I am trying to take input() from keyboard but EOFError is received.
Does anyone know how to solve this issue?
test.py
import sys
if sys.stdin.isatty():
print("keyboard input is working")
else:
print("keyboard input is not working")
# read all input from stdin
data = sys.stdin.read()
print(data)
r = input("Enter something here:")
print(r)
Now, create a dummy text file and pass it to python
#dummy.txt
dummy text goes here.
I then called the python script on Windows using this command:
C:\> test.py < dummy.txt
This is the error I received:
keyboard input is not working
dummy text goes here.
Enter something here:Traceback (most recent call last):
File "C:\test.py", line 11, in <module>
r = input("Enter something here:")
EOFError: EOF when reading a line
C:\>
I kind of know how to solve this issue in Linux by open a file descriptor on /dev/tty and pass it back to sys.stdin but how do I archive this on Windows?
I notice function msvcrt.getch() could work, but there should be a better solution that I can utilize input() function for cross-platform compat.
Please help, anyone!
Related
I'm not sure but I imagine that there may be issues similar to mine, but I have not found any that has been satisfactory.
When I open my Jupyter Lab and execute a cell as below (code01), it remains with the status of * (see figure01 below) meaning that it is still running the code, but the output of the out1.txt file is printed correctly.
I would like to know if it is normal for the cell to remain running in this circumstances described from code01.
code01:
import sys
file = open('out1.txt', 'a')
sys.stdout = file
print("house")
file.close()
figure01:
Because you redirect the stdout to a file and then close it you are breaking the IPython kernel underneath: there is no way for any stdout to be correctly processed by the kernel afterwards (cannot write to a closed file). You can reproduce it by executing your code in the IPython console rather than in a notebook. To fix this you could rebind the original stdout back:
import sys
file = open('out1.txt', 'a')
stdout = sys.stdout
sys.stdout = file
print("house")
# before close, not after!
sys.stdout = stdout
file.close()
But this is still not 100% safe; you should ideally use context managers instead:
from contextlib import redirect_stdout
with open('out1.txt', 'a') as f:
with redirect_stdout(f):
print('house')
But for this particular case why not to make use the file argument of the print() function?
with open('out1.txt', 'a') as f:
print('house', file=f)
I'm trying to add input to my python code
isAge = input("Enter your age: ")
and it shows me the following error:
enter your age: Traceback (most recent call last):
File "test2.py", line 3, in <module>
isAge = input("enter your age: ")
EOFError: EOF when reading a line
I use "w !python" to run the code.
I tried w !python 18" Where 18 is the age number, but it didnt work
If you use :w !python from Vim, it will start a Python interpreter and pipe the script to the interpreter, which means the Python interpreter's standard input will be connected to this pipe through which Vim will send it the script, and not to the console.
So Python functions such as input() will not work to read input from the user, since the interpreter does not have its standard input connected to the console.
To solve this, instead of having Vim pipe the script to a Python interpreter, have it invoke the Python interpreter with the script as an argument. So instead of :w !python, use:
:w
:!python %
This assumes you're editing a file and not an unnamed buffer. If you have an unnamed buffer, then save it to a *.py first.
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'
For an assignment I'm supposed to have to have a line to open a file that is passed as an argument in the commandline, I keep getting
Traceback (most recent call last):
File "execute.py", line 1, in <module>
program=open(programfilename, "r")
NameError: name 'programfilename' is not defined
My code to this point is program=open(programfilename, "r"). I'm not quiet sure what is wrong. It is the first line in my program. Execute.py is the name of my code.
You need to set the programfilename variable to the name/path of the file on a previous line. Alternatively, you could put the filename in quotes instead.
It is the first line in my program
Well there's your problem. You are using programfilename without having defined it first.
Try something like
import sys
programfilename = sys.argv[0] # argument you passed into your program.
program=open(programfilename, "r")
I am not sure what exactly you are trying to.
If you want to call a file using command line, the code can be like this
import sys
with open(sys.argv[1], 'r') as f:
print(f.read())
Run like this
python3 execute.py programfilename
If you want your program to get printed on the console, the code can be like this
import sys
with open(sys.argv[0], 'r') as f:
print(f.read())
This will print the code on the console.
Run like this
python3 execute.py
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