT the same")

印刷

Identical

No, the files are NOT the same