edit interfaces file under /etc/network in Raspberry-Pi using Python

Question

I'm currently working with RaspberryPi-3 with Rasbian installed. I want to auto-reconnect to a network to a specific network. Going through the internet, I found out a way to do it i.e. by editing the interfaces file under /etc/network. I want to edit this file using some script (preferably Python-3). I just need to add these lines to the interfaces file:

auto wlan0
iface wlan0 inet dhcp
    wpa-ssid <my-SSID>
    wpa-psk <my-PassKey>

Please help me regarding this issue.

You may find existing answers that will help by searching for things like "python edit file" or "python append lines to file". — Jeff B
– Jeff B, Commented Jan 22, 2019 at 16:55
Whatever you see on configure wi-fi setting on /etc/network is outdated since Debian/Raspian Jessie. The setting should be done via /etc/wpa_supplicant/wpa_supplicant.conf. — hcheung
– hcheung, Commented Feb 3, 2019 at 2:17
Furthermore, auto reconnect of wifi can be done via linux system configuration than using python script. — hcheung
– hcheung, Commented Feb 3, 2019 at 2:21

mz0 · Accepted Answer · 2019-01-24 19:30:26Z

0

If you have no specific reason to do that in Python I'd suggest a simple shell script like:

MYSSID=WiFi1
WIFIPW=Zekrett1

cat >> /etc/network/interfaces << EoNet
auto wlan0
iface wlan0 inet dhcp
    wpa-ssid $MYSSID
    wpa-psk  $WIFIPW
EoNet

the same in Python 2/3:

ssid='WiFi1'
wifipw='Zekrett1'

with open('/etc/network/interfaces', 'a') as netcfg:
    netcfg.write('auto wlan0\n'
                 'iface wlan0 inet dhcp\n'
                 '    wpa-ssid {}\n'
                 '    wpa-psk  {}\n'.format(ssid, wifipw))

edited Jan 24, 2019 at 19:30

answered Jan 22, 2019 at 17:27

mz0

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1 Comment

Subhadeep Datta Over a year ago

There is a small correction though! The path should be /etc/network/interfaces instead of /etc/network

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