i have a simple python3 Script that works when I'm running it from console:
import configparser
file = 'config_test.ini'
config = configparser.ConfigParser()
config.read(file)
for key in config['test_section']: print(key)
the called ini-file looks like this:
[test_section]
testkey1 = 5
testkey2 = 42878180
testkey3 = WR50MS10:1100012307
testkey4 = WR50MS04:1100012010
testkex5 = 192.168.200.168
and the script runs fine and returns the five keys of the ini-file.
No I configured it as a cronjob every minute (running on rasbian on Raspberry Pi) via:
* * * * * python3 /home/pi/s0/testconfig.py >> /tmp/cron_debug_log.log 2>&1
and the log looks like this:
Traceback (most recent call last):
File "/home/pi/s0/testconfig.py", line 7, in <module>
for key in config['test_section']: print(key)
File "/usr/lib/python3.2/configparser.py", line 941, in __getitem__
raise KeyError(key)
KeyError: 'test_section'
Does anyone have an idea what I did wrong
Kind regards
When running from cron, your script runs in a different working directory. This means the filename it is trying to open is relative to a different directory.
You should use the absolute path to the config file in your script.
A common way of doing it in python, assuming the config file resides in the same directory as the script you're running, is using the __file__ builtin:
config_file = os.path.join(os.path.dirname(__file__), 'config_test.ini')
Related
So I'm trying the send a variable which I created, to a shell script I am calling within the parent script. The variable happens to be contain a directory which contains my python.exe. I'm receiving the variable all right, but when i try appending /python and executing a python script I'm getting "ModuleImportError", but when i use the hard coded path every thing works fine.
Parent script call startServiceConsumer
$PYTHON_HOME = /.conda/envs/mypika/bin
./startServiceConsumer.sh $PYTHON_HOME;
startServiceConsumer.sh
pythonHome=$1
echo $pythonHome
cd src/Controllers # Source project
$pythonHome/python xyz.py
exit
Error
Traceback (most recent call last):
File "xyz.py", line 3, in <module>
from src.Controllers import TaskProcessing
iam a total noob in python; i have a background in chemistry and iam doing my master in computational chemistry. Iam trying to learn computer science as fast as i can.
I currently dont know how to solve this error. I have googled the question but the answers dont actually satisfy.
I would really appreciate if you guys give me hints on how to fix this error.
Thanks,
Thanh Le
In order for the program to work, it uses codes from this file containing:
from RunRMSD import RunRMSD
RunRMSD()
from SumRMSD import SumRMSD
SumRMSD()
then it uses codes from a file (RunRMSD) containing:
run calcRMSD.py to get raw output from pymol
def RunRMSD():
# get output directory from a threefiles.txt
with open('./threefiles.txt') as fi:
fline = fi.readline()
flist = fline.split('\t')
path_output = flist[1]
import os
command = '/opt/local/bin/pymol -cqr '+'./CalcRMSD.py > '/Users/thanhle/Desktop/output/'RMSD.out'
os.system(command)
Not sure if my path is correct though.
thanhs-MacBook-Pro-2:untitled folder thanhle$ python Director_RMSD.py
Traceback (most recent call last):
File "Director_RMSD.py", line 5, in <module>
RunRMSD()
File "/Users/thanhle/Desktop/ftdock-2-dev2/untitled folder/RunRMSD.py", line 11, in RunRMSD
command = '/opt/local/bin/pymol -cqr '+'./CalcRMSD.py > '/Users/thanhle/Desktop/output/'RMSD.out'
NameError: global name 'Users' is not defined
The "command" variable is not well written:
command = '/opt/local/bin/pymol -cqr '+'./CalcRMSD.py > '/Users/thanhle/Desktop/output/'RMSD.out'
The error is thrown because the path /Users/thanhle/Desktop/output/ is not concatenated and also you are missing a apostrophe. If you don't want to parse any variable to the command it should be written:
command = '/opt/local/bin/pymol -cqr ./CalcRMSD.py > /Users/thanhle/Desktop/output/RMSD.out'
Running on Mac Os 10.10.5
Running this script to scan for hosts on the network:
import nmap
nm = nmap.PortScanner()
nm.scan('192.168.5.1/24', arguments='-O')
for h in nm.all_hosts():
if 'mac' in nm[h]['addresses']:
print(nm[h]['addresses'], nm[h]['vendor'])
When running it its printing:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/nmap/nmap.py", line 290, in analyse_nmap_xml_scan
dom = ET.fromstring(self._nmap_last_output)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/xml/etree/ElementTree.py", line 1326, in XML
return parser.close()
File "<string>", line None
xml.etree.ElementTree.ParseError: no element found: line 1, column 0
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/*/Documents/*.py", line 3, in <module>
nm.scan('192.168.0.0/24', arguments='-O')
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/nmap/nmap.py", line 235, in scan
nmap_err_keep_trace = nmap_err_keep_trace)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/nmap/nmap.py", line 293, in analyse_nmap_xml_scan
raise PortScannerError(nmap_err)
nmap.nmap.PortScannerError: 'TCP/IP fingerprinting (for OS scan) requires root privileges.\nQUITTING!\n'
I tried going to that directory and running this command in the terminal:
sudo python *.py
({'mac': '02:62:31:41:6D:84', 'ipv4': '192.168.5.1'}, {})
Any suggestions to run the script from the python IDLE?
