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インターフェイス ファイルを書き換えるスクリプトをセットアップしようとしていますが、最終的には IP アドレスが静的に変更されますが、実行すると「new_location_interfaces.truncate()」という行にエラーが表示され、次のように表示されます。その「str」オブジェクトには属性 truncate がありません。

from sys import argv
from os.path import exists
import os

script_name = argv

print "You are currently running %s" % script_name
print "Version: 0.1"
print """Desciption: This script will change the IP address of the
Raspberry Pi from dynamic to static.
"""
print "If you don\'t want to continue, hit CTRL-C (^C)."
print "If you do want that, hit RETURN"

raw_input("?")

# Main code block

text_to_copy = """
auto lo\n
iface lo inet loopback
iface etho inet dhcp\n
allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp
"""

if exists("/etc/network/interfaces"):
    print "\nFile exists."
    interfaces_file = open("/etc/network/interfaces", 'w')
    print "Truncating/erasing contents . ."
    interfaces_file.truncate()
    print "Writing contents . ."
    interfaces_file.write(text_to_copy)
    interfaces_file.close()
else:
    print "\nCould not find the \'interfaces\' file."
    print "Please specify the location:",
    new_location_interfaces = raw_input()
    open(new_location_interfaces, 'w')
    print "Truncating/erasing contents . ."
    new_location_interfaces.truncate()
    print "Writing contents . ."
    new_location_interfaces.write(text_to_copy)
    new_location_interfaces.close()

私はPythonに非常に慣れていないため、私のコードはおそらくひどいですが、助けていただければ幸いです。

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1 に答える 1

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new_location_interfaces is not a file object. It is a string, the result of the raw_input() call:

new_location_interfaces = raw_input()

The next line, the open() call, is not assigned to anything:

open(new_location_interfaces, 'w')

Perhaps you wanted to truncate that object?

For example:

new_location_interfaces = raw_input()
fh = open(new_location_interfaces, 'w')
print "Truncating/erasing contents . ."
fh.truncate()
print "Writing contents . ."
fh.write(text_to_copy)
fh.close()

However, opening a file for writing (mode set to w) already truncates the file, your .truncate() calls are entirely redundant.

于 2013-09-21T19:13:07.380 に答える