Running IDLE as root might work, but it might not be a great idea. sudo idle
Option 1 (recommended):
Put the code requiring elevated privileges in a python file which you run with sudo. I assume you want to play with the results, so you could have the script save the results to a file, which you then read in IDLE.
The following code works in python 2.7 and 3.4
import nmap
import json
nm = nmap.PortScanner()
nm.scan('192.168.5.1/24',arguments='-O') #Note that I tested with -sP to save time
output = []
with open('output.txt', 'a') as outfile:
for h in nm.all_hosts():
if 'mac' in nm[h]['addresses']:
item = nm[h]['addresses']
if nm[h]['vendor'].values():
item['vendor'] = list(nm[h]['vendor'].values())[0]
output.append(item)
json.dump(output, outfile)
Run sudo python nmaproot.py
Since the file is written by root, you need to change ownership back to yourself.
sudo chown -r myusername output.txt
In IDLE:
import json
input = open('output.txt','r'):
json_data = json.load(input)
json_data[0] # first host
Option 2 (not recommended at all):
Use subprocess to run the file with the elevated code as root and return the output. It gets kind of messy and requires you to hardcode your password...but it's possible.
from subprocess import Popen, PIPE
cmd = ['sudo', '-S', 'python', 'nmaproot.py']
sudopass = 'mypassword'
p = Popen(cmd, stdin=PIPE, stderr=PIPE,universal_newlines=True, stdout=PIPE)
output = p.communicate(sudopass + '\n')
I'm unsure of how you can run a given portion of your python code as root without saving it to a file and running it separately. I recommend you go with option 1 as option 2 isn't very good (but it was fun to figure out).
Copy the idle desktop shortcut and name it rootidle then right and change properties. Goto desktop entry and add gksu before /usr/bin/idle3. Then load and run the program
maybe this might help someone here. Found this from one site
scanner.scan(ip_addr, '1-1024', '-v -sS', sudo=True)
use
sudo = True
I want to execute following command on linux terminal using python script
hg log -r "((last(tag())):(first(last(tag(),2))))" work
This command give changesets between last two tags who have affected files in "work" directory
I tried:
import subprocess
releaseNotesFile = 'diff.txt'
with open(releaseNotesFile, 'w') as f:
f.write(subprocess.call(['hg', 'log', '-r', '"((last(tag())):(first(last(tag(),2))))"', 'work']))
error:
abort: unknown revision '((last(tag())):(first(last(tag(),2))))'!
Traceback (most recent call last):
File "test.py", line 4, in <module>
f.write(subprocess.call(['hg', 'log', '-r', '"((last(tag())):(first(last(tag(),2))))"', 'work']))
TypeError: expected a character buffer object
Working with os.popen()
with open(releaseNotesFile, 'w') as file:
f = os.popen('hg log -r "((last(tag())):(first(last(tag(),2))))" work')
file.write(f.read())
How to execute that command using subprocess ?
To solve your problem, change the f.write(subprocess... line to:
f.write(subprocess.call(['hg', 'log', '-r', '((last(tag())):(first(last(tag(),2))))', 'dcpp']))
Explanation
When calling a program from a command line (like bash), will "ignore" the " characters. The two commands below are equivalent:
hg log -r something
hg "log" "-r" "something"
In your specific case, the original version in the shell has to be enclosed in double quotes because it has parenthesis and those have a special meaning in bash. In python that is not necessary since you are enclosing them using single quotes.
I am trying to make list of every command available on my linux (Lubuntu) machine. I would like to further work with that list in Python. Normally to list the commands in the console I would write "compgen -c" and it would print the results to stdout.
I would like to execute that command using Python subprocess library but it gives me an error and I don't know why.
Here is the code:
#!/usr/bin/python
import subprocess
#get list of available linux commands
l_commands = subprocess.Popen(['compgen', '-c'])
print l_commands
Here is the error I'm getting:
Traceback (most recent call last):
File "commands.py", line 6, in <module>
l_commands = subprocess.Popen(['compgen', '-c'])
File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1249, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
I'm stuck. Could you guys help me with this? How to I execute the compgen command using subprocess?
compgen is a builtin bash command, run it in the shell:
from subprocess import check_output
output = check_output('compgen -c', shell=True, executable='/bin/bash')
commands = output.splitlines()
You could also write it as:
output = check_output(['/bin/bash', '-c', 'compgen -c'])
But it puts the essential part (compgen) last, so I prefer the first variant.
I'm not sure what compgen is, but that path needs to be absolute. When I use subprocess, I spell out the exact page /absolute/path/to/compgen